A bridge erecting machine and construction method for the integral erection construction of the upper structure of a long-span bridge

Abstract

The present invention discloses a bridge erecting machine and a construction method for the integral erection construction of the upper structure of a long-span bridge. The bridge erecting machine for the integral erection construction of the upper structure of a long-span bridge includes a main truss arranged longitudinally along the bridge, a lifting device slidably connected to the upper end surface of the main truss, and a front support fixedly arranged at the front end of the main truss along the longitudinal direction of the bridge. It further includes a leg system slidably connected to the main truss; the leg system includes a plurality of legs, any of the legs is a telescopic structure and is provided with a driving device, and the driving device drives the leg to slide on the main truss along the bridge erection direction; several of the legs are alternately fixed to support the main truss, and the driving device on the fixed leg drives the main truss to travel multiple spans along the bridge erection direction. The present invention can achieve the erection of multiple steel beams at one time, which not only improves the bridge erection efficiency but also ensures the stability of the bridge erecting machine.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction. More specifically, the present invention relates to a bridge erecting machine and a construction method for the integral erection construction of the upper structure of a long-span bridge. Background Art

[0002] In recent years, the national infrastructure construction and ecological civilization construction have been promoted simultaneously. Bridges require less land than roadbeds, so they are widely used. The requirement for the floor area of the lower structure of bridges is further reduced, prompting bridges to develop towards large-span directions. Among large-span bridge categories, the girder bridge is a more economical structural type. The upper structure type of the girder bridge can be a prestressed concrete structure or a steel-concrete composite beam structure. When designing a prestressed concrete beam, there is an upper limit on the maximum span. Therefore, the steel-concrete composite beam structure can be preferably selected as the upper structure of the girder bridge. The construction technology of the girder bridge is cast-in-place with supports and the method of erecting with a bridge erecting machine. If the support method is adopted, foundation treatment is required, and the amount of support work is large, which cannot meet the requirement of resource conservation. The method of using a bridge erecting machine is an assembly process, which meets the requirements of energy conservation, environmental protection and green construction.

[0003] For long-span bridges, adopting the steel-concrete composite beam type, the overall hoisting weight is large, and the performance requirements for the bridge erecting machine are high. In order to meet this performance, the bridge erecting machine has a high functional cost. Therefore, the cross-section adopts a staged hoisting method, which can solve this problem and achieve the best functional value. Conventional bridge erecting machines can only meet the requirements of single-span erection, which is not conducive to promoting the project construction speed and realizing the rapid construction of bridges. Summary of the Invention

[0004] An object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0005] In order to achieve these objects and other advantages according to the present invention, a bridge erecting machine for the integral erection construction of the upper structure of a long-span bridge is provided, including a main truss arranged longitudinally along the bridge, a lifting device slidably connected to the upper end surface of the main truss, and a front support fixedly arranged at the front end of the main truss along the longitudinal direction of the bridge. It further includes a leg system slidably connected to the main truss;

[0006] The leg system includes a plurality of legs. Any of the legs is a telescopic structure and is provided with a driving device. The driving device drives the leg to slide on the main truss along the bridge erection direction; several of the legs are alternately fixed to support the main truss, and the driving device on the fixed leg drives the main truss to travel multiple spans along the bridge erection.

[0007] Preferably, any of the legs further includes:

[0008] A leg U-beam, which is arranged transversely along the bridge below the main truss;

[0009] A pair of vertical legs are fixedly arranged at both ends of the U-shaped leg beam of the support legs. Two pulley groups are arranged at the top of each vertical leg at intervals in the vertical direction; lower cross bars are arranged at the bottoms on both sides of the main truss, and slide rails matched with the pulley groups are arranged on the top surface and the bottom surface of the lower cross bars respectively; the driving device is connected to any one of the pulley groups to drive the pulley group to slide relative to the slide rail.

[0010] A pair of small support legs, any one of the small support legs is arranged transversely under the U-shaped leg beam of the support legs and is hinged to the U-shaped leg beam of the support legs; a plurality of first oil cylinders are embedded at the bottom of any one of the small support legs, and the telescopic ends of the first oil cylinders extend out of the bottom surface of the small support legs and are hinged with spherical hinge supports.

