Lightweight multifunctional bridge girder erection machine and construction method

Abstract

The invention relates to a light-weight multifunctional bridge girder erection machine and a construction method. The light-weight multifunctional bridge girder erection machine comprises a single main beam, and a front hoisting crown block and a rear hoisting crown block are connected to the single main beam in a sliding mode; the top of the front supporting leg is in sliding connection with the single main beam, the supporting height of the single main beam is vertically adjusted, and the bottom of the front supporting leg is connected with a first walking mechanism; the middle supporting leg is connected with the single main beam in a sliding manner and is used for vertically adjusting the supporting height of the single main beam; the top of the rear supporting leg is connected with the single main beam in a sliding mode, the supporting height of the single main beam is vertically adjusted, and the bottom of the rear supporting leg is connected with a second walking mechanism. According to the lightweight multifunctional bridge girder erection machine, the front supporting leg, the middle supporting leg and the rear supporting leg can stretch out and draw back, then the single girder can be supported to the set height, supporting conversion between the single girder and the set height can be achieved, and different construction scenes can be met. The first walking mechanism and the second walking mechanism can actively drive the front supporting leg, the rear supporting leg and the bridge girder erection machine to steer and move so as to be suitable for different construction scenes.

Description

Technical Field

[0001] The present application relates to the technical field of bridge erection machines, and in particular to a lightweight multifunctional bridge erection machine and a construction method. Background Art

[0002] Through the investigation of the current status of existing urban bridge construction, it was found that there is an average of less than 500m in the existing urban roads, and the construction breakpoints of the bridge erection machine are dense, requiring frequent transfers; the underground pipelines in the construction area are complicated, and the ground high-voltage lines, signal lines and other existing facilities are everywhere, so the operation space of the bridge erection machine is limited. Among the existing urban elevated roads, interchange ramps and parallel ramps account for about 30%, and the curve radius of many interchange ramps is less than 200m, which is much smaller than that of highway bridges; the height difference of the bridge at the parallel ramp is large, the spacing is small, and the operation space is limited; in addition, in order to ensure urban traffic and safety, the scope of bridge construction operations is usually the projection area of ​​the bridge, and some components temporarily occupy 2-3 lanes during installation, and the operation space is limited.

[0003] Existing bridge erection machines are mainly used for construction scenes with open sites such as highways and railways. They are large in size and weight, and do not take into account the frequent on-and-off bridge, transfer, transportation, and construction needs of small-radius interchange ramps and parallel ramps in urban bridge construction. They are difficult to adapt to the densely populated urban bridge construction environment. In addition, existing bridge erection machines can generally only erect main beams, while bridge piers, cap beams, etc. are mostly constructed using cast-in-place methods, which takes a long construction period. Bridge erection machines that can simultaneously erect piers, cap beams, and main beams have a large size and complex structure, and take a long time to transfer and install, making them difficult to adapt to urban environments that require frequent transfers.

[0004] In view of this, there is an urgent need to improve the existing bridge-building machines and construction methods to adapt to the needs of prefabricated bridge construction in complex urban environments and improve the efficiency of urban bridge construction. Summary of the invention

[0005] The embodiment of the present application provides a lightweight multifunctional bridge-building machine and a construction method to solve the problems in the related art that traditional bridge-building machines are large in size and weight, have single functions, take a long time to transfer and install, and are difficult to adapt to the needs of building prefabricated bridges in complex urban environments.

[0006] A first aspect of an embodiment of the present application provides a lightweight multifunctional bridge erecting machine, comprising:

[0007] A single main beam, on which a front crane and a rear crane are slidably connected;

[0008] A front leg, the top of which is slidably connected to the single main beam and vertically adjusts the support height of the single main beam, and the bottom of which is connected to a first running mechanism;

[0009] A middle leg, wherein the middle leg is slidably connected to the single main beam and vertically adjusts the support height of the single main beam;

[0010] The rear supporting leg has a top that is slidably connected to the single main beam and vertically adjusts the supporting height of the single main beam, and the bottom of the rear supporting leg is connected to a second traveling mechanism.

[0011] In some embodiments, the single main beam comprises a plurality of detachably connected single main beam segments, and the plurality of single main beam segments are sequentially extended to form the single main beam;

[0012] An upper slide rail slidably connecting the front legs and the middle legs is provided at the top of the single main beam, and a lower slide rail slidably connecting the rear legs, the front crane and the rear crane is provided at the bottom of the single main beam of the bridge erecting machine.

[0013] In some embodiments, the multiple sections of the single main beam segments are connected by a quick connection device, and the quick connection device includes a plug and a socket that are inserted and unplugged between two adjacent sections of the single main beam segments, and a cylindrical pin is inserted between the plug and the socket;

[0014] The bridge erecting machine is equipped with a beam transport vehicle for transporting single main beam segments, prefabricated piers, prefabricated cap beams, and prefabricated main beams.

[0015] In some embodiments, the front legs include a first variable width beam sliding on the single main beam, and the bottoms of both ends of the first variable width beam are connected to first support columns with adjustable heights;

[0016] The first supporting column comprises a plurality of steel lattice frames which are connected in sequence, and a first lifting frame for lifting the first supporting column is provided on the top of the first running mechanism.

[0017] In some embodiments, the middle leg comprises a second variable width beam slidably connected to the single main beam, and the bottoms of both ends of the second variable width beam are connected to second support columns with adjustable heights;

[0018] A transverse track is slidably disposed at the bottom of the second supporting column, and the second variable width beam, the second supporting column and the transverse track form a rectangular structure;

[0019] A slewing mechanism for driving the middle leg to rotate is connected between the second variable-width cross beam and the single main beam.

[0020] In some embodiments, the rear leg comprises a third leg cross beam sliding on the single main beam, and the bottoms of both ends of the third leg cross beam are connected to third support columns with adjustable height;

[0021] The bottom of the third supporting column is detachably connected to a lifting lattice column through a support, and the lifting lattice column includes a plurality of steel lattice frames connected in sequence;

[0022] A second lifting frame for lifting the lifting lattice column and the third supporting column for lifting and lowering motion is provided between the bottom of the lifting lattice column and the top of the second running mechanism.

[0023] In some embodiments, the bottom of the front lifting trolley and the rear lifting trolley are connected to an upper lifting pole beam through a wire rope and a pulley block, and the middle of the upper lifting pole beam is connected to a rotary sling;

[0024] The bottom of the rotary sling is connected to a lower lifting pole beam via a cross universal joint, and a first telescopic mechanism and a second telescopic mechanism for driving the lower lifting pole beam to rotate around the cross universal joint are provided between the rotary sling and the lower lifting pole beam sling.

[0025] In some embodiments, a pier column turning frame and a cushion block used in conjunction with the front lifting trolley and the rear lifting trolley are also included. The pier column turning frame includes a base and an "L"-shaped turning frame that turns on the base.

[0026] A second aspect of the embodiments of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine self-mounting the bridge, the steps are as follows:

[0027] Support the single main beam on the ground with the front and rear legs, control the middle leg to move forward and adjust its height from the ground so that the middle leg is supported on the top of the rear end of the erected main beam;

[0028] Adjust the single main beam to be supported by the front and middle legs, and release the connection between the third supporting column in the rear leg and the jacking lattice column;

[0029] Control the third supporting column to move forward, adjust the height of the third supporting column, make the third supporting column support the erected main beam, and remove the top lattice column;

[0030] Adjust the single main beam to be supported by the front legs and the third supporting column, and after the middle legs are emptied, control the middle legs to move forward and support the top of the front end of the erected main beam;

[0031] Adjust the single main beam to be supported by the front legs and the middle legs, vacate the third supporting column, and use the front legs to drive the single main beam forward to the beam erection position to complete the bridge erection machine bridge operation.

[0032] In some embodiments, the method further includes the bridge erecting machine lowering the bridge by itself, the steps are as follows:

[0033] The single main beam is supported by the front legs and the middle legs. The height and width of the third supporting column of the rear legs are reduced, and the third supporting column is controlled to pass through the middle legs to reach the outside of the erected main beam;

[0034] The second running mechanism at the bottom of the jacking lattice column is moved, and the second running mechanism moves the jacking lattice column to below the third supporting column;

[0035] Coordinately control the position and height of the third supporting column and the jacking lattice column, and connect and fix the third supporting column and the jacking lattice column through the support;

[0036] Adjust the single main beam to be supported by the front and rear legs, detach the middle legs, and control the front and rear legs to move forward until the bridge-erecting machine is located outside the front end of the erected main beam, completing the bridge-erecting machine lowering operation.

[0037] In some embodiments, the method further includes converting the bridge erecting machine from the front leg ground support to the front leg pier support, the steps are as follows:

[0038] The front outrigger is positioned on the ground behind the pier in front of the erected main beam, the middle outrigger and the third supporting column are supported on the erected main beam, and the second running mechanism moves the jacking lattice column to the ground in front of the pier in front of the erected main beam;

[0039] Adjust the height of the lifting lattice column so that the front end of the single main beam is supported on the lifting lattice column;

[0040] The single main beam is supported by the jacking lattice column, the middle leg and the third supporting column. The connection between the two steel lattice frames in the first supporting column of the front leg is released, and the front leg is decomposed into the front leg upper part and the front leg ground part. The pier top support is installed on the top of the pier column before the erected main beam;

[0041] The upper part of the front outrigger driving the front outrigger moves forward along the single main beam and is connected with the pier top support;

[0042] The single main beam is adjusted to be supported by the upper part of the front leg, the middle leg and the third supporting column of the front leg. The jacking lattice column is emptied and removed. The bridge-building machine completes the conversion of the front leg from being supported on the ground to being supported by the pier column.

[0043] A third aspect of the embodiments of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine installing a prefabricated pier transported on the ground on the ground, the steps being as follows:

[0044] The front legs and the rear legs of the bridge erecting machine are both supported on the ground. After the bridge erecting machine is supported on the ground on both sides of the hole to be installed by using the first running mechanism and the second running mechanism, the first running mechanism and the second running mechanism are locked;

[0045] Adjust the support height of the front outrigger and rear outrigger, and connect the front crane and rear crane to the lifting pole beam through wire ropes and pulley blocks;

[0046] Use a beam transporter to transport the prefabricated pier to the vicinity of the hole to be installed. One end of the prefabricated pier is supported on the pier turning frame, and the other end is provided with a pier lifting lug. The beam transporter adjusts the position of the prefabricated pier so that the prefabricated pier is located directly below the bridge erecting machine.

[0047] The front crane and the rear crane lower the lifting pole beam and connect it with the pier column lifting ears. The front crane and the rear crane slowly lift the prefabricated pier column, move backwards while lifting, and slowly lift the pier column under the action of the pier column turning frame;

[0048] After the prefabricated pier column is completely lifted vertically, the beam transport vehicle is removed, and the front lifting crane and the rear lifting crane lift the prefabricated pier column to the top of the hole to be installed for alignment installation.

[0049] In some embodiments, the method further comprises installing the prefabricated cap beam transported on the ground by a bridge erecting machine, the steps being as follows:

[0050] The front legs and the rear legs of the bridge erecting machine are supported on the ground, and after the bridge erecting machine is supported on the ground on both sides of the erected pier column by using the first running mechanism and the second running mechanism, the first running mechanism and the second running mechanism are locked;

[0051] Adjust the support height of the front and rear outriggers, and install the slewing sling and the lower lifting pole beam on the upper lifting pole beam;

[0052] Use a beam transporter to transport the prefabricated cap beam to the vicinity of the hole to be installed;

[0053] The beam transport vehicle is driven to rotate the prefabricated cap beam from the longitudinal direction of the bridge to the transverse direction of the bridge in the plane and is placed directly below the bridge erecting machine;

[0054] The front crane and the rear crane lower the rotary sling and the lower lifting pole beam to connect with the prefabricated cap beam, and slowly lift the prefabricated cap beam so that the bottom of the prefabricated cap beam is higher than the reserved anchor steel bars of the erected pier column;

[0055] Coordinate the movement of the front crane and the rear crane to lift the prefabricated cap beam to the top of the erected pier column;

[0056] The rotary hanger, the first telescopic mechanism and the second telescopic mechanism are driven to accurately adjust the posture of the prefabricated cap beam and to align and install it with the top of the erected pier column.

