Beam erecting machine for mounting suspension bridge steel girder and construction method using same

Abstract

The invention discloses a girder erection machine for mounting a steel girder of a suspension bridge and a construction method using the girder erection machine. The girder erection machine comprises a main truss mechanism, a supporting mechanism, a hoisting mechanism and a walking mechanism, and the supporting mechanism comprises a front supporting leg, a middle supporting leg and a rear supporting leg which are sequentially arranged at the bottom of the main truss mechanism from front to back; the front supporting leg comprises a front supporting leg part and a front cross beam which are sequentially arranged from top to bottom, the front supporting leg part is of a length-adjustable retractable structure, the top of the front supporting leg part is hinged to the front portion of the bottom face of the main truss mechanism, and the bottom of the front supporting leg part is fixedly connected with the top face of the front cross beam. The top face of the front cross beam is further detachably connected with a permanent suspender of the suspension bridge through a pin shaft, the hoisting mechanism is movably arranged on the top of the main truss mechanism through a crown block, and the lower portion of the hoisting mechanism is connected with a rotary lifting appliance. The problems that a front supporting leg structure of an existing bridge girder erection machine is not suitable for suspension bridge erection, and an existing lifting appliance is generally a fixed lifting appliance and cannot adjust the direction and the lifting angle of a lifting component are solved.

Description

Technical Field

[0001] The invention relates to the field of bridge erection devices, in particular to a beam erection machine used for installing a steel main beam of a suspension bridge and a construction method using the same. Background Art

[0002] In the existing bridge construction process, a bridge erection machine is usually used to build the bridge. The bridge erection machine has a simple structure and is easy to use. It is usually composed of a main truss, front legs, middle legs, rear legs and a lifting mechanism. The front legs, middle legs and rear legs are respectively arranged at the front, middle and rear of the bottom surface of the main truss.

[0003] The existing bridge erection machine has the following main problems when in use. The first is that the bridge erection machine in the prior art is mainly used for ordinary bridge construction rather than suspension bridge. When an ordinary bridge is erected, the front support leg moves forward with the main truss to a predetermined position, and the bottom is connected to the pier to play a supporting role. However, a suspension bridge has no piers when erected. Therefore, it is necessary to improve the front support mechanism of the existing bridge erection machine to adapt to the erection of the suspension bridge, so that it can bear the weight of the bridge erection machine together with the middle support leg when the steel truss beam section is installed. The second is that the sling structure in the prior art is simple, and it is not easy to be installed. The connection to the winch is also a fixed one, so during the lifting process, the components can only be in a horizontal state, and the lifting direction and angle of the frame cannot be adjusted. In this way, the components may be obstructed due to the setting of some construction auxiliary facilities during the lifting process, which will slow down the construction progress. Moreover, after being lifted to the designated position, the components will shake, and the fixed lifting equipment cannot affect the shaking and adjust it in time. Therefore, not only is the stability during the lifting process poor, but also the shaking cannot be adjusted and prevented in time after being lifted to the designated position, affecting the construction efficiency. Summary of the invention

[0004] The object of the present invention is to provide a beam erecting machine for installing the steel main beam of a suspension bridge and a construction method using the same, so as to solve the problems that the front support leg structure of the existing bridge erecting machine is not suitable for the erection of suspension bridges and that the existing hoisting tools are generally fixed hoists that cannot adjust the direction and hoisting angle of the hoisted components.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A beam erecting machine for installing steel main beams of a suspension bridge and a construction method using the same, comprising a main truss mechanism, a supporting mechanism, a lifting mechanism and a traveling mechanism, wherein the supporting mechanism comprises a front leg, a middle leg and a rear leg which are sequentially arranged at the bottom of the main truss mechanism from front to back, the front leg comprises a front leg portion and a front cross beam which are sequentially arranged from top to bottom, the front leg portion is a retractable structure with adjustable length, the top of the front leg portion is hinged to the front portion of the bottom surface of the main truss mechanism, the bottom of the front leg portion is fixedly connected to the top surface of the front cross beam, the top surface of the front cross beam is also detachably connected to the permanent hanger of the suspension bridge via a pin shaft, the lifting mechanism is arranged on the top of the main truss mechanism by means of an overhead crane, and the lower part of the lifting mechanism is connected to a rotating hanger.

[0006] A front crossbeam is arranged between the front supporting legs, and the top surface of the front crossbeam can be detachably connected to the permanent hanger of the suspension bridge through a pin shaft, thus utilizing the permanent hanger of the suspension bridge to make it a front fulcrum support. When the bridge erection machine is erecting the beam, this structure and the middle supporting leg together constitute a simply supported system, which can jointly bear the weight of the bridge erection machine when erecting the beam, thereby increasing the lifting capacity. Since the lengths of the permanent hangers of the suspension bridge are inconsistent, the height of the front crossbeam needs to be adjusted, and the adjustment of the height of the front crossbeam is achieved by adjusting the length of the front supporting leg, which has good adaptability. In order to be able to adjust the direction and lifting angle of the lifting component, a rotating hoist is arranged, through which the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, the component can be quickly stabilized after lifting, and the efficiency is higher.

[0007] As a further preferred embodiment of the present invention, the main truss mechanism adopts a triangular truss structure, the upper and lower chords of the main truss mechanism adopt double H-shaped steel, the web members and diagonal members adopt rectangular tubes, the entire section of the main truss mechanism is transported to the site for assembly, and the connection parts of the main cross mechanism sections are connected by a stable connection mechanism.

[0008] The main truss structure is 54m long, 5.3m high and 2.0m wide at the center. The main truss structure adopts 8m / segment, and the center distance between the two main trusses of the main truss structure is 20m.

[0009] As a further preferred embodiment of the present invention, the stabilizing connection mechanism includes an end plate and a nut connecting pad, the end plate is arranged at the end faces of the upper chord and the lower chord of the main truss mechanism, and the nut connecting pad is arranged on the side walls of the upper chord and the lower chord of the main truss mechanism, the nut connecting pad is arranged in a direction perpendicular to the side walls of the upper chord and the lower chord of the main truss mechanism, the nut connecting pad is arranged close to the end plate, and the segments of two adjacent main truss mechanisms are detachably connected by a screw rod arranged in the middle of the nut connecting pad and nuts at both ends of the screw rod.