[0011] Preferably, any one of the vertical legs includes an upper vertical leg and a lower vertical leg, the upper vertical leg and the lower vertical leg are rotationally connected by a rotating pin shaft, a rotating motor is arranged on the lower vertical leg, and the rotating motor drives the rotating pin shaft to rotate, driving the lower vertical leg to rotate around the upper vertical leg.

[0012] Preferably, the support leg system includes four support legs, and the four support legs are successively the first middle support leg, the second middle support leg, the first rear support leg and the second rear support leg from front to back along the bridge erection direction; a second oil cylinder is further arranged between any one of the small support legs of the second middle support leg and the U-shaped leg beam of the support legs, the fixed end of which is fixedly connected to the U-shaped leg beam of the support legs, and the telescopic end of which is fixedly connected to the small support leg.

[0013] Preferably, the lifting device includes:

[0014] Two truss crane cross beams, any one of the truss crane cross beams is arranged transversely above the main truss and is slidably connected to the upper end surface of the main truss;

[0015] A lifting trolley is slidably arranged above any one of the truss crane cross beams, and the lifting trolley can move along the axis direction of the truss crane cross beam under the action of a driving motor.

[0016] Preferably, it further includes a plurality of lifting devices, and any one of the lifting devices includes:

[0017] A lifting cross beam, which is fixedly arranged transversely under the main truss;

[0018] A plurality of jacks, any one of the jacks is fixedly arranged vertically above the lifting cross beam; the telescopic end of any one of the jacks is fixedly connected with a lifting steel wire cable, and the other end of the lifting steel wire cable is fixedly connected with the already erected steel beam;

[0019] The jacks lift the lifting steel wire cables upward to pre-tension the already erected steel beam.

[0020] Another object of the present invention is to provide a construction method for a bridge erecting machine used in the overall erection construction of the upper structure of a long-span bridge. In the initial working condition: along the bridge erection direction, the N1 pier, the N1 section of steel beam, the N2 pier, the N2 section of steel beam, the N3 pier, the N3 section of steel beam, the N4 pier, the N5 pier, and the N6 pier have been installed. The front support is located on the top of the N5 pier, the first middle support leg and the second middle support leg are located at the front part of the main truss, the first rear support leg is located in the middle and rear part of the main truss, and the second rear support leg is located at the tail of the main truss. The method includes the following steps:

[0021] S1. Lift the front support leg and the second rear support leg. The second middle support leg and the first rear support leg are respectively supported on the N3 section of steel beam and the N2 section of steel beam. Move the lifting device to the tail of the main truss, and move the main truss forward until the front support is supported on the top of the N5 pier, completing the first span traversing, that is, moving forward one span;

[0022] S2. Lift the second middle support leg, move the first middle support leg and the second middle support leg above the N5 pier, and lower the second middle support leg so that it is supported on the top of the N5 pier; lower the second rear support leg so that it is supported on the N2 section of steel beam, and lift the first rear support leg; move the first rear support leg forward to the front end of the N3 section of steel beam and then lower it so that it is supported on the N3 section of steel beam;

[0023] S3. Lift the front support and the second rear support leg, move the main truss forward until the front support is supported on the top of the N6 pier, and lower the second rear support leg so that it is supported on the N3 section of steel beam, completing the second span traversing;

[0024] S4. Use the lifting device to lift the N5 section of steel beam to be installed, move the two lifting beam crossbeams forward until the N5 section of steel beam reaches above the second span, adjust the position of the lifting trolley on the lifting beam crossbeam so that the steel beam section is above the designed position, and lower the N5 section of steel beam to the tops of the N5 pier and the N6 pier; lower the first middle support leg so that it is supported on the N5 section of steel beam, and retract the second middle support leg; then install the N4 section of steel beam above the first span in the same way, completing the erection of two spans of steel beams.