[0057] In some embodiments, the method further comprises installing the prefabricated main beam transported on the ground by a bridge erecting machine, the steps being as follows:

[0058] The front legs and rear legs of the bridge erecting machine are supported on the ground, and the bridge erecting machine is placed across the outer side of the adjacent erected piers in the longitudinal direction of the bridge by using the first running mechanism and the second running mechanism, and the first running mechanism and the second running mechanism are locked;

[0059] Adjust the support height of the front and rear outriggers;

[0060] Use a beam transporter to transport the prefabricated main beam to the vicinity of the hole to be erected. Along the height direction of the erected piers, the rear end of the prefabricated main beam is located below the erected cap beam at the top of the next erected pier, and the front end of the prefabricated main beam is located outside the erected cap beam at the top of the previous erected pier;

[0061] Coordinated control of the front crane and the rear crane to jointly lift the precast main beam;

[0062] When the rear end of the precast main beam approaches the bottom of the cap beam on the top of the next erected pier, the rear crane stops lifting and the front crane continues lifting, so that the front end of the precast main beam is higher than the cap beam on the top of the previous erected pier, so that the precast main beam is in an inclined state;

[0063] Control the front crane and the rear crane to move forward so that the rear end of the prefabricated main beam is located outside the front side of the erected cap beam on the top of the next erected pier column;

[0064] Keep the height and position of the front crane unchanged, and the rear crane lifts the prefabricated main beam to adjust the prefabricated main beam from an inclined state to a horizontal state;

[0065] The front crane and the rear crane are coordinated to move backwards to lift the prefabricated main beam to the designed position for lowering and installation.

[0066] A fourth aspect of the embodiments of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine installing a prefabricated pier transported by the bridge deck on the bridge deck, the steps being as follows:

[0067] The front legs of the bridge erector are supported on the ground, the middle legs and the third supporting column are supported on the erected main beam, and the bridge erector is adjusted to a suitable height;

[0068] Use the front and rear beam transporters to transport the prefabricated piers from the erected main beam to the rear of the bridge erecting machine, so that the front end of the prefabricated piers is located under the front crane;

[0069] The front crane hoists the prefabricated pier column, so that the front end of the prefabricated pier column is hung on the front crane, and the rear end is supported on the rear beam transport vehicle, and the front beam transport vehicle is moved away;

[0070] Coordinately control the front crane and the rear beam transporter to move forward to position the rear end of the prefabricated pier at the lifting position of the rear crane;

[0071] The rear crane hoists the prefabricated pier column, so that the prefabricated pier column is suspended on the front crane and the rear crane, and the front crane and the rear crane are controlled to move forward to the vicinity of the hole to be installed;

[0072] The front crane and the rear crane lower the prefabricated pier column, so that one end of the prefabricated pier column is supported on the pier column turning frame on the ground, and the other end is supported on the pad block on the bottom;

[0073] Adjust the positions of the front and rear cranes and install the upper lifting pole beam. The lifting rope of the upper lifting pole beam is installed on the top of the prefabricated pier column in preparation for lifting;

[0074] The front crane and the rear crane are controlled in coordination to lift and move backwards together, so that the prefabricated pier is slowly lifted and adjusted from a horizontal state to a vertical state;

[0075] The front crane and the rear crane are controlled in coordination to vertically lift the prefabricated pier column to the top of the hole to be installed for alignment installation.

[0076] In some embodiments, the method includes installing a prefabricated cap beam transported by a bridge deck on a bridge deck by a bridge erecting machine, the steps being as follows:

[0077] The front legs of the bridge erector are supported on the ground, the middle legs and the third supporting column are supported on the erected main beam, and the bridge erector is adjusted to a suitable height;

[0078] Adjust the positions of the front and rear cranes, and install the slewing sling and the lower lifting pole beam on the upper lifting pole beam;

[0079] Use a beam transporter to transport the prefabricated cap beam from the erected main beam to the tail of the bridge erecting machine, so that the prefabricated cap beam is located below the rotary hanger and the lower lifting pole beam;

[0080] After the lower lifting pole beam is connected with the prefabricated cap beam, the front lifting crane and the rear lifting crane lift the prefabricated cap beam and move the beam transport vehicle away;

[0081] The front crane and the rear crane are controlled in coordination to lift the prefabricated cap beam to the outside of the erected main beam, and the prefabricated cap beam is adjusted from the longitudinal direction to the transverse direction through the rotating hoist;

[0082] Continue to control the front crane and the rear crane to lift the prefabricated cap beam and move it forward to the top of the erected pier column;

[0083] The rotary hanger, the first telescopic mechanism and the second telescopic mechanism are driven to accurately adjust the posture of the prefabricated cap beam and to align and install it with the top of the erected pier column.

[0084] In some embodiments, the method includes installing a prefabricated main beam transported by a bridge deck on a bridge deck by a bridge erecting machine, the steps being as follows:

[0085] The front legs of the bridge erector are supported on the ground, the middle legs and the third supporting column are supported on the erected main beam, and the bridge erector is adjusted to a suitable height;

[0086] Use the front and rear beam transporters to transport the prefabricated main beam from the erected main beam to the rear of the bridge erecting machine, so that the front end of the prefabricated main beam is located under the front crane;

[0087] The front crane hoists the prefabricated main beam, so that the front end of the prefabricated main beam is hung on the front crane, and the rear end is supported on the rear beam transport vehicle, and the front beam transport vehicle is moved away;

[0088] The front crane and the rear beam transporter are cooperatively controlled to move forward to position the rear end of the prefabricated main beam at the lifting position of the rear crane;

[0089] The rear crane hoists the prefabricated main beam, so that the prefabricated main beam is suspended on the front crane and the rear crane, and the front crane and the rear crane are controlled to move forward to the vicinity of the hole to be installed;

[0090] After controlling the front lifting crane and the rear lifting crane to adjust the prefabricated main beam to the designed position, the front lifting crane and the rear lifting crane will lower the prefabricated main beam for alignment installation.

[0091] A fifth aspect of the embodiments of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the steps of installing a prefabricated main beam for a curved bridge transported by the bridge deck by the bridge erecting machine, and:

[0092] The front outrigger of the bridge erector is supported on the ground, the middle outrigger and the third supporting column are supported on the erected main beam, and the bridge erector is adjusted to the inner side of the curved bridge;

[0093] Use the front and rear beam transport vehicles to transport the outermost prefabricated main beams of the curved bridge to the tail of the bridge erecting machine on the erected main beams;

[0094] After the front end of the precast main beam reaches the designed lifting position of the front crane, the front crane lifts the front end of the precast main beam, and the rear end of the precast main beam is supported on the rear beam transport vehicle;

[0095] The bridge erection machine is adjusted to be supported by the front legs and the middle legs, and the bridge erection machine and the beam transport vehicle are coordinated to control the first traveling mechanism to rotate the single main beam around the slewing mechanism of the middle legs, so that the prefabricated main beam moves forward while gradually adjusting the angle until it is parallel to the single main beam;

[0096] When the rear end of the prefabricated main beam reaches the designed lifting position of the rear lifting crane, the rear lifting crane lifts the rear end of the prefabricated main beam. At this time, the prefabricated main beam is suspended on the front lifting crane and the rear lifting crane.

[0097] The bridge erection machine hoists the prefabricated main beam and moves it horizontally to the designed installation position, lowers it for installation, and completes the erection of the outermost side beam;

[0098] Repeat the above steps, the bridge erection machine and the beam transport vehicle rotate and feed the beams in coordination, and complete the installation of the remaining prefabricated main beams from the outer arc to the inner arc of the curved bridge.

[0099] A sixth aspect of the embodiments of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine crossing the obstacle in front by itself, the steps being as follows:

[0100] The front legs of the bridge erecting machine are moved to the vicinity of the obstacle in front, and the bridge erecting machine is adjusted to be supported by the front legs and the middle legs. After the width and height of the third supporting column are controlled, the machine is moved forward through the middle legs to the outside of the erected main beam;

[0101] Drive the second running mechanism at the bottom of the jacking lattice column to move the jacking lattice column to below the third supporting column;

[0102] Coordinated control to adjust the position and height of the third supporting column and the jacking lattice column, and use the support to connect and fix the third supporting column and the jacking lattice column to form a rear support leg;

[0103] The bridge erecting machine is adjusted to be supported by the rear legs and the middle legs, the connection between the two steel lattice frames in the first supporting column of the front legs is released, and the front legs are decomposed into the front leg upper part and the front leg ground part;

[0104] Lower the height of the front outrigger ground component and move the front outrigger ground component to the existing obstacle in front;

[0105] The bridge erecting machine is supported by the middle legs and the rear legs, driving the second traveling mechanism at the bottom of the jacking lattice column to move the bridge erecting machine forward until the upper part of the front legs is above the ground part of the front legs;

[0106] Coordinately control the position and height of the front leg upper component and the front leg ground component, and connect and fix the front leg upper component and the front leg ground component to form the front leg;

[0107] Adjust the bridge-erector to be supported by the front and rear legs, and move the middle leg forward to support above the obstacle;

[0108] The bridge erecting machine is supported by the front legs and the middle legs, and the bridge erecting machine is controlled to move forward and move the rear legs to the vicinity of the obstacle, and the connection between the third supporting column and the jacking lattice column is released;

[0109] Adjust the height of the jacking lattice column, move the jacking lattice column to the obstacle, and reconnect the third supporting column and the jacking lattice column to form the rear support leg;

[0110] The above steps are reversed to complete the operation of the bridge erecting machine coming down from the obstacle and completing the operation of the bridge erecting machine crossing the obstacle.

[0111] A seventh aspect of the embodiments of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine automatically transferring to another site, the steps being as follows:

[0112] If there is no obstacle in front of the bridge erecting machine and the transfer is short, the first running mechanism and the second running mechanism at the bottom of the front legs and the rear legs can be directly driven to transfer automatically;

[0113] For limited height requirements in front of the bridge erector or long-distance transfer, the following steps can be used for self-transfer:

[0114] Adjust the bridge erecting machine to be supported by the front legs and rear legs, and lower the front legs and rear legs to the lowest height;

[0115] Extend the middle outrigger to its longest length, adjust the bridge erecting machine to be supported by the front outrigger and the middle outrigger, release the connection between the third supporting column of the rear outrigger and the jacking lattice column, and remove the jacking lattice column;

[0116] The bridge erecting machine is supported by the front legs and the middle legs, the third supporting column is longitudinally moved to the vicinity of the front legs, and the height of the front legs and the middle legs is further lowered;

[0117] Adjust the height of the third supporting column, adjust the bridge erection machine to be supported by the middle supporting leg and the third supporting column, release the connection between the front supporting leg and the single main beam, and remove the front supporting leg;

[0118] The bridge erection machine is supported by the middle legs and the third supporting column. Two beam transport vehicles are arranged under each single main beam section under the bridge erection machine. The middle legs and the third supporting column continue to lower the height of the single main beam until the single main beam is supported on the beam transport vehicle.

[0119] The bridge erecting machine is supported by the beam transporter, and the middle leg and the third supporting column continue to shorten or flip upward until they are off the ground;

[0120] The connection between the single main beam segments is released to decompose the single main beam into multiple single main beam segments, and each single main beam segment is transported in sections by a beam transport vehicle to complete the long-distance and rapid transfer operation of the bridge-building machine.

[0121] The beneficial effects of the technical solution provided by this application include:

[0122] The embodiment of the present application provides a lightweight multifunctional bridge-building machine and a construction method. Since the lightweight multifunctional bridge-building machine of the present application is provided with a single main beam, a front lifting trolley and a rear lifting trolley are slidably connected to the single main beam; a front support leg, the top of which is slidably connected to the single main beam and the support height of the single main beam is vertically adjusted, and the bottom of the front support leg is connected to a first running mechanism; a middle support leg, which is slidably connected to the single main beam and the support height of the single main beam is vertically adjusted; a rear support leg, the top of which is slidably connected to the single main beam and the support height of the single main beam is vertically adjusted, and the bottom of the rear support leg is connected to a second running mechanism.

[0123] Therefore, the front legs, middle legs and rear legs of the lightweight multifunctional bridge-building machine applied for can not only move along the length direction of the single main beam, but also the telescopic movements of the front legs, middle legs and rear legs can support the single main beam to a set height, as well as the mutual support conversion to meet different construction scenarios. The bottoms of the front legs and the rear legs are respectively connected to the first running mechanism and the second running mechanism, which can actively drive the front legs, the rear legs and the bridge-building machine to turn and move to suit different construction scenarios.