[0010] The top surface of the end plate on the upper chord is flush with the top surface of the upper chord; there are no less than three screws connected to each nut connection pad from top to bottom; since the end plates are arranged at the end surfaces of the upper chord and the lower chord of the main truss mechanism, the contact surface between the two main truss mechanism segments has a high degree of flatness, and then nut pads are arranged on the side walls of the upper chord and the lower chord of the main truss mechanism, and the two adjacent main truss mechanism segments can be tightened and connected by the screw arranged in the middle of the nut connection pad and the nuts at both ends of the screw. After the nuts are tightened, the smooth fit between the end plates can make the connection structure more stable.

[0011] As a further preferred embodiment of the present invention, a stiffening plate arranged perpendicular to the nut backing plate is further provided on the inner side of the nut backing plate, and the other end of the stiffening plate is connected to the end plate.

[0012] Each nut connection plate is connected to no less than two stiffening plates from top to bottom, which provides higher strength.

[0013] As a further preferred embodiment of the present invention, the front support leg portion includes a sliding upper frame and a fixed lower frame which are arranged in sequence from top to bottom, the lower part of the sliding upper frame is provided with a first hydraulic cylinder, and the lower part of the fixed lower frame is provided with a pressure-bearing mechanism, the hydraulic rod of the first hydraulic cylinder is arranged vertically downward, and the bottom of the hydraulic rod of the first hydraulic cylinder is connected to the center of the top of the pressure-bearing mechanism; the sliding upper frame is composed of vertically arranged sleeved circular tubular columns and steel members, the steel members are arranged between the sleeved circular tubular columns, the first hydraulic cylinder is arranged at the center position of the bottom of the structure formed by the steel members, the fixed lower frame is composed of plug-in circular tubular columns, the pressure-bearing mechanism is arranged between the plug-in circular tubular columns, and the upper part of the plug-in circular tubular columns is plugged into the lower part of the sleeved circular tubular columns; the lower part of the front end of the sleeved circular tubular column is also provided with an inclined brace, the inclined brace is arranged forward and inclined upward, and the top of the inclined brace is hinged to the bottom surface of the main truss mechanism.

[0014] The first hydraulic cylinder can conveniently and quickly control the extension and retraction of the front support leg. Such a telescopic support structure is simple and has good stability. The diagonal brace is provided to better support the main truss mechanism.

[0015] As a further preferred embodiment of the present invention, the middle leg and the rear leg both include an electric roller support, a middle and rear leg portion and a middle and rear cross beam which are arranged in sequence from top to bottom, the middle and rear cross beam includes a fixed section and a horizontal extension section, the horizontal extension section is slidably arranged on both sides of the fixed section, the bottom of the middle and rear leg portion is connected to both sides of the top surface of the fixed section, a vertical jack is provided in the middle of the bottom surface of the fixed section, and an outer end support structure is provided on the outer side of the bottom surface of the horizontal extension section.

[0016] The vertical force on the center support point is transmitted to the center rear cross beam through the center rear support leg, and the center rear cross beam is transmitted to the main longitudinal beams and the center longitudinal beam on both sides of the main beam through the vertical jack. The center rear cross beam is arranged in a structure with adjustable length, which avoids the center rear support leg from colliding with the installed suspension rod when moving or crossing the span, and makes the distribution of the vertical force transmitted by the center support leg to the main beam more reasonable. At the same time, the retractable structure of the center rear cross beam can avoid the most unfavorable bearing point of the main beam.

[0017] As a further preferred embodiment of the present invention, the fixed section is a hollow steel member with a box-shaped cross-section, and the horizontal extension section is a steel member with an H-shaped cross-section. The inner end of the horizontal extension section is inserted into the hollow cavity of the fixed section. A second hydraulic cylinder is also provided in the hollow cavity of the fixed section, and the output shaft of the second hydraulic cylinder is connected to the inner end surface of the horizontal extension section.

[0018] The deployment and folding of the horizontal extension section can be conveniently and quickly controlled by the second hydraulic cylinder.

[0019] As a further preferred embodiment of the present invention, the lifting mechanism is a lifting winch.

[0020] As a further preferred embodiment of the present invention, the rotating hoist includes a horizontal rotation connection mechanism, a vertical longitudinal axis rotation connection seat, a hoist longitudinal beam, a vertical transverse axis rotation connection seat and a hoist cross beam, the horizontal rotation mechanism includes a steel cable connection part and a rotation sleeve part which are arranged in sequence from top to bottom, the steel cable connection part is connected to the steel cable of the hoisting mechanism, the rotation sleeve part is horizontally rotationally sleeved on the lower part of the steel cable connection part, the vertical longitudinal axis rotation connection seat is arranged at the lower part of the rotation sleeve part, the bottom of the vertical longitudinal axis rotation connection seat is rotationally connected to the middle part of the hoist longitudinal beam, and longitudinal beam angle adjustment hydraulic adjustment mechanisms are provided on both sides of the vertical longitudinal axis rotation connection seat, the vertical transverse axis rotation connection seat is arranged at the bottom of the hoist longitudinal beam, the bottom of the vertical transverse axis rotation connection seat is rotationally connected to the middle part of the hoist cross beam, and cross beam angle hydraulic adjustment mechanisms are provided on both sides of the hoist longitudinal beam.

[0021] A rotating motor is provided at the bottom of the steel cable connecting part, and the output shaft of the rotating motor is arranged downwardly, and an active tooth is provided in the middle of the output shaft of the rotating motor, and an annular tooth row is provided on the upper part of the inner wall of the rotating sleeve part opposite to the active tooth, and the active tooth is meshed with the annular tooth row. The rotating sleeve part can be quickly rotated by rotating the rotating motor, thereby guiding the crossbeam and longitudinal beam of the hoisting device to rotate in the horizontal direction; the horizontal orientation of the component can be adjusted by the horizontal rotating mechanism, and it can rotate 90 degrees in the horizontal direction, which can realize the horizontal transportation of the steel truss main beam segment and then rotate it to the longitudinal installation. Such lifting can avoid some construction auxiliary facilities and make the lifting more efficient. Then, the longitudinal angle of the lifting component can be adjusted by the longitudinal beam angle adjustment hydraulic adjustment mechanism, and the lateral angle of the lifting component can be adjusted by the cross beam angle adjustment hydraulic adjustment mechanism. In this way, the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, and the component can be quickly stabilized after lifting, which is more efficient.