[0025] Preferably, after the erection of two spans of steel beams, the bridge deck is installed. The installation of the bridge deck specifically includes the following steps:

[0026] S5. Move the two lifting beam crossbeams back to the tail of the main truss, use the lifting device to lift the bridge deck to be installed, move the two lifting beam crossbeams forward until the bridge deck reaches above the N5 section of steel beam, and adjust the position of the lifting trolley on the lifting beam crossbeam so that the bridge deck is above the designed position;

[0027] S6. Install the lifting device at the position where the lifting force is required, and apply the lifting force to the steel beam of the N5 section; lower the bridge deck and install it on the steel beam of the N5 section; then load the lifting force in the lifting device to the final design requirement; install the bridge deck on the steel beam of the N4 section in the same way.

[0028] S7. Pour the wet joint concrete between the bridge decks. During this period, the bridge erection machine remains static. After the poured concrete reaches the required strength, remove the lifting device.

[0029] S8. Repeat steps S1 - S7 until all the steel beams and bridge decks are installed.

[0030] Preferably, rotate the rotating pin shafts in each of the legs to drive the lower vertical legs, the leg U - beams and a pair of the small legs in each of the legs to rotate together, so as to realize the lifting or lowering of each of the legs.

[0031] Preferably, the first oil cylinders in each of the legs adjust the lengths of each of the legs, so as to realize the lifting or lowering of each of the legs.

[0032] The present invention has at least the following beneficial effects:

[0033] 1. In the bridge erection machine for the integral erection construction of the upper structure of a long - span bridge provided by the present invention, the leg system includes a plurality of legs. When the main truss travels across the span, it is not necessary for all the legs to support. By alternately fixing some of the legs to support the main truss, and at the same time, the driving device on the legs supporting the main truss drives the main truss to travel multiple spans along the bridge erection direction, and then hoisting the steel beam by the hoisting device, so that it is possible to erect multiple spans of steel beams at one time, which not only improves the bridge erection efficiency but also ensures the stability of the bridge erection machine.

[0034] 2. In the bridge erection machine for the integral erection construction of the upper structure of a long - span bridge provided by the present invention, the rotating pin shafts and rotating motors are arranged on each of the legs in the leg system. During the process of the main truss traveling, the main truss can be alternately supported by retracting or lowering through the rotating pin shafts and rotating motors.

[0035] 3. In the bridge erection machine for the integral erection construction of the upper structure of a long - span bridge provided by the present invention, the first oil cylinders are arranged on each of the legs in the leg system. The distance between the bottom of the leg and the pier top or the bridge deck can be adjusted by the first oil cylinders to realize the lifting or lowering of the legs to alternately support the main truss.

[0036] 4. The lifting device is provided in the bridge erection machine for the integral erection construction of the upper structure of a long - span bridge provided by the present invention. During the later pouring of the concrete deck, an upward lifting force can be provided to the corresponding steel beam so that it can bear the load of the concrete deck, which can reduce the erection performance requirements of the bridge erection machine and reduce the steel consumption in the design.

[0037] Other advantages, objectives, and features of the present invention will be partially reflected in the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic side view of the bridge erection machine in an embodiment of the present invention;

[0039] Figure 2 Schematic structural view of the leg in the above embodiment of the present invention;

[0040] Figure 3 Schematic structural view of the second middle leg in the above embodiment of the present invention;

[0041] Figure 4 Schematic structural view of the vertical leg in the above embodiment of the present invention;

[0042] Figure 5 Schematic structural view of the lifting device in the above embodiment of the present invention;

[0043] Figure 6 Schematic structural view of the lifting device in the above embodiment of the present invention;

[0044] Figure 7 Schematic structural view of the main truss advancing one span in the above embodiment of the present invention;

[0045] Figure 8 Schematic structural view of the main truss advancing two spans in the above embodiment of the present invention;

[0046] Figures 9 to 10 Schematic structural view of the bridge erection machine during the hoisting of the steel beam in the above embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The following further describes the present invention in detail with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0048] It should be noted that the experimental methods described in the following implementation plans are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by terms such as "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 should not be construed as a limitation to the present invention.