[0124] The bridge-erecting machine of the present application can realize operations such as getting on and off the bridge as a whole, crossing obstacles, etc., and can meet the erection operations of prefabricated piers, prefabricated cap beams, and prefabricated main beams in scenes such as the ground and bridge deck, and realize the installation of various types of bridge components with one machine. The front and rear legs of the bridge-erecting machine are assembled using a standard modular steel lattice frame, which can greatly adjust the height of the bridge-erecting machine, improve the adaptability of the bridge-erecting machine, and reduce the size and weight of the bridge-erecting machine. At the same time, based on the single main beam segmented setting, the bridge-erecting machine can be disassembled on site and quickly transferred to other sites with the help of a beam transporter, meeting the needs of prefabricated bridge construction in complex urban environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0125] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0126] Figure 1 This is a structural schematic diagram of a bridge erecting machine according to an embodiment of the present application;

[0127] Figure 2 This is a schematic structural diagram of the front legs of an embodiment of the present application;

[0128] Figure 3 This is a schematic diagram of the structure of the supporting legs in the embodiment of the present application;

[0129] Figure 4This is a structural schematic diagram of the state of the rear outriggers standing on the bridge deck in the embodiment of the present application;

[0130] Figure 5 This is a schematic diagram of the structure of the embodiment of the present application with the rear legs standing on the ground;

[0131] Figure 6 This is a structural diagram of step S11 when the bridge erecting machine of the embodiment of the present application goes up the bridge by itself;

[0132] Figure 7 This is a structural schematic diagram of step S12 when the bridge erecting machine of the embodiment of the present application goes up the bridge by itself;

[0133] Figure 8 This is a structural diagram of step S13 when the bridge erecting machine of the embodiment of the present application goes up the bridge by itself;

[0134] Fig. 9 This is a structural schematic diagram of step S14 when the bridge erecting machine of the embodiment of the present application goes up the bridge by itself;

[0135] Fig.10 This is a structural schematic diagram of step S15 when the bridge erecting machine of the embodiment of the present application automatically descends the bridge;

[0136] Fig.11 This is a structural schematic diagram of step S16 when the bridge erecting machine of the embodiment of the present application automatically descends the bridge;

[0137] Fig.12 This is a structural schematic diagram of step S17 when the bridge erecting machine of the embodiment of the present application automatically descends the bridge;

[0138] Fig.13 This is a structural schematic diagram of step S18 when the bridge erecting machine of the embodiment of the present application automatically descends the bridge;

[0139] Fig.14 This is a structural schematic diagram of step S19 when the bridge erecting machine of the embodiment of the present application is converted from the front leg ground support to the front leg pier support;

[0140] Fig.15 This is a structural schematic diagram of step S20 when the bridge erecting machine of the embodiment of the present application is converted from the front leg ground support to the front leg pier support;

[0141] Fig.16 This is a structural schematic diagram of step S21 when the bridge erecting machine of the embodiment of the present application is converted from the front leg ground support to the front leg pier support;

[0142] Fig.17 This is a structural schematic diagram of step S22 when the bridge erecting machine of the embodiment of the present application is converted from the front leg ground support to the front leg pier support;

[0143] Fig.18This is a structural schematic diagram of step S23 when the bridge erecting machine of the embodiment of the present application is converted from the front leg ground support to the front leg pier support;

[0144] Fig.19 This is a structural schematic diagram of step S11 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported on the ground on the ground;

[0145] Fig. 20 This is a structural schematic diagram of step S12 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported on the ground on the ground;

[0146] Fig.21 This is a structural schematic diagram of step S13 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported on the ground on the ground;

[0147] Fig. 22 This is a structural schematic diagram of step S14 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported on the ground on the ground;

[0148] Fig.23 This is a structural schematic diagram of step S15 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported on the ground on the ground;

[0149] Fig.24 This is a structural schematic diagram of step S16 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported on the ground on the ground;

[0150] Fig.25 This is a structural schematic diagram of step S17 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported on the ground on the ground;

[0151] Fig.26 This is a structural schematic diagram of step S18 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported on the ground on the ground;

[0152] Fig. 27 This is a structural schematic diagram of step S19 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam transported on the ground on the ground;

[0153] Fig.28 This is a structural schematic diagram of step S20 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam transported on the ground on the ground;

[0154] Fig.29 This is a structural schematic diagram of step S21 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam transported on the ground on the ground;

[0155] Fig.30 This is a structural schematic diagram of step S22 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam transported on the ground on the ground;

[0156] Fig.31This is a structural schematic diagram of step S23 when the bridge erecting machine of the embodiment of the present application installs the prefabricated main beam transported on the ground on the ground;

[0157] Fig.32 This is a structural schematic diagram of step S11 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported by the bridge deck on the bridge deck;

[0158] Fig.33 This is a structural schematic diagram of step S12 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported by the bridge deck on the bridge deck;

[0159] Fig.34 This is a structural schematic diagram of step S13 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported by the bridge deck on the bridge deck;

[0160] Fig.35 This is a structural schematic diagram of step S14 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported by the bridge deck on the bridge deck;

[0161] Fig.36 This is a structural schematic diagram of step S15 when the bridge erecting machine of the embodiment of the present application installs the prefabricated piers transported by the bridge deck on the bridge deck;

[0162] Fig.37 This is a structural schematic diagram of step S16 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported by the bridge deck on the bridge deck;

[0163] Fig.38 This is a structural schematic diagram of step S17 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported by the bridge deck on the bridge deck;

[0164] Fig.39 This is a structural schematic diagram of step S18 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported by the bridge deck on the bridge deck;

[0165] Fig.40 This is a structural schematic diagram of step S19 when the bridge erecting machine of the embodiment of the present application installs the prefabricated cap beam transported by the bridge deck on the bridge deck;

[0166] Fig.41 This is a structural schematic diagram of step S20 when the bridge erecting machine of the embodiment of the present application installs the prefabricated main beam transported by the bridge deck on the bridge deck;

[0167] Fig.42 This is a structural schematic diagram of step S21 when the bridge erecting machine of the embodiment of the present application installs the prefabricated main beam transported by the bridge deck on the bridge deck;

[0168] Fig.43 This is a structural schematic diagram of step S22 when the bridge erecting machine of the embodiment of the present application installs the prefabricated main beam transported by the bridge deck on the bridge deck;

[0169] Fig.44This is a structural schematic diagram of step S23 when the bridge erecting machine of the embodiment of the present application installs the prefabricated main beam transported by the bridge deck on the bridge deck;

[0170] Fig.45 This is a structural schematic diagram of step S11 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam for a curved bridge transported by a bridge deck;

[0171] Fig.46 This is a structural schematic diagram of step S12 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam for a curved bridge transported by a bridge deck;

[0172] Fig.47 This is a structural schematic diagram of step S13 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam for a curved bridge transported by a bridge deck;

[0173] Fig.48 This is a structural schematic diagram of step S14 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam for a curved bridge transported by a bridge deck;

[0174] Fig.49 This is a structural schematic diagram of step S15 when the bridge erecting machine of the embodiment of the present application installs a prefabricated main beam for a curved bridge transported by a bridge deck;

[0175] Fig.50 This is a structural schematic diagram of step S11 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0176] Fig.51 This is a structural schematic diagram of step S12 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0177] Fig.52 This is a structural schematic diagram of step S13 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0178] Fig.53 This is a structural schematic diagram of step S14 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0179] Fig.54 This is a structural schematic diagram of step S15 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0180] Fig.55 This is a structural schematic diagram of step S16 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0181] Fig.56 This is a structural schematic diagram of step S17 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0182] Fig.57 This is a structural schematic diagram of step S18 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0183] Fig.58 This is a structural schematic diagram of step S19 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0184] Fig.59 This is a structural schematic diagram of step S20 when the bridge erecting machine of the embodiment of the present application crosses the obstacle in front by itself;

[0185] Fig.60 This is a structural diagram of step S11 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0186] Fig.61 This is a structural schematic diagram of step S12 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0187] Fig.62 This is a structural diagram of step S13 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0188] Fig.63 This is a structural diagram of step S14 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0189] Fig.64 This is a structural schematic diagram of step S15 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0190] Fig.65 This is a structural schematic diagram of step S16 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0191] Fig.66 This is a structural diagram of step S17 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0192] Fig.67 This is a structural diagram of step S18 when the bridge erecting machine of the embodiment of the present application automatically transfers to another site;

[0193] Fig.68 This is a structural diagram of step S19 when the bridge-building machine in the embodiment of the present application transfers itself.

[0194] Reference numerals:

[0195] 1. Single main beam; 2. Front outrigger; 3. Middle outrigger; 4. Rear outrigger; 5. Front crane; 6. Rear crane; 7. First running mechanism; 8. Second running mechanism; 9. Rotating sling; 10. Upper lifting pole beam; 11. Constructed cap; 12. Erected piers; 13. Erected cap beam; 14. Erected main beam; 15. Prefabricated piers; 16. Prefabricated cap beam; 17. Prefabricated main beam; 18. Beam transporter; 19. Pier turning frame; 20. Pad; 21. Upper part of front outrigger; 22. Ground part of front outrigger; 23. Pier top support; 24. Obstacle; 25. Reserved anchor bars for erected piers;

[0196] 101. first single main beam segment; 102. second single main beam segment; 103. third single main beam segment; 104. quick connection device; 201. first variable width beam; 202. first supporting column; 203. first lifting frame; 204. first beam locking device; 301. second supporting column; 302. second supporting column locking device; 303. second variable width beam; 304. second beam locking device; 305. slewing mechanism; 306. transverse track; 401. third leg beam; 402. third supporting column; 403. lifting lattice column; 404. second lifting frame; 405. support. DETAILED DESCRIPTION

[0197] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0198] The embodiments of the present application provide a lightweight multifunctional bridge-building machine and a construction method, which can solve the problems in the related art that traditional bridge-building machines are large in size and weight, have single functions, take a long time to transfer and install, and are difficult to adapt to the needs of building prefabricated bridges in complex urban environments.

[0199] See also Figure 1 As shown, the first aspect of the embodiment of the present application provides a lightweight multifunctional bridge erecting machine, comprising:

[0200] The single main beam 1 is a hollow steel beam of a steel structure. A front hoisting trolley 5 and a rear hoisting trolley 6 are slidably connected to the single main beam 1. The front hoisting trolley 5 and the rear hoisting trolley 6 reciprocate along the length direction of the single main beam 1.

[0201] The front legs 2 are slidably connected to the single main beam 1 at the top thereof, and the front legs 2 reciprocate along the length direction of the single main beam 1. The height of the front legs 2 can be adjusted to vertically support and adjust the height of the single main beam 1, and the bottom of the front legs 2 is connected to a first running mechanism 7, which has running, steering, braking and parking functions.

[0202] The middle leg 3 is slidably connected to the single main beam 1. The middle leg 3 reciprocates along the length direction of the single main beam 1. The height of the middle leg 3 can be adjusted to vertically support and adjust the height of the single main beam 1.

[0203] The rear support leg 4 has its top slidably connected to the single main beam 1, and the rear support leg 4 reciprocates along the length direction of the single main beam 1. The height of the rear support leg 4 can be adjusted to vertically support and adjust the height of the single main beam 1. A second running mechanism 8 is connected to the bottom of the rear support leg 4, and the second running mechanism 8 also has running, steering, braking and parking functions.

[0204] The front legs 2, middle legs 3 and rear legs 4 of the lightweight multifunctional bridge-building machine of the embodiment of the present application can not only move along the length direction of the single main beam 1, but also the telescopic movements of the front legs 2, middle legs 3 and rear legs 4 can support the single main beam 1 to a set height, and the support conversion between each other can meet different construction scenarios. The bottoms of the front legs 2 and the rear legs 4 are respectively connected to the first running mechanism 7 and the second running mechanism 8, which can actively drive the front legs 2, the rear legs 4 and the bridge-building machine to turn and move to adapt to different construction scenarios.

[0205] The bridge erection machine of the embodiment of the present application can realize the overall operation of getting on and off the bridge, crossing obstacles, etc., and can meet the erection operations of prefabricated piers 15, prefabricated cap beams 16, and prefabricated main beams 17 in scenes such as the ground and the bridge deck, and realize the installation of multiple types of bridge components with one machine. The front legs 2 and rear legs 4 of the bridge erection machine are assembled using a standard modular steel lattice frame, which can greatly adjust the height of the bridge erection machine, improve the adaptability of the bridge erection machine, and reduce the size and weight of the bridge erection machine. At the same time, based on the segmented setting of the single main beam 1, the bridge erection machine can be disassembled on site and quickly transferred to another site with the help of the beam transport vehicle 18, meeting the construction needs of prefabricated bridges in complex urban environments.