[0022] As a further preferred embodiment of the present invention, the hydraulic adjustment mechanism for adjusting the angle of the longitudinal beam includes a longitudinal beam adjusting hydraulic cylinder, the top of which is rotationally connected to the side wall of the vertical longitudinal axis rotation connecting seat, and the output shaft of the longitudinal beam hydraulic cylinder is tilted downward and rotationally connected to the top surface of the longitudinal beam of the sling; the hydraulic adjustment mechanism for adjusting the angle of the crossbeam includes a crossbeam adjusting hydraulic cylinder, the top of which is rotationally connected to the side wall of the longitudinal beam of the sling, and the output shaft of the crossbeam hydraulic cylinder is tilted downward and rotationally connected to the top surface of the crossbeam of the sling, and lifting ear plates are provided on both sides of the bottom of the crossbeam.

[0023] The two longitudinal beam adjustment hydraulic cylinders on both sides of the longitudinal rotating seat can easily and quickly adjust the angle of the longitudinal beam of the spreader, thereby adjusting the longitudinal angle of the suspended component, with a maximum adjustment range of 5%; the two cross beam adjustment hydraulic cylinders on both sides of the longitudinal beam can easily and quickly adjust the angle of the cross beam of the spreader, thereby adjusting the cross angle of the suspended component, with a maximum adjustment range of 5%.

[0024] A method for construction using any one of the above-mentioned beam erecting machines for installation of steel main beams of suspension bridges, comprising the following steps: A. construction of the first section; B. construction of the second section; C. construction of the bridge erecting machine over the span; D. construction of the standard section; E. construction of the joint section; and F. interference inspection of the main beam segment installation.

[0025] The construction of the first section in step A includes: A1, installation of the bracket in front of the tower; assembly of the bridge erecting machine, safety inspection of the whole machine, acceptance, and preparation for the installation of the main beam segment; the middle leg is moved back to the vicinity of the rear leg to leave space for the main beam to rotate; the middle leg is lowered and does not touch the main truss mechanism; the tail feeds the beam, the overhead crane drives to the tail of the main truss mechanism to take the beam, and the construction of the first section begins; A2, the overhead crane hoists the first section of the beam, and the beam transport trolley descends from the bottom of the beam segment to the assembly site; the overhead crane hoists the beam segment and moves it longitudinally to the middle of the span of the main truss mechanism; A3, the hoist rotates 90 degrees to reach the main beam installation state; the overhead crane moves longitudinally, and the beam segment is docked to the main tower crossbeam support; adjust the longitudinal beam adjustment hydraulic cylinder and the crossbeam adjustment hydraulic cylinder on the hoist to adjust the transverse slope and longitudinal slope of the beam segment; adjust the transverse and longitudinal slopes and the support elevation again, loosen the lifting point, and complete the segment installation; The second section construction in step B includes: after the first section construction is completed, the bridge erection machine does not move, and the second section main beam is installed in the same way; after the installation is in place, the two sections are connected; the suspension rod is installed, the line shape and elevation are adjusted, and the suspension point is loosened to complete the installation of the second section; During the cross-span construction of the bridge erection machine in step C, the bridge erection machine uses its own counterweight to cross the span, and the counterweight method is that the overhead crane is connected and anchored with the lifting lug of the installed beam section through the sling. The cross-span construction of the bridge erection machine in step C includes: C1, the middle leg moves forward to the position of the hanger of the installed beam section, and is lifted up to contact with the lower chord of the main truss mechanism to play a supporting role; the rear leg moves forward to the next segment to the hanger position, and maintains a hanger spacing with the middle leg; the overhead crane moves longitudinally to the lifting lug of the beam section corresponding to the rear leg, connects the sling and the lifting lug to achieve the anchoring effect; C2, the main truss mechanism moves longitudinally forward to make the front leg reach the next hanger position; while the main truss mechanism moves longitudinally, the overhead crane moves synchronously with the main truss mechanism in the opposite direction to maintain the absolute position stability of the overhead crane; anchor the hanger and the front leg crossbeam; remove the anchor connection between the overhead crane and the main beam; C3, the middle leg is lowered, and the middle leg is lifted to the vicinity of the rear leg by the overhead crane to achieve the main beam installation condition; When crossing the span, the crane moves the counterweight to the tail of the main truss mechanism and anchors it on the main beam of the bridge deck to achieve the balance of the bridge erection machine, making the crossing safe and reliable; The standard section construction in step D comprises: D1, after the standard beam section is transported to the place by the beam transport vehicle, the beam is fed from the tail; the overhead crane hoisting point lifts the main beam section, the beam transport vehicle lowers the height and returns to the assembly site; the overhead crane hoists the beam section and moves it longitudinally to the middle of the main truss structure span, the hoisting device rotates 90 degrees to achieve the main beam installation state; prepare to drop the beam; the hoisting device rotates 90 degrees and drops the beam to the designed elevation; the overhead crane moves longitudinally to the installation position, connects the main beam node and the suspension rod; removes the hoisting point; During the construction of the jointing section in step E, the jointing section adopts a scattered assembly process. Before the jointing, both sides have jointing sections n and the previous segment n-1 of the jointing on our side. There are 2 segments left to be installed, one n-1 standard segment and one non-standard segment n. The construction of the jointing section in step E includes: E1, the bridge erection machine on one side is returned or dismantled, and the remaining 2 segments are erected by a bridge erection machine; the front legs of the bridge erection machine are dismantled, and the bridge erection machine is moved to the beam section that has been erected on the other side, and the front legs fall on the position of the boom, so that the bridge deck supports the front support point of the bridge erection machine; the front legs of the bridge erection machine are moved to the boom on the other side, and the installation of our n-1 segment is completed according to the above steps; E2, the previous segment of the jointing is installed in the way of standard segment installation; E3, the jointing segment is hoisted as a whole to complete the jointing of the whole bridge; The main beam segment installation interference check in step F is performed at the installation stage of the longest segment 1# segment; When any of the above-mentioned beam-erecting machines for installation of steel main beams of suspension bridges is used for construction, the main beam adopts a "2+2" assembly method, and each two sections are rigidly connected and installed completely. The upper end of the truss is hinged between each two sections, and the lower end is relaxed to adapt to the linear shape of the suspension bridge main beam. The length of each two adjacent sections is used as a span of the bridge-erecting machine, and a hanger is separated from each other as two support points of one span of the bridge-erecting machine.