[0049] As Figures 1 to 6 shown, the present invention provides a bridge erecting machine for the integral erection construction of the upper structure of a long-span bridge, which includes a main truss 1 arranged longitudinally along the bridge, a lifting device 4 slidably connected to the upper end surface of the main truss 1, and a front support 2 fixedly arranged at the front end of the main truss 1 along the longitudinal direction of the bridge, and further includes a leg system 3 slidably connected to the main truss 1.

[0050] The leg system 3 includes a plurality of legs, any of the legs is a telescopic structure and is provided with a driving device 302, and the driving device 302 drives the leg to slide on the main truss 1 along the bridge erection direction; several of the legs are alternately fixed to support the main truss 1, and the driving device 302 on the fixed leg drives the main truss 1 to travel multiple spans along the bridge erection direction.

[0051] In this technical solution, the position of some of the legs in the leg system 3 on the main truss 1 is adjusted by the driving device 302 on each of the legs, and fixed on the top of the installed pier or on the bridge deck, so that this part of the fixed legs can ensure the stability of the main truss 1. The driving device 302 on this part of the fixed legs is started to drive the main truss 1 to move forward along the bridge erection direction until the front support 2 moves forward one span to reach the top of the next pier, and the front support 2 is fixed on the top of this pier to support the main truss 1. Among them, the front support 2 is composed of a plurality of support segments spliced together and can adapt to the elevation changes in different erection areas. According to the stress condition of the main truss 1, the position of some of the legs on the main truss 1 is adjusted and the legs that need to be fixed are re-determined. The fixed connection of the front support 2 is released, and the main truss 1 is moved forward until the front support 2 reaches the top of the next pier, completing the progress of two spans. The front support 2 is fixed again, and the legs that need to be fixed are adjusted to ensure the stability during the steel beam hoisting process. Then the hoisting device 4 is started to hoist the steel beams on two spans in sequence. The hoisting device 4 needs to move to the tail of the main truss 1 before the main truss 1 crosses the first span. When hoisting the steel beam, the beam carrier transports the steel beam to be installed to the lower part of the hoisting device 4 for feeding the beam.

[0052] In another embodiment, any of the legs further includes:

[0053] A leg U-beam 304, which is arranged transversely under the main truss 1;

[0054] A pair of vertical legs 303, fixedly arranged at both ends of the leg U-beam 304. Two pulley blocks 301 are arranged at intervals up and down at the top of each vertical leg 303; lower cross bars are arranged at the bottoms on both sides of the main truss 1, and slide rails matched with the pulley blocks 301 are arranged on the top surface and the bottom surface of the lower cross bar respectively; the driving device 302 is connected to any of the pulley blocks 301 to drive the pulley block 301 to slide relative to the slide rail;

[0055] A pair of small legs 305, any of the small legs 305 is arranged transversely under the leg U-beam 304 and is hinged to the leg U-beam 304; a plurality of first oil cylinders 306 are embedded at the bottom of any of the small legs 305, and the telescopic ends of the first oil cylinders 306 extend out of the bottom surface of the small legs 305 and are hinged with a spherical hinge support 307.

[0056] In this technical solution, the lower cross bar is arranged between two pulley groups 301 which are arranged at an upper and lower interval. When the support legs are fixed on the top of the pier or the bridge deck, the support legs are used to support the main truss 1. At this time, the lower roller group 301 located below is in contact with the slide rail on the bottom surface of the lower cross bar. The driving device 302 on the support legs is started to drive the lower roller group 301 to roll, so as to drive the main truss to move longitudinally along the bridge. When the support legs are not used as support members, the support legs are equivalent to being suspended on the main truss 1. At this time, the upper pulley group 301 located above is in contact with the slide rail on the top surface of the lower cross bar. The driving device 302 on the support legs is started to drive the upper roller group 301 to roll, so as to drive the support legs to move longitudinally on the main truss 1.