[0206] In some alternative embodiments, see Figure 1 , Figure 60 to Figure 68 As shown, the embodiment of the present application provides a lightweight multifunctional bridge erecting machine, the single main beam 1 of the bridge erecting machine includes multiple detachably connected single main beam segments, and the single main beam segment of the embodiment of the present application is provided with three segments, namely, the first single main beam segment 101, the second single main beam segment 102, and the third single main beam segment 103. The first single main beam segment 101, the second single main beam segment 102, and the third single main beam segment 103 are sequentially extended to form the single main beam 1.

[0207] The single main beam 1 adopts a segmented design, which can be quickly segmented and connected. The length is 1.5 times the length of the prefabricated main beam 17. At the same time, the main beam segment can be increased according to the span of the bridge, which can adapt to bridges with different spans. The first single main beam segment 101, the second single main beam segment 102, and the third single main beam segment 103 are connected by a quick connection device 104. The quick connection device 104 includes a plug and a socket that are longitudinally plugged in and out of each other between two adjacent single main beam segments, and a cylindrical pin is transversely plugged in between the plug and the socket.

[0208] The bridge erection machine is equipped with a beam transporter 18 for transporting single main beam segments, prefabricated piers 15, prefabricated cap beams 16, and prefabricated main beams 17. The beam transporter 18 cooperates with the bridge erection machine to enable the bridge erection machine to install the prefabricated piers 15, prefabricated cap beams 16, and prefabricated main beams 17 transported on the ground, the bridge erection machine to install the prefabricated piers 15, prefabricated cap beams 16, and prefabricated main beams 17 transported on the bridge deck, and transport the first single main beam segment 101, the second single main beam segment 102, and the third single main beam segment 103 of the bridge erection machine in segments, so as to realize self-transfer.

[0209] An upper slide rail is provided at the top of the single main beam 1 for slidingly connecting the front legs 2 and the middle legs 3, and a lower slide rail is provided at the bottom of the single main beam 1 for slidingly connecting the rear legs 4, the front crane 5 and the rear crane 6. An upper slide rail is provided at the top of the single main beam 1 for slidingly connecting the front legs 2 and the middle legs 3, and a lower slide rail is provided at the bottom of the single main beam 1 for slidingly connecting the rear legs 4, the front crane 5 and the rear crane 6, and the rear legs 4 can pass through the middle legs 3 and move forward.

[0210] In some alternative embodiments, see Figure 1 and Figure 2 As shown, an embodiment of the present application provides a lightweight multifunctional bridge-building machine, the front support leg 2 of the bridge-building machine includes a first variable-width beam 201 sliding on the single main beam 1, the first variable-width beam 201 is telescopically adjustable along the width direction of the single main beam 1, and when the telescopic adjustment of the first variable-width beam 201 is completed, it is locked by a first beam locking device 204, and the first beam locking device 204 is preferably but not limited to a cylindrical pin.

[0211] The bottoms of both ends of the first variable width beam 201 are connected to the first support columns 202 with adjustable heights, and the first support columns 202 and the first variable width beam 201 together form a "door" shaped structure. The first support column 202 includes a plurality of steel lattice frames connected in sequence, and the steel lattice frame is a rectangular frame of a set height. The top of the first running mechanism 7 is provided with a first lifting frame 203 for lifting the first support column 202 for lifting and lowering motion.

[0212] The first support column 202, which is composed of multiple sections of steel lattice frames connected in sequence, has the characteristics of light weight and high structural strength, and can be adjusted in height by increasing or decreasing the number of steel lattice frames in the first support column 202 in cooperation with the first lifting frame 203. The first lifting frame 203 is equipped with a lifting cylinder, which is used to lift the steel lattice frame upward when adjusting the height of the first support column 202.

[0213] In some alternative embodiments, see Figure 1 and Figure 3As shown, an embodiment of the present application provides a lightweight multifunctional bridge-building machine, the middle leg 3 of the bridge-building machine includes a second variable-width beam 303 slidably connected to the single main beam 1, the second variable-width beam 303 can be telescopically adjusted along the width direction of the single main beam 1, and when the second variable-width beam 303 is telescopically adjusted, it is locked by a second beam locking device 304, and the second beam locking device 304 is preferably but not limited to a cylindrical pin.

[0214] The bottoms of both ends of the second variable width cross beam 303 are connected to the second support columns 301 with adjustable heights; the second support columns 301 include an upper column and a lower column that are sleeved together, and a plurality of positioning holes arranged at intervals from top to bottom are provided on the upper column and the lower column. The upper column and the lower column are connected by a second support column locking device 302, and the second support column locking device 302 is preferably, but not limited to, a cylindrical pin inserted into the positioning hole between the upper column and the lower column.

[0215] The second variable width cross beam 303 and the second support column 301 together form a "door" shaped structure, and a transverse track 306 is slidably provided at the bottom of the second support column 301, and the second support column 301 can support the single main beam 1 to transversely move along the length direction of the transverse track 306. The second variable width cross beam 303, the second support column 301 and the transverse track 306 together form a rectangular structure. A slewing mechanism 305 for driving the middle support leg 3 to rotate is connected between the second variable width cross beam 303 and the single main beam 1, and the slewing mechanism 305 can rotate the single main beam 1 relative to the middle support leg 3.

[0216] In some alternative embodiments, see Figure 1 , Figure 4 and Figure 5 As shown, the embodiment of the present application provides a lightweight multifunctional bridge erecting machine, the rear legs 4 of the bridge erecting machine include a third leg beam 401 sliding on the single main beam 1, and the bottoms of both ends of the third leg beam 401 are connected to third support columns 402 with adjustable heights. The third support column 402 includes an upper column and a lower column that are sleeved with each other, and a plurality of positioning holes arranged at intervals from top to bottom are provided on the upper column and the lower column, and the upper column and the lower column are mutually locked and positioned by cylindrical pins.

[0217] The third leg crossbeam 401 and the third support column 402 together form a "door" shaped structure. The third leg crossbeam 401 can be a fixed length crossbeam or a variable length crossbeam through telescopic action. The bottom of the third support column 402 is detachably connected to a jacking lattice column 403 through a support 405. The jacking lattice column 403 includes a plurality of steel lattice frames connected in sequence, and the steel lattice frame is a rectangular frame of a set height. A second jacking frame 404 is provided between the bottom of the jacking lattice column 403 and the top of the second running mechanism 8 to lift the jacking lattice column 403 and the third support column 402 for lifting and lowering movements.

[0218] The jacking lattice column 403, which is composed of multiple sections of steel lattice frames connected in sequence, has the characteristics of light weight and high structural strength, and the height can be adjusted by increasing or decreasing the number of steel lattice frames in the jacking lattice column 403 in cooperation with the second jacking sleeve 404. The second jacking sleeve 404 is equipped with a jacking cylinder, which is used to jack up the steel lattice frame when adjusting the height of the jacking lattice column 403.

[0219] When the bridge erection machine is operating on the bridge deck, the connection between the third support column 402 and the lifting lattice column 403 is disconnected, and the rear leg 4 uses the third support column 402 to support the bridge erection machine on the bridge deck. When the bridge erection machine is operating on the ground, the third support column 402 and the lifting lattice column 403 are connected to each other through the support 405, and the rear leg 4 uses the third support column 402, the support 405, the lifting lattice column 403 and the second running mechanism 8 to support the bridge erection machine on the ground.

[0220] In some alternative embodiments, see Figure 1 , Figure 4 and Figure 5 As shown, the embodiment of the present application provides a lightweight multifunctional bridge erecting machine, the bottom of the front hoisting trolley 5 and the rear hoisting trolley 6 of the bridge erecting machine are connected to an upper lifting pole beam 10 through a wire rope and a pulley block, and the middle of the upper lifting pole beam 10 is connected to a slewing sling 9. The bottom of the slewing sling 9 is connected to a lower lifting pole beam through a cross universal joint. The upper lifting pole beam 10 can be used alone or in conjunction with the slewing sling 9, and the slewing sling 9 is a prefabricated component for rotating hoisting.

[0221] A first telescopic mechanism and a second telescopic mechanism are provided between the rotary sling 9 and the lower lifting pole beam to drive the lower lifting pole beam to rotate around a cross universal joint. The lower lifting pole beam sling and the rotary sling 9 are rotationally connected via a cross universal joint. The first telescopic mechanism and the second telescopic mechanism can adjust the posture and angle of the prefabricated component hung on the lower lifting pole beam through their own telescopic movement, thereby facilitating on-site assembly of the prefabricated component.

[0222] It also includes a pier column turning frame 19 and a cushion block 20 used in conjunction with the front hoisting crane 5 and the rear hoisting crane 6. The pier column turning frame 19 includes a base and an "L"-shaped turning frame that turns over on the base. When the bridge erection machine hoists the prefabricated pier column 15 on site, one end of the prefabricated pier column 15 can be supported on the pier column turning frame 19 and the other end can be supported on the cushion block 20. Then, the front hoisting crane 5 and the rear hoisting crane 6 can jointly hoist one end of the prefabricated pier column 15 close to the cushion block 20, so that the other end of the prefabricated pier column 15 is slowly erected under the rotation support of the pier column turning frame 19.

[0223] See also Figures 6 to 9As shown, the second aspect of the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method uses the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method includes the bridge erecting machine self-mounting the bridge, the steps are as follows:

[0224] S11, such as Figure 6 As shown, the single main beam 1 is supported on the ground by the front legs 2 and the rear legs 4, and the middle legs 3 are controlled to move forward and their height from the ground is adjusted so that the middle legs 3 are supported on the top of the rear end of the erected main beam 14, and the bottom of the erected main beam 14 is composed of the constructed foundation 11, the erected pier 12 and the erected cap beam 13 from bottom to top.

[0225] S12, such as Figure 7 As shown, the single main beam 1 is adjusted to be supported by the front support leg 2 and the middle support leg 3, and after the connection between the third supporting column 402 in the rear support leg 4 and the jacking lattice column 403 is released, the jacking lattice column 403, the second jacking frame 404, the support 405 and the second running mechanism 8 are placed on the ground, and the third supporting column 402 is hung on the single main beam 1.

[0226] S13, such as Figure 8 As shown, the third supporting column 402 is controlled to move forward along the length direction of the single main beam 1, and the height of the third supporting column 402 is adjusted so that the third supporting column 402 is supported on the erected main beam 14, and the jacking lattice column 403, the second jacking frame 404, the support 405 and the second running mechanism 8 are moved away synchronously.

[0227] S14, such as Fig. 9 As shown, the single main beam 1 is adjusted to be supported by the front legs 2 and the third supporting column 402, and after the middle legs 3 are emptied, the middle legs 3 are controlled to move forward and support the top of the front end of the erected main beam 14, and the single main beam 1 is adjusted to be supported by the front legs 2 and the middle legs 3, and the third supporting column 402 is emptied, and the front legs 2 drive the single main beam 1 to move forward to the beam erection position, completing the bridge erection machine bridge operation.

[0228] In some alternative embodiments, see Figures 10 to 13 As shown, the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method also includes the bridge erecting machine automatically descending the bridge, the steps are as follows:

[0229] S15, such as Fig.10 As shown, the single main beam 1 is supported by the front legs 2 and the middle legs 3, and the height and width of the third supporting column 402 of the rear legs 4 are contracted to control the third supporting column 402 to pass through the middle legs 3 to reach the front and outside of the erected main beam 14.

[0230] S16, such as Fig.11As shown, the second running mechanism 8 at the bottom of the jacking lattice column 403 is moved, and the second running mechanism 8 synchronously moves the second jacking frame 404 , the jacking lattice column 403 and the support 405 to the bottom of the third supporting column 402 .

[0231] S17, such as Fig.12 As shown, the positions and heights of the third supporting columns 402 and the lifting lattice columns 403 are cooperatively controlled, and the third supporting columns 402 and the lifting lattice columns 403 are connected and fixed via the supports 405 .

[0232] S18, such as Fig.13 As shown, the single main beam 1 is adjusted to be supported by the front legs 2 and the rear legs 4, the middle legs 3 are emptied, and the front legs 2 and the rear legs 4 are controlled to move forward until the bridge erecting machine is located outside the front end of the erected main beam 14, completing the bridge erecting machine's bridge lowering operation.