[0026] When the steel truss beam section is installed, the main truss mechanism is supported by the system connected by the front leg truss beam and the suspension bridge hanger together with the middle leg to complete the installation of the main beam segment. When the bridge erecting machine is moving, the middle leg, support and rear leg bear the main vertical load transmitted by the bridge erecting machine to complete the longitudinal movement of the main machine. The overhead crane is the main working unit of the bridge erection machine. It mainly realizes the lifting operation of the main beam segment through the winch system. The rated lifting capacity of the overhead crane is 350t. It mainly includes the winch system, hydraulic station, driver's cab, overhead crane traveling mechanism, power supply system, and remote control device. The winch can be remotely controlled to lift and lower the crane and the longitudinal movement of the crane beam. The crane beam adopts a truss to increase its rigidity. The overhead crane of the bridge erection machine adopts remote control, which is flexible and easy to control. The mechanical transmission of the overhead crane of the bridge erection machine adopts frequency conversion control, which has stable operation, small impact force and precise positioning.

[0027] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. A front crossbeam is arranged between the front supporting legs, and the top surface of the front crossbeam can be detachably connected to the permanent hanger of the suspension bridge through a pin shaft, so that the permanent hanger of the suspension bridge is utilized to make it a front fulcrum support. When the bridge erection machine is erecting the beam, this structure and the middle supporting leg together constitute a simply supported system, which can jointly bear the weight of the bridge erection machine when erecting the beam, thereby increasing the lifting capacity. Since the length of the permanent hanger of the suspension bridge is inconsistent, it is necessary to adjust the height of the front crossbeam, and the adjustment of the height of the front crossbeam is achieved by adjusting the length of the front supporting leg, which has good adaptability. In order to adjust the direction and lifting angle of the lifting component, a rotating hoist is arranged, and the posture of the main beam segment can be adjusted during the lifting process through the rotating hoist, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, and the component can be quickly stabilized after lifting, which is more efficient.

[0028] 2. The top surface of the end plate on the upper chord is flush with the top surface of the upper chord; there are no less than three screws connected to each nut connection pad from top to bottom; since the end plates are arranged at the end surfaces of the upper chord and the lower chord of the main truss mechanism, the contact surface between the two main truss mechanism segments has a high degree of flatness, and then nut pads are arranged on the side walls of the upper chord and the lower chord of the main truss mechanism, and the two adjacent main truss mechanism segments can be tightened and connected by the screw arranged in the middle of the nut connection pad and the nuts at both ends of the screw. After the nuts are tightened, the smooth fit between the end plates can make the connection structure more stable.

[0029] 3. Each nut connection plate is connected to no less than two stiffening plates from top to bottom, which has higher strength.

[0030] 4. The first hydraulic cylinder can conveniently and quickly control the extension and retraction of the front support leg. Such a telescopic support structure is simple and has good stability. The diagonal brace can better support the main truss mechanism.

[0031] 5. The vertical force on the middle support point is transmitted to the middle rear cross beam through the middle rear support leg, and the middle rear cross beam is transmitted to the main longitudinal beams and the middle longitudinal beam on both sides of the main beam through the vertical jack. The middle rear cross beam is set to a structural form with adjustable length, which avoids the middle rear support leg from colliding with the installed suspension rod when moving or crossing the span, and at the same time makes the distribution of the vertical force transmitted by the middle support leg to the main beam more reasonable.

[0032] 6. The second hydraulic cylinder can be used to conveniently and quickly control the deployment and folding of the horizontal extension section.

[0033] 7. A rotating motor is provided at the bottom of the steel cable connecting part, and the output shaft of the rotating motor is arranged downwardly, and an active tooth is provided in the middle of the output shaft of the rotating motor, and an annular tooth row is provided on the upper part of the inner wall of the rotating sleeve part opposite to the active tooth, and the active tooth is meshed with the annular tooth row. The rotating sleeve part can be quickly rotated by rotating the rotating motor, thereby guiding the crossbeam and longitudinal beam of the hoisting device to rotate in the horizontal direction; the horizontal orientation of the component can be adjusted by the horizontal rotating mechanism, and it can rotate 90 degrees in the horizontal direction, which can realize the horizontal transportation of the steel truss main beam segment and then rotate it to the longitudinal installation. Such lifting can avoid some construction auxiliary facilities and make the lifting more efficient. Then, the longitudinal angle of the lifting component can be adjusted by the longitudinal beam angle adjustment hydraulic adjustment mechanism, and the lateral angle of the lifting component can be adjusted by the cross beam angle adjustment hydraulic adjustment mechanism. In this way, the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, and the component can be quickly stabilized after lifting, which is more efficient.

[0034] 8. The two longitudinal beam adjustment hydraulic cylinders on both sides of the longitudinal rotating seat can easily and quickly adjust the angle of the longitudinal beam of the spreader, thereby adjusting the longitudinal angle of the suspended component, with a maximum adjustment range of 5%; the two cross beam adjustment hydraulic cylinders on both sides of the longitudinal beam can easily and quickly adjust the angle of the cross beam of the spreader, thereby adjusting the cross angle of the suspended component, with a maximum adjustment range of 5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention.

[0037] Figure 2 It is a structural schematic diagram of the main truss mechanism of the present invention.

[0038] Figure 3 It is a structural schematic diagram of the stable connection mechanism of the present invention.

[0039] Figure 4 It is a schematic structural diagram of the front supporting leg of the present invention.

[0040] Figure 5 for Figure 4 Side view of.

[0041] Figure 6 It is a schematic structural diagram of the supporting legs and the rear supporting legs in the present invention.

[0042] Figure 7 for Figure 6 Side view of.

[0043] Figure 8 It is a structural schematic diagram of the rotary hanger of the present invention.

[0044] Fig. 9 for Figure 8Side view of.

[0045] Fig.10 This is the construction status diagram of the A1 phase during the construction of the first section.

[0046] Fig.11 This is the construction status diagram of the A2 stage during the construction of the first section.

[0047] Fig.12 This is the construction status diagram of the A3 stage during the construction of the first section.

[0048] Fig.13 This is the construction status diagram of the B1 stage during the construction of the second section.

[0049] Fig.14 This is the construction status diagram of the C1 stage when the bridge-building machine is crossing the span.

[0050] Fig.15 This is the construction status diagram of the C2 stage when the bridge-building machine is crossing the span.

[0051] Fig.16 This is the construction status diagram of the C3 stage when the bridge-building machine is crossing the span.

[0052] Fig.17 This is the construction status diagram of the D1 stage during the standard section construction.

[0053] Fig.18 This is the construction status diagram of the D2 stage during the standard section construction.

[0054] Fig.19 This is the construction status diagram of the D4 stage during the standard section construction.

[0055] Fig. 20 This is the construction status diagram of the E1 stage during the closure section construction.