[0057] As Figure 2 shown, a plurality of first oil cylinders 306 are embedded in the bottom surface of any small support leg 305. The plurality of first oil cylinders 306 are symmetrically arranged on both sides of the bottom surface of the small support leg 305. The first oil cylinder 306 is used to adjust the length of the support leg. When the support leg is used to support the main truss 1, the first oil cylinder 306 is jacked up to make the support leg drop to be fixedly connected to the top of the pier or the bridge deck. When the support leg is not used as a support member, the fixed connection of the support leg is released, and the first oil cylinder 306 retracts to lift the support leg. By arranging a plurality of first oil cylinders 306, the length of the support leg can be adaptively adjusted according to the change of the elevation in the bridge erection area. A spherical hinge support 307 is hinged to the telescopic end of each first oil cylinder 306. The spherical hinge support 307 can adapt to a small range of inclination of the support position, making the support of the support leg more stable.

[0058] In another embodiment, any vertical leg 303 includes an upper vertical leg 3031 and a lower vertical leg 3034. The upper vertical leg 3031 and the lower vertical leg 3034 are rotatably connected by a rotating pin shaft 3032. A rotating motor 3033 is arranged on the lower vertical leg 3034. The rotating motor 3033 drives the rotating pin shaft 3032 to rotate, driving the lower vertical leg 3024 to rotate around the upper vertical leg 3031.

[0059] In this technical solution, as Figure 4As shown, when the outrigger is not needed to support the main truss 1, the lower vertical leg 3024 can be rotated around the upper vertical leg 3031 towards the main truss 1 by the rotation motor 3033 and the rotating pin shaft 3032, and drive the outrigger U-beam 304 and a pair of the small outriggers 305 to rotate together to lift the outrigger; similarly, when the outrigger is used to support the main truss 1, the lower vertical leg 3024 can also be rotated around the upper vertical leg 3031 towards the bridge deck by the rotation motor 3033 and the rotating pin shaft 3032, and drive the outrigger U-beam 304 and a pair of the small outriggers 305 to rotate together to lower the outrigger.

[0060] In another embodiment, the outrigger system 3 includes four outriggers. The four outriggers are, from front to back in the bridge erection direction, the first middle outrigger 31, the second middle outrigger 32, the first rear outrigger 33, and the second rear outrigger 34 in sequence; a second oil cylinder 308 is further arranged between any small outrigger 305 of the second middle outrigger 32 and the outrigger U-beam 304. Its fixed end is fixedly connected with the outrigger U-beam 304, and its telescopic end is fixedly connected with the small outrigger 305.

[0061] In this technical solution, as Figure 3 shown, considering that during the process of the bridge erection machine traveling across the span and hoisting the steel girder, the second middle outrigger 32 needs to switch between two height working conditions of the pier top and the bridge deck, so the second oil cylinder 308 is added to the second middle outrigger 32 to expand the length adjustment range of the second middle outrigger 32. When the second middle outrigger 32 falls on the bridge deck, its length can be finely adjusted by the first oil cylinder 306; when the second middle outrigger 32 falls on the pier top, the second oil cylinder 308 is used to jack up and further extend the second middle outrigger 32, and the distance between it and the pier top is finely adjusted by the first oil cylinder 306.

[0062] In another embodiment, the hoisting device 4 includes:

[0063] Two hoisting cross beams 41. Any hoisting cross beam 41 is arranged transversely above the main truss 1 and is slidably connected with the upper end surface of the main truss 1;

[0064] A hoisting trolley 43 is slidably arranged above any hoisting cross beam 41. The hoisting trolley 43 can move along the axis direction of the hoisting cross beam 41 under the action of the drive motor 42.

[0065] In this technical solution, as Figure 5As shown, the hoisting device 4 is used to hoist the steel beam to be installed. The hoisting trolleys 43 on the two truss crane crossbeams 41 respectively lift the two ends of the steel beam, and the two truss crane crossbeams 41 drive the steel beam to move along the longitudinal direction of the bridge. The driving motor 42 drives the hoisting trolley 42 to move along the axis direction of the truss crane crossbeam 41, that is, the position of the steel beam in the transverse direction of the bridge is adjusted through the hoisting trolley 43. The truss crane crossbeam 41 and the hoisting trolley 43 cooperate to move the steel beam above the designed position.