[0233] In some alternative embodiments, see Figures 14 to 18 As shown, the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method also includes converting the bridge erecting machine from the front leg ground support to the front leg pier support, the steps are as follows:

[0234] S19, such as Fig.14 As shown, the front leg 2 is positioned on the pier in front of the erected main beam 14 (attached Fig.14 The middle support leg 3 and the third support column 402 are supported on the erected main beam 14, and the second running mechanism 8 synchronously moves the second lifting frame 404, the lifting lattice column 403 and the support 405 to the pier column (attached) in front of the erected main beam 14. Fig.14 On the ground in front of Pier N2.

[0235] S20, such as Fig.15 As shown, the second running mechanism 8 or the second lifting frame 404 adjusts the height of the lifting lattice column 403 so that the front end of the single main beam 1 is supported on the lifting lattice column 403 .

[0236] S21, such as Fig.16 As shown, the single main beam 1 is supported by the jacking lattice column 403, the middle support leg 3 and the third supporting column 402, the connection between the two steel lattice frames in the first supporting column 202 of the front support leg 2 is released, the front support leg 2 is decomposed into the front support leg upper part 21 and the front support leg ground part 22, and the pier top support member 23 is installed on the top of the pier column before the erected main beam 14.

[0237] S22, such as Fig.17 As shown, the front leg upper part 21 of the driving front leg 2 moves forward along the single main beam 1 and is connected to the pier top support member 23.

[0238] S23, such as Fig.18As shown, the single main beam 1 is adjusted to be supported by the front leg upper part 21 of the front leg 2, the middle leg 3 and the third supporting column 402, the jacking lattice column 403 is emptied, and the jacking lattice column 403 is removed, and the bridge-building machine completes the state conversion of the front leg 2 from being supported by the ground to being supported by the pier column.

[0239] See also Figures 19 to 22 As shown, the third aspect of the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine installing a prefabricated pier 15 transported on the ground on the ground, the steps are as follows:

[0240] S11, such as Fig.19 As shown, the front legs 2 and the rear legs 4 of the bridge erecting machine are supported on the ground, and the bridge erecting machine is supported at the hole to be installed (attached) by the first running mechanism 7 and the second running mechanism 8. Fig.19 After the ground on both sides of the middle N1 pier is reached, the first running mechanism 7 and the second running mechanism 8 are locked;

[0241] Adjust the support height of the front support leg 2 and the rear support leg 4, and connect the front hoisting crane 5 and the rear hoisting crane 6 to the lifting pole beam 10 through the wire rope and the pulley block; use the beam transport vehicle 18 to transport the prefabricated pier column 15 from the ground to the vicinity of the hole to be installed, one end of the prefabricated pier column 15 is supported on the pier column turning frame 19, and the other end is provided with a pier column lifting lug, and the beam transport vehicle 18 adjusts the position of the prefabricated pier column 15 so that the prefabricated pier column 15 is located directly below the bridge erection machine;

[0242] S12, such as Fig. 20 As shown, the front hoisting trolley 5 and the rear hoisting trolley 6 lower the lifting shoulder beam 10 and connect it with the pier column lifting ears. The front hoisting trolley 5 and the rear hoisting trolley 6 slowly lift the prefabricated pier column 15, move backward while lifting, and slowly lift the prefabricated pier column 15 under the action of the pier column turning frame 19.

[0243] S13, such as Fig.21 As shown, the front hoisting crane 5 and the rear hoisting crane 6 are cooperatively controlled to slowly lift the prefabricated pier column 15 until the prefabricated pier column 15 is in a vertical state.

[0244] S14, such as Fig. 22 As shown, after the prefabricated pier 15 is completely vertical, the prefabricated pier 15 is completely hoisted and the beam transport vehicle 18 is removed. The front hoisting crane 5 and the rear hoisting crane 6 hoist the prefabricated pier 15 to the top of the hole to be installed for alignment installation.

[0245] In some alternative embodiments, see Figure 23 to Figure 26 As shown, the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method also includes the bridge erecting machine installing a prefabricated cap beam 16 transported on the ground on the ground, the steps are as follows:

[0246] S15, such as Fig.23 As shown, the front legs 2 and the rear legs 4 of the bridge erecting machine are supported on the ground, and after the bridge erecting machine is supported on the ground on both sides of the erected pier 12 (N2 pier position in Fu 23) by using the first running mechanism 7 and the second running mechanism 8, the first running mechanism 7 and the second running mechanism 8 are locked;

[0247] Adjust the supporting heights of the front legs 2 and the rear legs 4, install the slewing sling 9 and the lower lifting pole beam on the upper lifting pole beam 10, and use the beam transport vehicle 18 to transport the prefabricated cap beam 16 from the ground to the vicinity of the hole to be installed.

[0248] S16, such as Fig.24 As shown, the beam transport vehicle 18 is driven to rotate the prefabricated cap beam 16 from the longitudinal direction of the bridge to the transverse direction of the bridge in the plane and place it directly below the bridge erecting machine.

[0249] S17, such as Fig.25 As shown, the front crane 5 and the rear crane 6 lower the rotary sling 9 and the lower lifting pole beam to connect with the prefabricated cap beam 16, and slowly lift the prefabricated cap beam 16 so that the bottom of the prefabricated cap beam 16 is higher than the reserved anchor bars 25 of the erected piers.

[0250] S18, such as Fig.26 As shown, the front crane 5 and the rear crane 6 are cooperatively controlled to move, the prefabricated cap beam 16 is lifted to the top of the erected pier 12, and the rotary hoist 9, the first telescopic mechanism and the second telescopic mechanism are driven to accurately adjust the posture of the prefabricated cap beam 16 to align with the top of the erected pier 12 for installation.

[0251] In some alternative embodiments, see Figures 27 to 31 As shown, the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method also includes the bridge erecting machine installing a prefabricated main beam transported on the ground, the steps are as follows:

[0252] S19, such as Fig. 27 As shown, the front legs 2 and the rear legs 4 of the bridge erecting machine are supported on the ground, and the bridge erecting machine is moved across the longitudinal bridge to the adjacent erected pier 12 (attached Fig. 27 The outer side of the middle N1 pier and the N2 pier) is locked with the first running mechanism 7 and the second running mechanism 8;

[0253] Adjust the support height of the front legs 2 and the rear legs 4, and use the beam transport vehicle 18 to transport the prefabricated main beam 17 to the hole position to be erected (attached Fig. 27 Near the middle pier position N1 and pier position N2), along the height direction of the erected pier column 12, the rear end of the prefabricated main beam 17 is located at the rear erected pier column 12 (attached Fig. 27The top of the prefabricated main beam 17 is located below the top of the previously erected pier column (attached Fig. 27 In addition to the top of the middle pier N2, a cap beam 13 has been erected, and their projections in the height direction do not overlap each other.

[0254] S20, such as Fig.28 As shown, the front crane 5 and the rear crane 6 are cooperatively controlled to lift the prefabricated main beam 17; when the rear end of the prefabricated main beam 17 approaches the next erected pier 12 (attached Fig.28 When the bottom of the cap beam 13 is already placed on the top of the pier (N1), the rear crane 6 stops lifting and the front crane 5 continues lifting, so that the front end of the prefabricated main beam 17 is higher than the previous pier column 12 (attached Fig.28 A cap beam 13 has been erected on the top of the middle pier (N2), so that the prefabricated main beam 17 is in an inclined state.

[0255] S21, such as Fig.29 As shown, the front crane 5 and the rear crane 6 are cooperatively controlled to synchronously lift the prefabricated main beam 17 and move it forward, so that the rear end of the prefabricated main beam 17 is located at the rear erected pier 12 (attached Fig.29 The top of the middle pier (N1) has a cap beam 13 on the front side so that the projections in the height direction do not overlap each other.

[0256] S22, such as Fig.30 As shown, the height and position of the front lifting crane 5 are kept unchanged, and the rear lifting crane 6 lifts the prefabricated main beam 17 upward, so that the prefabricated main beam 17 is adjusted from an inclined state to a horizontal state.

[0257] S23, such as Fig.31 As shown, the front crane 5 and the rear crane 6 are coordinated to synchronously hoist the prefabricated main beam 17 and move it backward, and the prefabricated main beam 17 is hoisted to the designed position and lowered and installed on the erected cap beam 13.

[0258] See also Figure 32 to Figure 36 As shown, the fourth aspect of the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine installing the prefabricated piers transported by the bridge deck on the bridge deck, the steps are as follows:

[0259] S11, such as Fig.32 As shown, the front legs 2 of the bridge-building machine are supported on the ground, the middle legs 3 and the third supporting column 402 are supported on the erected main beam 14, and the bridge-building machine is adjusted to a suitable height; the front and rear beam transport vehicles 18 are used to transport the prefabricated piers 15 from the erected main beam 14 to the tail end of the bridge-building machine, so that the front end of the prefabricated piers 15 is located under the front crane 5.

[0260] S12, such as Fig.33As shown, the front crane 5 lifts the prefabricated pier column 15 so that the front end of the prefabricated pier column 15 is hung on the front crane 5, and the rear end of the prefabricated pier column 15 is supported on the rear beam transport vehicle 18. The front beam transport vehicle 18 is removed, and the front crane 5 and the rear beam transport vehicle 18 are cooperatively controlled to move forward so that the rear end of the prefabricated pier column 15 is located at the lifting position of the rear crane 6.

[0261] S13, such as Fig.34 As shown, the rear crane 6 lifts the prefabricated pier column 15, so that the prefabricated pier column 15 is suspended on the front crane 5 and the rear crane 6, and the front crane 5 and the rear crane 6 are controlled to move forward to the hole position to be installed (see FIG. Fig.34 Near the middle pier position N2, the front crane 5 and the rear crane 6 lower the prefabricated pier column 15, so that one end of the prefabricated pier column 15 is supported on the pier column turning frame 19 on the ground, and the other end is supported on the cushion block 20 on the bottom.

[0262] S14, such as Fig.35 As shown, the positions of the front lifting trolley 5 and the rear lifting trolley 6 are adjusted and the upper lifting pole beam 10 is installed. The lifting rope of the upper lifting pole beam 10 is installed on the top of the prefabricated pier column 15 to prepare for lifting. The front lifting trolley 5 and the rear lifting trolley 6 are cooperatively controlled to move backward while lifting, so that the prefabricated pier column 15 is slowly lifted and adjusted from a horizontal state to a vertical state.

[0263] S15, such as Fig.36 As shown, the front crane 5 and the rear crane 6 are controlled in a coordinated manner to vertically lift the prefabricated pier 15 to the hole to be installed (see FIG. Fig.36 Above the middle pier position N2), the prefabricated pier column 15 is installed in position and installed on the constructed foundation 11.

[0264] In some alternative embodiments, see Figures 37 to 40 As shown, the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method comprising the bridge erecting machine installing a prefabricated cap beam 16 transported by the bridge deck on the bridge deck, the steps are as follows:

[0265] S16, such as Fig.37 As shown, the front legs 2 of the bridge erecting machine are supported on the ground, the middle legs 3 and the third supporting column 402 are supported on the erected main beam 14, the bridge erecting machine is adjusted to a suitable height, the positions of the front hoisting trolley 5 and the rear hoisting trolley 6 are adjusted, and the rotary sling 9 and the lower hoisting pole beam are installed on the upper hoisting pole beam 10;

[0266] The prefabricated cap beam 16 is transported from the erected main beam 14 to the tail end of the bridge erecting machine using a beam transport vehicle 18, so that the prefabricated cap beam 16 is located below the slewing hanger 9 and the lower lifting shoulder beam.

[0267] S17, such as Fig.38As shown, after the lower lifting pole beam is connected to the prefabricated cap beam 16, the front lifting trolley 5 and the rear lifting trolley 6 jointly lift the prefabricated cap beam 16 and move it forward, and remove the beam transport vehicle 18.

[0268] S18, such as Fig.39 As shown, the front crane 5 and the rear crane 6 are cooperatively controlled to lift the prefabricated cap beam 16 to the outside of the erected main beam 14, and the orientation of the prefabricated cap beam 16 is adjusted from the longitudinal direction of the bridge to the transverse direction of the bridge by the rotating hoist 9.

[0269] S19, such as Fig.40 As shown, continue to control the front crane 5 and the rear crane 6 to lift the prefabricated cap beam 16 and move it forward to the erected pier 12 (attached Fig.40 Above the middle pier position N2), the posture of the prefabricated cap beam 16 is accurately adjusted to be aligned with the top of the erected pier column 12 by driving the rotary hanger 9, the first telescopic mechanism and the second telescopic mechanism.