[0056] Fig.21 This is the construction status diagram of the E2 stage during the closure section construction.

[0057] Fig. 22 This is the construction status diagram of the E3 stage during the closure section construction.

[0058] Fig.23 This is the position relationship diagram involved in the interference check during the installation of the main beam segment. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0060] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0062] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Specific embodiment 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.23 The invention shows a beam erecting machine for installing the steel main beam of a suspension bridge and a construction method using the same, comprising a main truss mechanism, a supporting mechanism, a lifting mechanism and a traveling mechanism, wherein the supporting mechanism comprises a front leg 1, a middle leg 2 and a rear leg 3 which are arranged in sequence from front to back at the bottom of the main truss mechanism, the front leg 1 comprises a front leg portion 11 and a front cross beam 12 which are arranged in sequence from top to bottom, the front leg portion 11 is a retractable structure with adjustable length, the top of the front leg portion 11 is hinged to the front part of the bottom surface of the main truss mechanism, the bottom of the front leg portion 11 is fixedly connected to the top surface of the front cross beam 12, the top surface of the front cross beam 12 is also detachably connected to the permanent hanger 4 of the suspension bridge via a pin shaft, the lifting mechanism is arranged on the top of the main truss mechanism by means of an overhead crane, and the lower part of the lifting mechanism is connected to a rotating hanger 5.

[0066] A front crossbeam is arranged between the front supporting legs, and the top surface of the front crossbeam can be detachably connected to the permanent hanger of the suspension bridge through a pin shaft, thus utilizing the permanent hanger of the suspension bridge to make it a front fulcrum support. When the bridge erection machine is erecting the beam, this structure and the middle supporting leg together constitute a simply supported system, which can jointly bear the weight of the bridge erection machine when erecting the beam, thereby increasing the lifting capacity. Since the lengths of the permanent hangers of the suspension bridge are inconsistent, the height of the front crossbeam needs to be adjusted, and the adjustment of the height of the front crossbeam is achieved by adjusting the length of the front supporting leg, which has good adaptability. In order to be able to adjust the direction and lifting angle of the lifting component, a rotating hoist is arranged, through which the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, the component can be quickly stabilized after lifting, and the efficiency is higher. Specific embodiment 2: This embodiment further illustrates the main truss mechanism on the basis of the specific embodiment 1. The main truss mechanism adopts a triangular truss structure. The upper and lower chords of the main truss mechanism adopt double H-shaped steel, and the web members and diagonal members adopt rectangular tubes. The entire section of the main truss mechanism is transported to the site for assembly, and the connection parts of the main cross mechanism sections are connected by a stable connection mechanism 6.

[0068] The main truss structure is 54m long, 5.3m high and 2.0m wide at the center. The main truss structure adopts 8m / segment, and the center distance between the two main trusses of the main truss structure is 20m. Specific embodiment 3: This embodiment further illustrates the stabilizing connection mechanism 6 on the basis of the specific embodiment 2. The stabilizing connection mechanism 6 includes an end plate 61 and a nut connection pad 62. The end plate 61 is arranged at the end faces of the upper chord and the lower chord of the main truss mechanism, and the nut connection pad 62 is arranged on the side walls of the upper chord and the lower chord of the main truss mechanism. The direction in which the nut connection pad 62 is arranged is perpendicular to the side walls of the upper chord and the lower chord of the main truss mechanism. The nut connection pad 62 is arranged close to the end plate 61. The segments of two adjacent main truss mechanisms are detachably connected by a screw rod arranged in the middle of the nut connection pad 62 and nuts at both ends of the screw rod.

[0070] The top surface of the end plate on the upper chord is flush with the top surface of the upper chord; there are no less than three screws connected to each nut connection pad from top to bottom; since the end plates are arranged at the end surfaces of the upper chord and the lower chord of the main truss mechanism, the contact surface between the two main truss mechanism segments has a high degree of flatness, and then nut pads are arranged on the side walls of the upper chord and the lower chord of the main truss mechanism, and the two adjacent main truss mechanism segments can be tightened and connected by the screw arranged in the middle of the nut connection pad and the nuts at both ends of the screw. After the nuts are tightened, the smooth fit between the end plates can make the connection structure more stable. Specific embodiment 4: This embodiment further illustrates the nut washer 62 on the basis of the specific embodiment 3. A stiffening plate 63 is provided on the inner side of the nut washer 62 and is arranged perpendicular to the nut washer 62 . The other end of the stiffening plate 63 is connected to the end plate 61 .

[0072] Each nut connection plate is connected to no less than two stiffening plates from top to bottom, which provides higher strength. Specific embodiment 5: This embodiment further describes the front leg portion 11 on the basis of the specific embodiment 1. The front leg portion 11 includes a sliding upper frame 111 and a fixed lower frame 112 arranged in sequence from top to bottom. The lower part of the sliding upper frame 111 is provided with a first hydraulic cylinder 113, and the lower part of the fixed lower frame 112 is provided with a pressure receiving mechanism 114. The hydraulic rod of the first hydraulic cylinder 113 is vertically arranged downward, and the bottom of the hydraulic rod of the first hydraulic cylinder 113 is connected to the center of the top of the pressure receiving mechanism 114. The sliding upper frame 111 is provided with a first hydraulic cylinder 113, and the bottom of the hydraulic rod of the first hydraulic cylinder 113 is connected to the center of the top of the pressure receiving mechanism 114. It is composed of vertically arranged sleeved circular tubular columns and steel members, the steel members are arranged between the sleeved circular tubular columns, the first hydraulic cylinder 113 is arranged at the center position of the bottom of the structure formed by the steel members, the fixed lower frame 112 is composed of plug-in circular tubular columns, the pressure bearing mechanism 114 is arranged between the plug-in circular tubular columns, and the upper part of the plug-in circular tubular column is plugged into the lower part of the sleeved circular tubular column; the lower part of the front end of the sleeved circular tubular column is also provided with an oblique brace 115, the oblique brace 115 is arranged to be inclined forward and upward, and the top of the oblique brace 115 is hinged to the bottom surface of the main truss mechanism.