[0066] In another embodiment, it further includes a plurality of lifting devices 5. Any of the lifting devices 5 includes:

[0067] A lifting crossbeam 51, which is fixedly arranged below the main truss 1 in the transverse direction of the bridge;

[0068] A plurality of jacks 53, any of the jacks 53 is fixedly arranged vertically above the lifting crossbeam 51; the telescopic end of any of the jacks is fixedly connected with a lifting steel strand 52, and the other end of the lifting steel strand 52 is fixedly connected with the already erected steel beam;

[0069] The jack 53 lifts the lifting steel strand 52 upward to pre-tension the already erected steel beam.

[0070] In this technical solution, when pouring the concrete slab, as Figure 6 shown, the lifting device 5 can be erected at the position where the lifting force needs to be provided. One end of the lifting steel strand 52 is fixedly connected with the corresponding steel beam, and the jack 53 lifts the other end of the lifting steel strand 52 upward, so as to provide an upward lifting force for the corresponding steel beam, enabling it to bear the load of the concrete slab, reducing the requirements for the erection performance of the bridge erection machine, and avoiding increasing the steel consumption in order to improve the performance of the bridge erection machine.

[0071] A construction method for a bridge erection machine used in the overall erection construction of the upper structure of a long-span bridge. In the starting condition: along the bridge erection direction, the N1 pier, the N1 section steel beam 5, the N2 pier, the N2 section steel beam 6, the N3 pier, the N3 section steel beam 7, the N4 pier, the N5 pier, and the N6 pier have been installed. The front support 2 is located at the top of the N4 pier. The first middle support leg 31 and the second middle support leg 31 are located at the front of the main truss 1. The first rear support leg 33 is located in the middle and rear of the main truss 1. The second rear support leg 34 is located at the tail of the main truss 1. It is characterized by including the following steps:

[0072] S1. Lift the front outrigger 2 and the second rear outrigger 34. The second middle outrigger 32 and the first rear outrigger 33 are respectively supported on the steel girder of N3 section 6 and the steel girder of N2 section. Move the hoisting device 4 to the tail of the main truss 1, and move the main truss 1 forward until the front support 2 is supported on the top of the N5 pier, completing the first span passing, that is, moving forward one span.

[0073] As Figure 1 shown, first release the fixed connection between the front support 2 and the top of the N4 pier, release the fixed connection between the second rear outrigger 34 and the steel girder of N2 section 6, and lift the second rear outrigger 34. Fix the second middle outrigger 32 and the first rear outrigger 33 to the steel girder of N3 section 7 and the steel girder of N2 section 6 respectively to support the main truss 1. Move the hoisting device 4 to the tail of the main truss 1 to prepare for subsequent beam feeding. Drive the main truss 1 forward through the driving devices on the second middle outrigger 32 and the first rear outrigger 33 until the front support 2 is located on the top of the N5 pier. Fix the front support 2 to the top of the N5 pier. At this time, the main truss 1 moves forward one span. It should be noted that the front support 2 is arranged at the forefront of the main truss and is a rigid columnar structure formed by splicing multiple support sections. Lifting the front support 2 means releasing its fixed connection with the pier top.

[0074] S2. Lift the second middle outrigger 32, move the first middle outrigger 31 and the second middle outrigger 32 above the N5 pier, lower the second middle outrigger 32 so that it is supported on the top of the N5 pier; lower the second rear outrigger 34 so that it is supported on the steel girder of N2 section 6, lift the first rear outrigger 33, move the first rear outrigger 33 forward to the front end of the steel girder of N3 section and then lower it so that it is supported on the steel girder of N3 section 7.