[0270] In some alternative embodiments, see Figure 41 to Figure 44 As shown, the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method comprising the bridge erecting machine installing a prefabricated main beam transported by the bridge deck on the bridge deck, the steps are as follows:

[0271] S20, such as Fig.41 As shown, the front legs 2 of the bridge-building machine are supported on the ground, the middle legs 3 and the third supporting column 402 are supported on the erected main beam 14, the bridge-building machine is adjusted to a suitable height, and the front and rear beam transport vehicles 18 are used to transport the prefabricated main beam 17 from the erected main beam 14 to the tail end of the bridge-building machine, so that the front end of the prefabricated main beam 17 is located under the front crane 5.

[0272] S21, such as Fig.42 As shown, the front crane 5 lifts the precast main beam 17 so that the front end of the precast main beam 17 is suspended on the front crane 5 and the rear end is supported on the rear beam transport vehicle 18. The front beam transport vehicle 18 is removed, and the front crane 5 and the rear beam transport vehicle 18 are cooperatively controlled to move forward so that the rear end of the precast main beam 17 is located at the lifting position of the rear crane 6.

[0273] S22, such as Fig.43 As shown, the rear crane 6 lifts the prefabricated main beam 17, so that the prefabricated main beam 17 is suspended on the front crane 5 and the rear crane 6, and the front crane 5 and the rear crane 6 are controlled to move forward to the hole position to be installed (see FIG. Fig.43 Near the N1 and N2 piers).

[0274] S23, such as Fig.44As shown, after controlling the front crane 5 and the rear crane 6 to adjust the prefabricated main beam 17 to the designed position, the front crane 5 and the rear crane 6 lower the prefabricated main beam 17 for alignment installation, and install the prefabricated main beam 17 on the erected cap beam 13.

[0275] See also Figures 45 to 49 As shown, the fifth aspect of the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method using the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method comprising the bridge erecting machine installing a prefabricated main beam for a curved bridge transported by a bridge deck, the steps being as follows:

[0276] S11, such as Fig.45 As shown, the front legs 2 of the bridge-building machine are supported on the ground, the middle legs 3 and the third supporting column 402 are supported on the erected main beam 14, the bridge-building machine is adjusted to the inner side of the curved bridge, and the front and rear beam transporters 18 are used to transport the outermost prefabricated main beam 17 of the curved bridge on the erected main beam 14 to the tail of the bridge-building machine.

[0277] S12, such as Fig.46 As shown, after the front end of the precast main beam 17 reaches the designed lifting position of the front lifting crane 5, the front lifting crane 5 lifts the front end of the precast main beam 17, and the rear end of the precast main beam 17 is supported on the beam transport vehicle 18 at the rear.

[0278] S13, such as Fig.47 As shown, the bridge erection machine is adjusted to be supported by the front legs 2 and the middle legs 3, and the bridge erection machine and the beam transport vehicle 18 are controlled in coordination, and the single main beam 1 is rotated around the slewing mechanism 305 of the middle legs 3 by controlling the first running mechanism 7, so that the prefabricated main beam 17 moves forward while gradually adjusting the angle until it is parallel to the single main beam 1;

[0279] When the rear end of the prefabricated main beam 17 reaches the designed lifting position of the rear lifting crane 6, the rear lifting crane 6 lifts the rear end of the prefabricated main beam 17. At this time, the prefabricated main beam 17 is suspended on the front lifting crane 5 and the rear lifting crane 6.

[0280] S14, such as Fig.48 As shown, the bridge erection machine hoists the prefabricated main beam 17 and moves it horizontally to the designed installation position, lowers it for installation, and completes the erection of the outermost side beams of the curved bridge.

[0281] S15, such as Fig.49 As shown, the above steps S11 to S14 are repeated, and the bridge erection machine and the beam transport vehicle 18 rotate and feed the beams in coordination to complete the installation of the remaining prefabricated main beams 17 from the outer arc to the inner arc direction of the curved bridge.

[0282] See also Figure 50 to Figure 59As shown, the sixth aspect of the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method uses the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method includes the bridge erecting machine crossing the obstacle 24 in front by itself, the obstacle 24 is a roadbed or a built bridge, etc., the steps are as follows:

[0283] S11, such as Fig.50 As shown, the middle leg 3 and the third supporting column 402 of the bridge erecting machine are positioned on the erected main beam 14, and the front leg 2 moves to the vicinity of the front obstacle 24;

[0284] S12, such as Fig.51 As shown, the bridge-building machine is adjusted to be supported by the front legs 2 and the middle legs 3, and after the width and height of the third supporting column 402 are controlled, it moves forward through the middle legs 3 to reach the outside of the erected main beam 14.

[0285] S13, such as Fig.52 As shown, the second running mechanism 8 at the bottom of the lifting lattice column 403 is driven to move the lifting lattice column 403 to below the third supporting column 402 .

[0286] S14, such as Fig.53 As shown, the positions and heights of the third supporting columns 402 and the lifting lattice columns 403 are adjusted by coordinated control, and the third supporting columns 402 and the lifting lattice columns 403 are connected and fixedly connected using the supports 405 to form the rear legs 4.

[0287] S15, such as Fig.54 As shown, the bridge-building machine is adjusted to be supported by the rear legs 4 and the middle legs 3, the connection between the two steel lattice frames in the first supporting column 202 of the front legs 2 is released, and the front legs 2 are decomposed into the front leg upper part 21 and the front leg ground part 22.

[0288] S16, such as Fig.55 As shown, the height of the front leg ground member 22 is lowered, and the front leg ground member 22 is moved to the existing obstacle 24 in front.

[0289] S17, such as Fig.56 As shown, the bridge-building machine is supported by the middle leg 3 and the rear leg 4, driving the second running mechanism 8 at the bottom of the jacking lattice column 403 to move the bridge-building machine forward until the front leg upper part 21 is located above the front leg ground part 22; the position and height of the front leg upper part 21 and the front leg ground part 22 are coordinated to connect and fix the front leg upper part 21 and the front leg ground part 22 to form the front leg 2.

[0290] S18, such as Fig.57 As shown, the bridge-building machine is adjusted to be supported by the front legs 2 and the rear legs 4, and the middle legs 3 are moved forward to support above the obstacle 24.

[0291] S19, such as Fig.58 As shown, the conversion bridge-building machine is supported by the front legs 2 and the middle legs 3, and the bridge-building machine is controlled to move forward and the rear legs 4 are moved to the vicinity of the obstacle 24, and the connection between the third supporting column 402 and the jacking lattice column 403 is released.

[0292] S20, such as Fig.59 As shown, the height of the lifting lattice column 403 is adjusted, the lifting lattice column 403 is moved to the obstacle 24, and the third supporting column 402 and the lifting lattice column 403 are reconnected to form the rear support leg 4.

[0293] S21, adopt the reverse steps of the above S11 to S20 to complete the operation of the bridge erecting machine coming down from the obstacle 24 and completing the operation of the bridge erecting machine crossing the obstacle 24.

[0294] See also Figure 60 to Figure 68 As shown, the seventh aspect of the embodiment of the present application provides a construction method of a lightweight multifunctional bridge erecting machine, the method uses the lightweight multifunctional bridge erecting machine described in any of the above embodiments, the method includes the bridge erecting machine automatically transferring to another site, and the steps are as follows:

[0295] S11, such as Fig.60 As shown, if there is no obstacle in front of the bridge erecting machine and the transfer is short, the first running mechanism 7 and the second running mechanism 8 at the bottom of the front legs 2 and the rear legs 4 can be directly driven to transfer automatically.

[0296] For limited height requirements in front of the bridge erector or long-distance transfer, the following steps can be used for self-transfer:

[0297] S12, such as Fig.61 As shown, the bridge-building machine is adjusted to be supported by the front legs 2 and the rear legs 4, and the front legs 2 and the rear legs 4 are lowered to the lowest height.

[0298] S13, such as Fig.62 As shown, the middle leg 3 is extended to its longest length, the bridge erecting machine is adjusted to be supported by the front leg 2 and the middle leg 3, the connection between the third supporting column 402 of the rear leg 4 and the jacking lattice column 403 is released, and the jacking lattice column 403 is removed.

[0299] S14, such as Fig.63 As shown, the bridge-building machine is supported by the front legs 2 and the middle legs 3, and the third supporting column 402 is longitudinally moved to the vicinity of the front legs 2, and the heights of the front legs 2 and the middle legs 3 continue to decrease.

[0300] S15, such as Fig.64 As shown, adjust the height of the third supporting column 402, adjust the bridge-building machine to be supported by the middle leg 3 and the third supporting column 402, release the connection between the front leg 2 and the single main beam 1, and remove the front leg 2.

[0301] S16, such as Fig.65As shown, the bridge erecting machine is supported by the middle leg 3 and the third supporting column 402, and the middle leg 3 and the third supporting column 402 continue to reduce the height of the single main beam 1;

[0302] S17, such as Fig.66 As shown, two beam transport vehicles 18 are respectively arranged under the first single main beam segment 101, the second single main beam segment 102 and the third single main beam segment 103 of the bridge-building machine, and the middle support leg 3 and the third supporting column 402 continue to lower the height of the single main beam 1 until the first single main beam segment 101, the second single main beam segment 102 and the third single main beam segment 103 of the single main beam are all supported on the beam transport vehicle 18.

[0303] S18, such as Fig.67 As shown, the bridge erecting machine is supported by the beam transport vehicle 18, and the middle support leg 3 and the third supporting column 402 continue to shorten or flip upward until they are off the ground.

[0304] S19, such as Fig.68 As shown, the quick connection device 104 between the first single main beam segment 101, the second single main beam segment 102 and the third single main beam segment 103 is released, so that the first single main beam segment 101, the second single main beam segment 102 and the third single main beam segment 103 of the single main beam 1 are disconnected from each other, and each single main beam segment is transported in sections by the beam transport vehicle 18, completing the long-distance rapid transfer operation of the bridge erection machine.

[0305] How it works

[0306] The embodiment of the present application provides a lightweight multifunctional bridge-building machine and a construction method. The lightweight multifunctional bridge-building machine of the present application is provided with a single main beam 1, on which a front lifting trolley 5 and a rear lifting trolley 6 are slidably connected; a front support leg 2, the top of which is slidably connected to the single main beam 1, and the supporting height of the single main beam 1 is vertically adjusted, and the bottom of the front support leg 2 is connected to a first running mechanism 7; a middle support leg 3, which is slidably connected to the single main beam 1, and the supporting height of the single main beam 1 is vertically adjusted; a rear support leg 4, the top of which is slidably connected to the single main beam 1, and the supporting height of the single main beam 1 is vertically adjusted, and the bottom of the rear support leg 4 is connected to a second running mechanism 8.

[0307] Therefore, the front legs 2, middle legs 3 and rear legs 4 of the lightweight multifunctional bridge-building machine applied for can not only move along the length direction of the single main beam 1, but also the telescopic movements of the front legs 2, middle legs 3 and rear legs 4 can support the single main beam 1 to a set height, and the support conversion between each other can meet different construction scenarios of the bridge-building machine. The bottoms of the front legs 2 and the rear legs 4 are respectively connected to the first running mechanism 7 and the second running mechanism 8, which can actively drive the front legs 2, the rear legs 4 and the bridge-building machine to turn and move to adapt to different construction scenarios.

[0308] The bridge-building machine of the present application can realize the overall operations of getting on and off the bridge, crossing obstacles, etc., and can meet the erection operations of prefabricated piers 15, prefabricated cap beams 16, and prefabricated main beams 17 in scenes such as the ground and the bridge deck, and realize the installation of multiple types of bridge components with one machine. The front legs 2 and rear legs 4 of the bridge-building machine are assembled using a standard modular steel lattice frame, which can greatly adjust the height of the bridge-building machine, improve the adaptability of the bridge-building machine, and reduce the size and weight of the bridge-building machine. At the same time, based on the segmented setting of the single main beam 1, the bridge-building machine can be disassembled on site and quickly transferred to another site with the help of a beam transporter 18, meeting the needs of prefabricated bridge construction in complex urban environments.