[0074] The first hydraulic cylinder can conveniently and quickly control the extension and retraction of the front support leg. Such a telescopic support structure is simple and has good stability. The diagonal brace is provided to better support the main truss mechanism. Specific embodiment 6: This embodiment further explains the middle leg 2 and the rear leg 3 on the basis of the specific embodiment 1. The middle leg 2 and the rear leg 3 both include an electric roller support, a middle and rear leg portion and a middle and rear cross beam which are arranged in sequence from top to bottom. The middle and rear cross beam includes a fixed section 7 and a horizontal extension section 8. The horizontal extension section 8 is slidably arranged on both sides of the fixed section 7. The bottom of the middle and rear leg portion is connected to both sides of the top surface of the fixed section 7. A vertical jack 71 is provided in the middle of the bottom surface of the fixed section 7. An outer end support structure 81 is provided on the outer side of the bottom surface of the horizontal extension section 8.

[0076] The vertical force on the center support point is transmitted to the center rear cross beam through the center rear support leg, and the center rear cross beam is transmitted to the main longitudinal beams and the center longitudinal beam on both sides of the main beam through the vertical jack. The center rear cross beam is set to a structure with adjustable length, which avoids the center rear support leg from colliding with the installed suspension rod when moving or crossing the span, and at the same time makes the distribution of the vertical force transmitted by the center support leg to the main beam more reasonable. Specific embodiment 7: This embodiment further illustrates the fixed section 7 on the basis of the specific embodiment 6. The fixed section 7 is a hollow steel member with a box-shaped cross-section, and the horizontal extension section 8 is a steel member with an H-shaped cross-section. The inner end of the horizontal extension section 8 is inserted into the hollow cavity of the fixed section 7. A second hydraulic cylinder 72 is also provided in the hollow cavity of the fixed section 7, and the output shaft of the second hydraulic cylinder 72 is connected to the inner end surface of the horizontal extension section 8.

[0078] The deployment and folding of the horizontal extension section can be conveniently and quickly controlled by the second hydraulic cylinder. Specific embodiment 8: This embodiment further describes the lifting mechanism and the rotating sling 5 on the basis of the specific embodiment 1. The lifting mechanism is a lifting winch. The rotating sling 5 includes a horizontal rotation connection mechanism 51, a vertical longitudinal axis rotation connection seat 52, a sling longitudinal beam 53, a vertical transverse axis rotation connection seat 54 and a sling transverse beam 55. The horizontal rotation mechanism 51 includes a steel cable connection part 511 and a rotating sleeve part 512 arranged in sequence from top to bottom. The steel cable connection part 511 is connected to the steel cable of the hoisting mechanism. The rotating sleeve part 512 rotates horizontally. Connected to the lower part of the steel cable connection part 511, the vertical longitudinal axis rotation connection seat 52 is arranged at the lower part of the rotation sleeve part 512, the bottom of the vertical longitudinal axis rotation connection seat 52 is rotationally connected to the middle part of the longitudinal beam of the sling, and the two sides of the vertical longitudinal axis rotation connection seat 512 are provided with hydraulic adjustment mechanisms for adjusting the longitudinal beam angle, and the vertical transverse axis rotation connection seat 54 is arranged at the bottom of the longitudinal beam 53 of the sling, and the bottom of the vertical transverse axis rotation connection seat 54 is rotationally connected to the middle part of the transverse beam 55 of the sling, and the two sides of the longitudinal beam 53 of the sling are provided with hydraulic adjustment mechanisms for the transverse beam angle.

[0080] A rotating motor is provided at the bottom of the steel cable connecting part, and the output shaft of the rotating motor is arranged downwardly, and an active tooth is provided in the middle of the output shaft of the rotating motor, and an annular tooth row is provided on the upper part of the inner wall of the rotating sleeve part opposite to the active tooth, and the active tooth is meshed with the annular tooth row. The rotating sleeve part can be quickly rotated by rotating the rotating motor, thereby guiding the crossbeam and longitudinal beam of the hoisting device to rotate in the horizontal direction; the horizontal orientation of the component can be adjusted by the horizontal rotating mechanism, and it can rotate 90 degrees in the horizontal direction, which can realize the horizontal transportation of the steel truss main beam segment and then rotate it to the longitudinal installation. Such lifting can avoid some construction auxiliary facilities and make the lifting more efficient. Then, the longitudinal angle of the lifting component can be adjusted by the longitudinal beam angle adjustment hydraulic adjustment mechanism, and the lateral angle of the lifting component can be adjusted by the cross beam angle adjustment hydraulic adjustment mechanism. In this way, the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, and the component can be quickly stabilized after lifting, which is more efficient. Specific embodiment 9: This embodiment further explains the hydraulic adjustment mechanism for adjusting the longitudinal beam angle on the basis of the specific embodiment 8, wherein the hydraulic adjustment mechanism for adjusting the longitudinal beam angle includes a longitudinal beam adjusting hydraulic cylinder, wherein the top of the longitudinal beam adjusting hydraulic cylinder is rotationally connected to the side wall of the vertical longitudinal axis rotation connecting seat 52, and the output shaft of the longitudinal beam hydraulic cylinder is tilted downward and rotationally connected to the top surface of the sling longitudinal beam 53; the hydraulic adjustment mechanism for adjusting the cross beam angle includes a cross beam adjusting hydraulic cylinder, wherein the top of the cross beam adjusting hydraulic cylinder is rotationally connected to the side wall of the sling longitudinal beam 53, and the output shaft of the cross beam hydraulic cylinder is tilted downward and rotationally connected to the top surface of the sling cross beam 55, and lifting ear plates 9 are provided on both sides of the bottom of the sling cross beam 55.

[0082] The two longitudinal beam adjustment hydraulic cylinders on both sides of the longitudinal rotating seat can easily and quickly adjust the angle of the longitudinal beam of the spreader, thereby adjusting the longitudinal angle of the suspended component, with a maximum adjustment range of 5%; the two cross beam adjustment hydraulic cylinders on both sides of the longitudinal beam can easily and quickly adjust the angle of the cross beam of the spreader, thereby adjusting the cross angle of the suspended component, with a maximum adjustment range of 5%. Specific embodiment 10: A method for construction using any one of the above-mentioned beam erecting machines for installation of steel main beams of suspension bridges, comprising the following steps: A. construction of the first section; B. construction of the second section; C. construction of the bridge erecting machine over the span; D. construction of the standard section; E. construction of the joint section; and F. interference inspection of the main beam segment installation.