[0075] As Figure 7 shown, first release the fixed connection between the second middle outrigger 32 and the steel girder of N3 section 7, start the driving devices on the first middle outrigger and the second middle outrigger 32, and make them move forward together above the top of the N5 pier, and lower the second rear outrigger to fix it to the top of the N5 pier. Lower the second rear outrigger 34 and fix it to the steel girder of N2 section 6. Lift the first rear outrigger 33, start the driving device on the first rear outrigger 33, move the first rear outrigger 33 to the front end of the steel girder of N3 section 7 and fix it to the steel girder of N3 section 7.

[0076] S3. Lift the front support 2 and the second rear outrigger 34, move the main truss 1 forward until the front support 2 is supported on the top of the N6 pier, lower the second rear outrigger 34 so that it is supported on the steel girder of N3 section 7, completing the second span passing.

[0077] As shown Figure 8 in the figure, first, the fixed connection between the front support 2 and the top of the N5 pier is released, and the fixed connection between the second rear leg 34 and the N2 section steel beam 6 is released. The driving devices on the second middle leg 32 and the first rear leg 33 drive the main truss 1 to move forward until the front support 2 is located on the top of the N6 pier. The front support 2 is fixedly connected to the top of the N6 pier, and the second rear leg 34 is lowered to be fixedly connected to the N3 section steel beam 7. At this time, the main truss 1 moves forward one span further to complete the second hole passing.

[0078] S4. Use the lifting device 4 to lift the to-be-installed N5 section steel beam 8, move the two truss crane crossbeams 41 forward until the N5 section steel beam 8 reaches above the second hole, adjust the position of the lifting trolley 43 on the truss crane crossbeam 41 so that the N5 section steel beam 8 is located above the designed position, and lower the N5 section steel beam 8 to the tops of the N5 pier and the N6 pier; lower the first middle leg 31 to support it on the N5 section steel beam 8, and lift the second middle leg 32; then use the same method to install the N4 section steel beam 9 above the first hole to complete the erection of the steel beams for two holes;

[0079] As shown Figure 9 in the figure, first, the beam carrier transports the N5 section steel beam 8 to the lower part of the lifting device 4 for beam feeding, hoist the N5 section steel beam 8, and adjust the N5 section steel beam 8 to above the designed position through the cooperation of the truss crane crossbeam 41 and the lifting trolley 43, and then lower the N5 section steel beam 8 to the tops of the N5 pier and the N6 pier; lower the first middle leg 31 to fixedly connect it to the N5 section steel beam 8. Lift the second middle leg 32 so that it does not interfere with the hoisting of the N4 section steel beam 9; return the lifting device 4 to the tail of the main truss 1, and at the same time, the beam carrier transports the N4 section steel beam 9 to the lower part of the lifting device 4 for beam feeding and hoist the N4 section steel beam 9. Similarly, adjust the N4 section steel beam 9 to above the designed position through the cooperation of the truss crane crossbeam 41 and the lifting trolley 43, and then lower the N4 section steel beam 9 to the tops of the N4 pier and the N5 pier, as shown Figure 10 in the figure, to complete the erection of the upper steel beams for two holes.

[0080] In another embodiment, after installing all the steel beams, the bridge deck is installed. The installation of the bridge deck specifically includes the following steps:

[0081] S5. Move the two girder suspension beams 41 back to the tail of the main truss 1. Use the hoisting device 4 to lift the bridge deck to be installed. Move the two girder suspension beams 41 forward until the bridge deck reaches above the N5 section steel beam 8. Adjust the position of the hoisting trolley 43 on the girder suspension beam 41 so that the bridge deck is above the designed position.

[0082] S6. Install the lifting device 5 at the position where the lifting force is required, and apply the lifting force to the N5 section steel beam 8. Lower the bridge deck and install it on the N5 section steel beam 8. Then load the lifting force in the lifting device 5 to the final design requirement. Install the bridge deck on the N4 section steel beam 9 in the same way.

[0083] S7. Pour the wet joint concrete between the bridge decks. During this period, the bridge girder erecting machine remains static. After the poured concrete reaches the required strength, remove the lifting device 5.

[0084] S8. Repeat steps S1 - S7 until all the steel beams and bridge decks are installed.