[0309] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0310] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0311] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A lightweight multifunctional bridge erecting machine, characterized in that: include: A single main beam (1), a front lifting trolley (5) and a rear lifting trolley (6) being slidably connected to the single main beam (1); A front support leg (2), the top of the front support leg (2) being slidably connected to the single main beam (1) and vertically adjusting the support height of the single main beam (1), and the bottom of the front support leg (2) being connected to a first running mechanism (7); A middle support leg (3), the top of which is slidably connected to the single main beam (1) and vertically adjusts the support height of the single main beam (1); A rear support leg (4), the top of which is slidably connected to the single main beam (1) and vertically adjusts the support height of the single main beam (1), and the bottom of the rear support leg (4) is connected to a second running mechanism (8).

2. A lightweight multifunctional bridge erecting machine as claimed in claim 1, characterized in that: The single main beam (1) comprises a plurality of detachably connected single main beam segments, and the plurality of single main beam segments are sequentially extended to form the single main beam (1); The top of the single main beam (1) is provided with an upper slide rail slidably connected to the front supporting legs (2) and the middle supporting legs (3), and the bottom of the single main beam (1) is provided with a lower slide rail slidably connected to the rear supporting legs (4), the front lifting trolley (5) and the rear lifting trolley (6).

3. A lightweight multifunctional bridge erecting machine as claimed in claim 2, characterized in that: The multiple sections of the single main beam segments are connected by a quick connection device (104), the quick connection device (104) comprising a plug and a socket that are inserted and removed from each other between two adjacent sections of the single main beam segments, and a cylindrical pin is inserted between the plug and the socket; The bridge erecting machine is equipped with a beam transport vehicle (18) for transporting single main beam segments, prefabricated piers (15), prefabricated cap beams (16), and prefabricated main beams (17).

4. A lightweight multifunctional bridge erecting machine as claimed in claim 1 or 2, characterized in that: The front support leg (2) comprises a first variable width cross beam (201) sliding on the single main beam (1), and the bottoms of both ends of the first variable width cross beam (201) are connected to first support columns (202) with adjustable heights; The first supporting column (202) comprises a plurality of steel lattice frames which are connected in sequence, and a first lifting frame (203) for lifting the first supporting column (202) is provided on the top of the first running mechanism (7) for lifting and lowering the first supporting column (202).

5. A lightweight multifunctional bridge erecting machine as claimed in claim 1 or 2, characterized in that: The middle support leg (3) comprises a second variable width cross beam (303) slidably connected to the single main beam (1), and the bottoms of both ends of the second variable width cross beam (303) are connected to second support columns (301) with adjustable heights; A transverse track (306) is slidably disposed at the bottom of the second supporting column (301), and the second variable-width crossbeam (303), the second supporting column (301) and the transverse track (306) form a rectangular structure; A slewing mechanism (305) for driving the middle leg (3) to rotate is connected between the second variable-width cross beam (303) and the single main beam (1).

6. A lightweight multifunctional bridge erecting machine as claimed in claim 1 or 2, characterized in that: The rear support leg (4) comprises a third support leg cross beam (401) sliding on the single main beam (1), and the bottoms of both ends of the third support leg cross beam (401) are connected to third support columns (402) with adjustable height; The bottom of the third supporting column (402) is detachably connected to a lifting lattice column (403) via a support (405), and the lifting lattice column (403) includes a plurality of steel lattice frames connected in sequence; A second lifting frame (404) for lifting the lifting lattice column (403) and the third supporting column (402) is provided between the bottom of the lifting lattice column (403) and the top of the second running mechanism (8).

7. A lightweight multifunctional bridge erecting machine as claimed in claim 1, characterized in that: The bottoms of the front lifting trolley (5) and the rear lifting trolley (6) are connected to an upper lifting pole beam (10) via a steel wire rope and a pulley block, and the middle of the upper lifting pole beam (10) is connected to a rotary sling (9); The bottom of the rotary sling (9) is connected to a lower lifting pole beam via a cross universal joint, and a first telescopic mechanism and a second telescopic mechanism for driving the lower lifting pole beam to rotate around the cross universal joint are provided between the rotary sling (9) and the lower lifting pole beam sling.

8. A lightweight multifunctional bridge erecting machine as claimed in claim 1, characterized in that: It also includes a pier column turning frame (19) and a cushion block (20) used in conjunction with the front lifting trolley (5) and the rear lifting trolley (6). The pier column turning frame (19) includes a base and an "L"-shaped turning frame that turns on the base.

9. A construction method of a lightweight multifunctional bridge erecting machine, characterized in that: The method uses the lightweight multifunctional bridge erecting machine according to any one of claims 1 to 8, and the method includes the bridge erecting machine going up the bridge by itself, and the steps are as follows: The single main beam (1) is supported on the ground by the front supporting legs (2) and the rear supporting legs (4), and the middle supporting legs (3) are controlled to move forward and their height from the ground is adjusted so that the middle supporting legs (3) are supported on the top of the rear end of the erected main beam (14); The single main beam (1) is adjusted to be supported by the front supporting legs (2) and the middle supporting legs (3), and the connection between the third supporting column (402) in the rear supporting legs (4) and the jacking lattice column (403) is released; Control the third supporting column (402) to move forward, adjust the height of the third supporting column (402), make the third supporting column (402) support the erected main beam (14), and remove the jacking lattice column (403); The single main beam (1) is adjusted to be supported by the front supporting legs (2) and the third supporting column (402), and after the middle supporting legs (3) are vacated, the middle supporting legs (3) are controlled to move forward and support the top of the front end of the erected main beam (14); The single main beam (1) is adjusted to be supported by the front supporting legs (2) and the middle supporting legs (3), the third supporting column (402) is vacated, and the front supporting legs (2) drive the single main beam (1) to move forward to the beam erection position, thereby completing the bridge erection machine bridge operation.

10. A construction method for a lightweight multifunctional bridge erecting machine as claimed in claim 9, characterized in that: The method also includes the following steps: The single main beam (1) is supported by the front supporting legs (2) and the middle supporting legs (3), the third supporting column (402) of the rear supporting legs (4) is shrunk in height and width, and the third supporting column (402) is controlled to pass through the middle supporting legs (3) and reach the outside of the erected main beam (14); The second running mechanism (8) at the bottom of the lifting lattice column (403) is moved, and the second running mechanism (8) moves the lifting lattice column (403) to below the third supporting column (402); The positions and heights of the third supporting column (402) and the lifting lattice column (403) are controlled in coordination, and the third supporting column (402) and the lifting lattice column (403) are connected and fixed via the support (405); The single main beam (1) is adjusted to be supported by the front legs (2) and the rear legs (4), the middle legs (3) are vacated, and the front legs (2) and the rear legs (4) are controlled to move forward until the bridge erection machine is located outside the front end of the erected main beam (14), thereby completing the bridge erection machine's bridge lowering operation.

11. A construction method of a lightweight multifunctional bridge erecting machine as claimed in claim 9, characterized in that: The method further comprises converting the bridge erecting machine from the front legs (2) being supported on the ground to being supported on pier columns, the steps being as follows: The front support leg (2) is positioned on the ground at the rear side of the pier before the erected main beam (14), the middle support leg (3) and the third support column (402) are supported on the erected main beam (14), and the second running mechanism (8) moves the jacking lattice column (403) to the ground at the front side of the pier before the erected main beam (14); Adjusting the height of the lifting lattice column (403) so that the front end of the single main beam (1) is supported on the lifting lattice column (403); The single main beam (1) is supported by the jacking lattice column (403), the middle support leg (3) and the third support column (402), the connection between the two steel lattice frames in the first support column (202) of the front support leg (2) is released, the front support leg (2) is decomposed into the front support leg upper part (21) and the front support leg ground part (22), and the pier top support member (23) is installed on the top of the pier column before the erected main beam (14); The front leg upper part (21) of the front leg (2) is driven to move forward along the single main beam (1) and to be connected to the pier top support part (23); The single main beam (1) is adjusted to be supported by the front leg upper part (21), the middle leg (3) and the third supporting column (402) of the front leg (2), the jacking lattice column (403) is emptied, and the jacking lattice column (403) is removed, and the bridge erecting machine completes the state conversion of the front leg (2) from ground support to support by the pier column.

12. A construction method of a lightweight multifunctional bridge erecting machine, characterized in that: The method uses the lightweight multifunctional bridge erecting machine according to any one of claims 1 to 8, and the method comprises the following steps: The front legs (2) and the rear legs (4) of the bridge erecting machine are both supported on the ground. After the bridge erecting machine is supported on the ground on both sides of the hole to be installed by using the first running mechanism (7) and the second running mechanism (8), the first running mechanism (7) and the second running mechanism (8) are locked; The support heights of the front support legs (2) and the rear support legs (4) are adjusted, and the front hoisting trolley (5) and the rear hoisting trolley (6) are connected to the lifting pole beam (10) via steel wire ropes and pulley blocks; The prefabricated pier column (15) is transported to the vicinity of the hole to be installed by using a beam transport vehicle (18), one end of the prefabricated pier column (15) is supported on a pier column turning frame (19), and a pier column lifting lug is arranged on the other end, and the beam transport vehicle (18) adjusts the position of the prefabricated pier column (15) so that the prefabricated pier column (15) is located directly below the bridge erecting machine; The front hoisting crane (5) and the rear hoisting crane (6) lower the lifting pole beam (10) and connect it with the pier column lifting lugs. The front hoisting crane (5) and the rear hoisting crane (6) slowly lift the prefabricated pier column (15), move backwards while lifting, and slowly lift the pier column under the action of the pier column turning frame (19); After the prefabricated pier column (15) is completely lifted vertically, the beam transport vehicle (18) is removed, and the front hoisting crane (5) and the rear hoisting crane (6) lift the prefabricated pier column (15) to the top of the hole to be installed for alignment installation.

13. A construction method for a lightweight multifunctional bridge erecting machine as claimed in claim 12, characterized in that: The method further comprises installing the prefabricated cap beam (16) transported on the ground by a bridge erecting machine, the steps being as follows: The front legs (2) and the rear legs (4) of the bridge erecting machine are supported on the ground, and after the bridge erecting machine is supported on the ground on both sides of the erected pier column by using the first running mechanism (7) and the second running mechanism (8), the first running mechanism (7) and the second running mechanism (8) are locked; Adjust the support heights of the front legs (2) and the rear legs (4), and install the slewing sling (9) and the lower lifting pole beam on the upper lifting pole beam (10); Using a beam transport vehicle (18) to transport the prefabricated cap beam (16) to the vicinity of the hole to be installed; The beam transport vehicle (18) is driven to rotate the prefabricated cap beam (16) from the longitudinal direction of the bridge to the transverse direction of the bridge in a plane and is placed directly below the bridge erecting machine; The front hoisting crane (5) and the rear hoisting crane (6) lower the rotary sling (9) and the lower hoisting shoulder beam to connect with the prefabricated cap beam (16), and slowly lift the prefabricated cap beam (16) so that the bottom of the prefabricated cap beam (16) is higher than the reserved anchor steel bars of the erected pier column; Coordinately control the movement of the front crane (5) and the rear crane (6) to lift the prefabricated cap beam (16) to the top of the erected pier column; The rotary hanger, the first telescopic mechanism and the second telescopic mechanism are driven to accurately adjust the posture of the prefabricated cap beam (16) so that it can be aligned with the top of the erected pier column for installation.

14. A construction method for a lightweight multifunctional bridge erecting machine as claimed in claim 13, characterized in that: The method further comprises installing the prefabricated main beam (17) transported on the ground by a bridge erecting machine, the steps being as follows: The front legs (2) and the rear legs (4) of the bridge erecting machine are supported on the ground, and the bridge erecting machine is straddled on the outer side of the adjacent erected piers in the longitudinal direction of the bridge by using the first running mechanism (7) and the second running mechanism (8), and the first running mechanism (7) and the second running mechanism (8) are locked; Adjusting the support height of the front supporting legs (2) and the rear supporting legs (4); The prefabricated main beam (17) is transported to the vicinity of the hole to be erected by using a beam transport vehicle (18), and along the height direction of the erected pier, the rear end of the prefabricated main beam (17) is located below the erected cap beam at the top of the next erected pier, and the front end of the prefabricated main beam (17) is located outside the erected cap beam at the top of the previous erected pier; Coordinately controlling the front hoisting crane (5) and the rear hoisting crane (6) to jointly lift the prefabricated main beam (17); When the rear end of the prefabricated main beam (17) approaches the bottom of the cap beam installed on the top of the next erected pier, the rear crane stops lifting and the front crane (5) continues lifting, so that the front end of the prefabricated main beam (17) is higher than the cap beam installed on the top of the previous erected pier, so that the prefabricated main beam (17) is in an inclined state; Control the front crane (5) and the rear crane (6) to move forward so that the rear end of the prefabricated main beam (17) is located outside the front side of the cap beam that has been erected on the top of the next erected pier column; The height and position of the front lifting crane (5) are kept unchanged, and the rear lifting crane (6) lifts the prefabricated main beam (17) so that the prefabricated main beam (17) is adjusted from an inclined state to a horizontal state; The front crane (5) and the rear crane (6) are coordinated to move backwards, and the prefabricated main beam (17) is hoisted to the designed position for lowering and alignment installation.