[0084] The construction of the first section in step A includes: A1, installation of the bracket in front of the tower; assembly of the bridge erecting machine, safety inspection of the whole machine, acceptance, and preparation for the installation of the main beam segment; the middle leg is moved back to the vicinity of the rear leg to leave space for the main beam to rotate; the middle leg is lowered and does not touch the main truss mechanism; the tail feeds the beam, the overhead crane drives to the tail of the main truss mechanism to take the beam, and the construction of the first section begins; A2, the overhead crane hoists the first section of the beam, and the beam transport trolley descends from the bottom of the beam segment to the assembly site; the overhead crane hoists the beam segment and moves it longitudinally to the middle of the span of the main truss mechanism; A3, the hoist rotates 90 degrees to reach the main beam installation state; the overhead crane moves longitudinally, and the beam segment is docked to the main tower crossbeam support; adjust the longitudinal beam adjustment hydraulic cylinder and the crossbeam adjustment hydraulic cylinder on the hoist to adjust the transverse slope and longitudinal slope of the beam segment; adjust the transverse and longitudinal slopes and the support elevation again, loosen the lifting point, and complete the segment installation; The second section construction in step B includes: after the first section construction is completed, the bridge erection machine does not move, and the second section main beam is installed in the same way; after the installation is in place, the two sections are connected; the suspension rod is installed, the line shape and elevation are adjusted, and the suspension point is loosened to complete the installation of the second section; During the cross-span construction of the bridge erection machine in step C, the bridge erection machine uses its own counterweight to cross the span, and the counterweight method is that the overhead crane is connected and anchored with the lifting lug of the installed beam section through the sling. The cross-span construction of the bridge erection machine in step C includes: C1, the middle leg moves forward to the position of the hanger of the installed beam section, and is lifted up to contact with the lower chord of the main truss mechanism to play a supporting role; the rear leg moves forward to the next segment to the hanger position, and maintains a hanger spacing with the middle leg; the overhead crane moves longitudinally to the lifting lug of the beam section corresponding to the rear leg, connects the sling and the lifting lug to achieve the anchoring effect; C2, the main truss mechanism moves longitudinally forward to make the front leg reach the next hanger position; while the main truss mechanism moves longitudinally, the overhead crane moves synchronously with the main truss mechanism in the opposite direction to maintain the absolute position stability of the overhead crane; anchor the hanger and the front leg crossbeam; remove the anchor connection between the overhead crane and the main beam; C3, the middle leg is lowered, and the middle leg is lifted to the vicinity of the rear leg by the overhead crane to achieve the main beam installation condition; When crossing the span, the crane moves the counterweight to the tail of the main truss mechanism and anchors it on the main beam of the bridge deck to achieve the balance of the bridge erection machine, making the crossing safe and reliable; The standard section construction in step D includes: D1, after the standard beam section is transported to the place by the beam transport vehicle, the beam is fed from the tail; the overhead crane hoisting point lifts the main beam segment, the beam transport vehicle lowers the height and returns to the assembly site; prepares to drop the beam; the hoisting device rotates 90 degrees and drops the beam to the designed elevation; the overhead crane moves longitudinally to the installation position, connects the main beam node and the suspension rod; removes the lifting point; During the construction of the jointing section in step E, the jointing section adopts a scattered assembly process. Before the jointing, both sides have jointing sections n and the previous segment n-1 of the jointing on our side. There are 2 segments left to be installed, one n-1 standard segment and one non-standard segment n. The construction of the jointing section in step E includes: E1, the bridge erection machine on one side is returned or dismantled, and the remaining 2 segments are erected by a bridge erection machine; the front legs of the bridge erection machine are dismantled, and the bridge erection machine is moved to the beam section that has been erected on the other side, and the front legs fall on the position of the boom, so that the bridge deck supports the front support point of the bridge erection machine; the front legs of the bridge erection machine are moved to the boom on the other side, and the installation of our n-1 segment is completed according to the above steps; E2, the previous segment of the jointing is installed in the way of standard segment installation; E3, the jointing segment is hoisted as a whole to complete the jointing of the whole bridge; The main beam segment installation interference check in step F is performed at the installation stage of the longest segment 1# segment; When any of the above-mentioned beam-erecting machines for installation of steel main beams of suspension bridges is used for construction, the main beam adopts a "2+2" assembly method, and each two sections are rigidly connected and installed completely. The upper end of the truss is hinged between each two sections, and the lower end is relaxed to adapt to the linear shape of the suspension bridge main beam. The length of each two adjacent sections is used as a span of the bridge-erecting machine, and a hanger is separated from each other as two support points of one span of the bridge-erecting machine.

[0085] When the steel truss beam section is installed, the main truss mechanism is supported by the system connected by the front leg truss beam and the suspension bridge hanger together with the middle leg to complete the installation of the main beam segment. When the bridge erecting machine is moving, the middle leg, support and rear leg bear the main vertical load transmitted by the bridge erecting machine to complete the longitudinal movement of the main machine. The overhead crane is the main working unit of the bridge erection machine. It mainly realizes the lifting operation of the main beam segment through the winch system. The rated lifting capacity of the overhead crane is 350t. It mainly includes the winch system, hydraulic station, driver's cab, overhead crane traveling mechanism, power supply system, and remote control device. The winch can be remotely controlled to lift and lower the crane and the longitudinal movement of the crane beam. The crane beam adopts a truss to increase its rigidity. The overhead crane of the bridge erection machine adopts remote control, which is flexible and easy to control. The mechanical transmission of the overhead crane of the bridge erection machine adopts frequency conversion control, which has stable operation, small impact force and precise positioning.

[0086] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional beam erecting machine for installing steel main beams of suspension bridges, characterized in that: The invention comprises a main truss mechanism, a supporting mechanism, a lifting mechanism and a walking mechanism, wherein the supporting mechanism comprises a front leg (1), a middle leg (2) and a rear leg (3) which are arranged in sequence from front to back at the bottom of the main truss mechanism, the front leg (1) comprises a front leg portion (11) and a front cross beam (12) which are arranged in sequence from top to bottom, the front leg portion (11) is a retractable structure with adjustable length, the top of the front leg portion (11) is hinged to the front part of the bottom surface of the main truss mechanism, the bottom of the front leg portion (11) is fixedly connected to the top surface of the front cross beam (12), the top surface of the front cross beam (12) is also detachably connected to a permanent hanger (4) of a suspension bridge via a pin shaft, the lifting mechanism is arranged on the top of the main truss mechanism by means of a trolley, and the lower part of the lifting mechanism is connected to a rotating hanger (5).

2. The multifunctional beam erecting machine for installing the steel main beam of a suspension bridge according to claim 1, characterized in that: The main truss mechanism adopts a triangular truss structure, the upper and lower chords of the main truss mechanism adopt double H-shaped steel, the web members and diagonal members adopt rectangular tubes, the entire section of the main truss mechanism is transported to the site for assembly, and the connection parts of the main cross mechanism sections are connected by a stable connection mechanism (6).