15. A construction method of a lightweight multifunctional bridge erecting machine, characterized in that: The method uses the lightweight multifunctional bridge erecting machine according to any one of claims 1 to 8, and the method comprises the following steps: the bridge erecting machine installs the prefabricated piers (15) transported by the bridge deck on the bridge deck: The front legs (2) of the bridge erecting machine are supported on the ground, the middle legs (3) and the third supporting column (402) are supported on the erected main beam (14), and the bridge erecting machine is adjusted to a suitable height; Using two front and rear beam transport vehicles (18) to transport the prefabricated pier column (15) from the erected main beam (14) to the rear of the bridge erecting machine, so that the front end of the prefabricated pier column (15) is located below the front crane (5); The front crane (5) lifts the prefabricated pier column (15), so that the front end of the prefabricated pier column (15) is suspended on the front crane (5), and the rear end is supported on the rear beam transport vehicle (18), and the front beam transport vehicle (18) is removed; The front crane (5) and the beam transport vehicle (18) at the rear are cooperatively controlled to move forward so that the rear end of the prefabricated pier column (15) is located at the lifting position of the rear crane (6); The rear lifting trolley (6) lifts the prefabricated pier column (15), so that the prefabricated pier column (15) is suspended on the front lifting trolley (5) and the rear lifting trolley (6), and the front lifting trolley (5) and the rear lifting trolley (6) are controlled to move forward to the vicinity of the hole to be installed; The front crane (5) and the rear crane (6) lower the prefabricated pier column (15), so that one end of the prefabricated pier column (15) is supported on a pier column turning frame (19) on the ground, and the other end is supported on a cushion block (20) on the bottom surface; The positions of the front hoisting crane (5) and the rear hoisting crane (6) are adjusted and the upper hoisting pole beam (10) is installed. The hoisting rope of the upper hoisting pole beam (10) is installed on the top of the prefabricated pier column (15) to prepare for hoisting; The front crane (5) and the rear crane (6) are cooperatively controlled to lift and move backwards together, so that the prefabricated pier (15) is slowly lifted and adjusted from a horizontal state to a vertical state; The front hoisting crane (5) and the rear hoisting crane (6) are cooperatively controlled to vertically lift the prefabricated pier column (15) to the top of the hole to be installed for alignment installation.

16. A construction method for a lightweight multifunctional bridge erecting machine as claimed in claim 15, characterized in that: The method comprises the following steps: installing a prefabricated cap beam (16) transported by the bridge deck on the bridge deck by a bridge erecting machine: The front legs (2) of the bridge erecting machine are supported on the ground, the middle legs (3) and the third supporting column (402) are supported on the erected main beam (14), and the bridge erecting machine is adjusted to a suitable height; Adjust the positions of the front hoisting crane (5) and the rear hoisting crane (6), and install the rotary sling (9) and the lower hoisting pole beam on the upper hoisting pole beam (10); Using a beam transport vehicle (18) to transport the prefabricated cap beam (16) from the erected main beam (14) to the rear of the bridge erection machine, so that the prefabricated cap beam (16) is located below the rotary sling (9) and the lower lifting pole beam; After the lower lifting pole beam is connected to the prefabricated cap beam (16), the front lifting trolley (5) and the rear lifting trolley (6) lift the prefabricated cap beam (16) and move the beam transport vehicle (18); The front crane (5) and the rear crane (6) are cooperatively controlled to lift the prefabricated cap beam (16) to the outside of the erected main beam (14), and the prefabricated cap beam (16) is adjusted from the longitudinal direction of the bridge to the transverse direction of the bridge by means of a rotating lifting device; Continue to control the front crane (5) and the rear crane (6) to lift the prefabricated cap beam (16) and move it forward to the top of the erected pier column; The rotary hanger, the first telescopic mechanism and the second telescopic mechanism are driven to accurately adjust the posture of the prefabricated cap beam (16) so that it can be aligned with the top of the erected pier column for installation.

17. A construction method for a lightweight multifunctional bridge erecting machine as claimed in claim 16, characterized in that: The method comprises the following steps: a bridge erecting machine installs a prefabricated main beam (17) transported by the bridge deck on the bridge deck: The front legs (2) of the bridge erecting machine are supported on the ground, the middle legs (3) and the third supporting column (402) are supported on the erected main beam (14), and the bridge erecting machine is adjusted to a suitable height; Using two front and rear beam transport vehicles (18) to transport the prefabricated main beam (17) from the erected main beam (14) to the rear of the bridge erecting machine, so that the front end of the prefabricated main beam (17) is located below the front crane (5); The front crane (5) lifts the prefabricated main beam (17), so that the front end of the prefabricated main beam (17) is suspended on the front crane (5), and the rear end is supported on the rear beam transport vehicle (18), and the front beam transport vehicle (18) is removed; The front crane (5) and the beam transport vehicle (18) at the rear are cooperatively controlled to move forward so that the rear end of the prefabricated main beam (17) is located at the lifting position of the rear crane (6); The rear lifting trolley (6) lifts the prefabricated main beam (17), so that the prefabricated main beam (17) is suspended on the front lifting trolley (5) and the rear lifting trolley (6), and the front lifting trolley (5) and the rear lifting trolley (6) are controlled to move forward to the vicinity of the hole to be installed; After the front hoisting crane (5) and the rear hoisting crane (6) are controlled to adjust the prefabricated main beam (17) to the designed position, the front hoisting crane (5) and the rear hoisting crane (6) lower the prefabricated main beam (17) for alignment installation.

18. A construction method of a lightweight multifunctional bridge erecting machine, characterized in that: The method uses the lightweight multifunctional bridge erecting machine according to any one of claims 1 to 8, and the method comprises the following steps: The front legs (2) of the bridge erecting machine are supported on the ground, the middle legs (3) and the third supporting column (402) are supported on the erected main beam (14), and the bridge erecting machine is adjusted to the inner side of the curved bridge; Using two front and rear beam transport vehicles (18) to transport the outermost prefabricated main beam (17) of the curved bridge on the erected main beam (14) to the rear of the bridge erecting machine; After the front end of the prefabricated main beam (17) reaches the designed lifting position of the front lifting crane (5), the front lifting crane (5) lifts the front end of the prefabricated main beam (17), and the rear end of the prefabricated main beam (17) is supported on the rear beam transport vehicle (18); The bridge erection machine is adjusted to be supported by the front legs (2) and the middle legs (3), and the bridge erection machine and the beam transport vehicle (18) are controlled in coordination, and the single main beam (1) is rotated around the slewing mechanism (305) of the middle legs (3) by controlling the first running mechanism (7), so that the prefabricated main beam (17) moves forward while gradually adjusting the angle until it is parallel to the single main beam (1); When the rear end of the prefabricated main beam (17) reaches the designed lifting position of the rear lifting trolley (6), the rear lifting trolley (6) lifts the rear end of the prefabricated main beam (17), and at this time, the prefabricated main beam (17) is suspended on the front lifting trolley (5) and the rear lifting trolley (6); The bridge erection machine hoists the prefabricated main beam (17) and moves it horizontally to the designed installation position, lowers it for installation, and completes the installation of the outermost side beam; Repeat the above steps, the bridge erection machine and the beam transport vehicle (18) rotate and feed the beams in coordination, and complete the installation of the remaining prefabricated main beams (17) from the outer arc to the inner arc direction of the curved bridge.

19. A construction method for a lightweight multifunctional bridge erecting machine, characterized in that: The method uses the lightweight multifunctional bridge-building machine according to any one of claims 1 to 8, and the method includes the bridge-building machine crossing the obstacle (24) in front by itself, and the steps are as follows: The front legs (2) of the bridge erecting machine are moved to the vicinity of the front obstacle (24), and the bridge erecting machine is adjusted to be supported by the front legs (2) and the middle legs (3). After the width and height of the third supporting column (402) are controlled, the bridge erecting machine is moved forward through the middle legs (3) to reach the outside of the erected main beam (14); Driving the second running mechanism (8) at the bottom of the lifting lattice column (403) to move the lifting lattice column (403) to below the third supporting column (402); Coordinated control is used to adjust the position and height of the third supporting column (402) and the lifting lattice column (403), and the third supporting column (402) and the lifting lattice column (403) are connected and fixed using a support (405) to form a rear support leg (4); The bridge erecting machine is adjusted to be supported by the rear legs (4) and the middle legs (3), the connection between the two steel lattice frames in the first supporting column (202) of the front legs (2) is released, and the front legs (2) are decomposed into the front legs upper part (21) and the front legs ground part (22); Lowering the height of the front leg ground component (22) and moving the front leg ground component (22) to the existing obstacle (24) in front; The bridge erecting machine is supported by the middle legs (3) and the rear legs (4), driving the second running mechanism (8) at the bottom of the jacking lattice column (403) to move the bridge erecting machine forward until the front leg upper part (21) is located above the front leg ground part (22); Coordinately controlling the position and height of the front leg upper component (21) and the front leg ground component (22), and connecting and fixing the front leg upper component (21) and the front leg ground component (22) to form the front leg (2); The bridge erecting machine is adjusted to be supported by the front legs (2) and the rear legs (4), and the middle legs (3) are moved forward to support above the obstacle (24); The conversion bridge erection machine is supported by the front legs (2) and the middle legs (3), and the bridge erection machine is controlled to move forward and move the rear legs (4) to the vicinity of the obstacle (24), thereby releasing the connection between the third supporting column (402) and the jacking lattice column (403); Adjusting the height of the lifting lattice column (403), moving the lifting lattice column (403) to the obstacle (24), and reconnecting the third supporting column (402) and the lifting lattice column (403) to form a rear support leg (4); Adopt the above-mentioned reverse steps to complete the bridge erecting machine coming down from the obstacle (24), and complete the operation of the bridge erecting machine crossing the obstacle (24).

20. A construction method of a lightweight multifunctional bridge erecting machine, characterized in that: The method uses the lightweight multifunctional bridge erecting machine according to any one of claims 1 to 8, and the method includes the bridge erecting machine automatically transferring to another site, and the steps are as follows: If there is no obstacle (24) in front of the bridge erecting machine and the transfer is short, the first running mechanism (7) and the second running mechanism (8) at the bottom of the front supporting leg (2) and the rear supporting leg (4) can be directly driven to transfer automatically; For bridge erection machine with limited height requirements or long-distance transfer, the following steps can be used for self-transfer: The bridge erecting machine is adjusted to be supported by the front legs (2) and the rear legs (4), and the front legs (2) and the rear legs (4) are lowered to the lowest height; Extend the middle leg (3) to its longest length, adjust the bridge erecting machine to be supported by the front leg (2) and the middle leg (3), release the connection between the third supporting column (402) of the rear leg (4) and the jacking lattice column (403), and remove the jacking lattice column (403); The bridge erecting machine is supported by the front legs (2) and the middle legs (3), the third supporting column (402) is longitudinally moved to the vicinity of the front legs (2), and the heights of the front legs (2) and the middle legs (3) are further lowered; Adjust the height of the third supporting column (402), adjust the bridge erection machine to be supported by the middle supporting leg (3) and the third supporting column (402), release the connection between the front supporting leg (2) and the single main beam (1), and remove the front supporting leg (2); The bridge erection machine is supported by a middle support leg (3) and a third support column (402), and two beam transport vehicles (18) are arranged below each single main beam section under the bridge erection machine. The middle support leg (3) and the third support column (402) continue to lower the height of the single main beam (1) until the single main beam (1) is supported on the beam transport vehicle (18); The bridge erecting machine is supported by the beam transport vehicle (18), and the middle support leg (3) and the third support column (402) continue to shorten or turn upward until they are off the ground; The connection between the single main beam segments is released, so that the single main beam (1) is decomposed into a plurality of single main beam segments, and each single main beam segment is transported in sections by a beam transport vehicle (18), thereby completing the long-distance rapid transfer operation of the bridge erecting machine.

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