3. The multifunctional beam erecting machine for installing the steel main beam of a suspension bridge according to claim 2 is characterized in that: The stabilizing connection mechanism (6) comprises an end plate (61) and a nut connection pad (62); the end plate (61) is arranged at the end surfaces of the upper chord and the lower chord of the main truss mechanism; the nut connection pad (62) is arranged on the side walls of the upper chord and the lower chord of the main truss mechanism; the nut connection pad (62) is arranged in a direction perpendicular to the side walls of the upper chord and the lower chord of the main truss mechanism; the nut connection pad (62) is arranged at a position close to the end plate (61); and two adjacent sections of the main truss mechanism are detachably connected via a screw rod arranged in the middle of the nut connection pad (62) and nuts at both ends of the screw rod.

4. The multifunctional beam erecting machine for installing steel main beams of suspension bridges according to claim 3 is characterized in that: A stiffening plate (63) is also provided on the inner side of the nut backing plate (62) and is arranged perpendicular to the nut backing plate (62), and the other end of the stiffening plate (63) is connected to the end plate (61).

5. The multifunctional beam erecting machine for installing the steel main beam of a suspension bridge according to claim 1 is characterized in that: The front support leg (11) comprises a sliding upper frame (111) and a fixed lower frame (112) which are arranged in sequence from top to bottom; a first hydraulic cylinder (113) is provided at the lower portion of the sliding upper frame (111); a pressure receiving mechanism (114) is provided at the lower portion of the fixed lower frame (112); a hydraulic rod of the first hydraulic cylinder (113) is arranged vertically downward; the bottom of the hydraulic rod of the first hydraulic cylinder (113) is connected to the center of the top of the pressure receiving mechanism (114); the sliding upper frame (111) is composed of a vertically arranged sleeved circular pipe column and The structure is composed of a steel structure, the steel structure is arranged between the sleeved round tube columns, the first hydraulic cylinder (113) is arranged at the center position of the bottom of the structure formed by the steel structure, the fixed lower frame (112) is composed of the inserted round tube columns, the pressure receiving mechanism (114) is arranged between the inserted round tube columns, and the upper part of the inserted round tube column is inserted into the lower part of the sleeved round tube column; the lower part of the front end of the sleeved round tube column is also provided with an inclined brace (115), the inclined brace (115) is arranged to tilt forward and upward, and the top of the inclined brace (115) is hinged to the bottom surface of the main truss mechanism.

6. The multifunctional beam erecting machine for installing steel main beams of suspension bridges according to claim 1 is characterized in that: The middle support leg (2) and the rear support leg (3) both comprise an electric roller support, a middle rear support leg portion and a middle rear cross beam which are arranged in sequence from top to bottom; the middle rear cross beam comprises a fixed section (7) and a horizontal extension section (8); the horizontal extension section (8) is slidably arranged on both sides of the fixed section (7); the bottom of the middle rear support leg portion is connected to both sides of the top surface of the fixed section (7); a vertical jack (71) is provided in the middle of the bottom surface of the fixed section (7); and an outer end support structure (81) is provided on the outer side of the bottom surface of the horizontal extension section (8).

7. The multifunctional beam erecting machine for installing the steel main beam of a suspension bridge according to claim 6 is characterized in that: The fixed section (7) is a hollow steel member with a box-shaped cross section, and the horizontal extension section (8) is a steel member with an H-shaped cross section. The inner end of the horizontal extension section (8) is inserted into the hollow cavity of the fixed section (7). A second hydraulic cylinder (72) is also provided in the hollow cavity of the fixed section (7), and the output shaft of the second hydraulic cylinder (72) is connected to the inner end surface of the horizontal extension section (8).

8. The multifunctional beam erecting machine for installing the steel main beam of a suspension bridge according to claim 1, characterized in that: The rotating sling (5) comprises a horizontal rotation connection mechanism (51), a vertical longitudinal axis rotation connection seat (52), a sling longitudinal beam (53), a vertical transverse axis rotation connection seat (54) and a sling transverse beam (55), wherein the horizontal rotation mechanism (51) comprises a steel cable connection portion (511) and a rotation sleeve portion (512) arranged in sequence from top to bottom, wherein the steel cable connection portion (511) is connected to a steel cable of a hoisting mechanism, and the rotation sleeve portion (512) is horizontally rotatably sleeved on the lower portion of the steel cable connection portion (511), and the vertical longitudinal axis rotation connection seat (52) is arranged to rotate horizontally and horizontally on the lower portion of the steel cable connection portion (511). The connecting seat (52) is arranged at the lower part of the rotating sleeve part (512), and the bottom of the vertical longitudinal axis rotating connecting seat (52) is rotatably connected to the middle part of the longitudinal beam of the sling, and hydraulic adjustment mechanisms for adjusting the longitudinal beam angle are provided on both sides of the vertical longitudinal axis rotating connecting seat (512). The vertical transverse axis rotating connecting seat (54) is arranged at the bottom of the longitudinal beam (53) of the sling, and the bottom of the vertical transverse axis rotating connecting seat (54) is rotatably connected to the middle part of the cross beam (55) of the sling, and hydraulic adjustment mechanisms for the cross beam angle are provided on both sides of the longitudinal beam (53) of the sling.

9. The multifunctional beam erecting machine for installing steel main beams of suspension bridges according to claim 8, characterized in that: The longitudinal beam angle adjustment hydraulic adjustment mechanism comprises a longitudinal beam adjustment hydraulic cylinder, the top of which is rotationally connected to the side wall of the vertical longitudinal axis rotation connection seat (52), and the output shaft of which is tilted downward and rotationally connected to the top surface of the sling longitudinal beam (53); the crossbeam angle adjustment hydraulic adjustment mechanism comprises a crossbeam adjustment hydraulic cylinder, the top of which is rotationally connected to the side wall of the sling longitudinal beam (53), and the output shaft of which is tilted downward and rotationally connected to the top surface of the sling crossbeam (55), and lifting ear plates (9) are provided on both sides of the bottom of the sling crossbeam (55).

10. A method for construction using a multifunctional beam erecting machine for installation of steel main beams of a suspension bridge as described in any one of claims 1 to 9, comprising the following steps: A. construction of the first section; B. construction of the second section; C. construction of the standard section; D. construction of the joint section; E. interference check of main beam section installation.

Images