[0085] In another embodiment, rotate the rotating pin shafts 3032 in each of the legs to drive the lower vertical legs 3034, the leg U - beams 304 and a pair of small legs 305 in each of the legs to rotate together, so as to lift or lower each of the legs. When the legs are not needed to support the main truss 1, the lower vertical leg 3024 can be rotated around the upper vertical leg 3031 towards the main truss 1 through the rotating motor 3033 and the rotating pin shaft 3032, and drive the leg U - beam 304 and a pair of small legs 305 to rotate together to lift the legs; similarly, when the legs are used to support the main truss 1, the lower vertical leg 3024 can also be rotated around the upper vertical leg 3031 towards the bridge deck through the rotating motor 3033 and the rotating pin shaft 3032, and drive the leg U - beam 304 and a pair of small legs 305 to rotate together to lower the legs.

[0086] In another embodiment, the first oil cylinders 306 in each of the legs adjust the lengths of each of the legs to achieve the lifting or lowering of each of the legs. When the legs are used to support the main truss 1, the first oil cylinders 306 are jacked up to lower the legs until they can be fixedly connected to the pier top or the bridge deck; when the legs are not used as support members, the fixed connection of the legs is released, and the first oil cylinders 306 retract to lift the legs.

[0087] During the actual construction process, the rotating pin shafts or the first oil cylinders can be flexibly selected according to the specific situation to lift or lower each of the legs.

[0088] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. Construction method of a bridge erecting machine for the integral erection construction of the upper structure of a long-span bridge. The bridge erecting machine includes a main truss arranged longitudinally along the bridge, a lifting device slidably connected to the upper end surface of the main truss, and a front support fixedly arranged at the front end of the main truss along the longitudinal direction of the bridge. It also includes a leg system slidably connected to the main truss; the leg system includes four legs, and any one of the legs is a telescopic structure and is provided with a driving device, and the driving device drives the leg to slide on the main truss along the bridge erection direction; alternately fix several of the legs to support the main truss, and the driving device on the fixed leg drives the main truss to travel multiple spans along the bridge erection direction; The four legs are, from front to back in the bridge erection direction, the first middle leg, the second middle leg, the first rear leg, and the second rear leg in sequence; the hoisting device includes: two truss crane cross beams, any of which is arranged transversely above the main truss and is slidably connected to the upper end surface of the main truss; a hoisting trolley is slidably arranged above any of the truss crane cross beams, and the hoisting trolley can move along the axis direction of the truss crane cross beam under the action of a driving motor; in the initial working condition: in the bridge erection direction, the N1 pier, the N1 section steel beam, the N2 pier, the N2 section steel beam, the N3 pier, the N3 section steel beam, the N4 pier, the N5 pier, and the N6 pier have been installed, the front support is located at the top of the N5 pier, the first middle leg and the second middle leg are located at the front part of the main truss, the first rear leg is located at the middle and rear part of the main truss, and the second rear leg is located at the tail of the main truss. It is characterized in that the construction method includes the following steps: S1. Lift the front support and the second rear leg, support the second middle leg and the first rear leg on the N3 section steel beam and the N2 section steel beam respectively, move the hoisting device to the tail of the main truss, and move the main truss forward until the front support supports on the top of the N5 pier, completing the first hole passing, that is, advancing one span forward; S2. Lift the second middle leg, move the first middle leg and the second middle leg above the N5 pier, lower the second middle leg so that it supports on the top of the N5 pier; lower the second rear leg so that it supports on the N2 section steel beam, and lift the first rear leg; move the first rear leg forward to the front end of the N3 section steel beam and then lower it so that it supports on the N3 section steel beam; S3. Lift the front support and the second rear leg, move the main truss forward until the front support supports on the top of the N6 pier, and lower the second rear leg so that it supports on the N3 section steel beam, completing the second hole passing; S4. Use the hoisting device to hoist the to-be-installed N5 section steel beam, move the two truss crane cross beams forward until the N5 section steel beam reaches above the second hole, adjust the position of the hoisting trolley on the truss crane cross beam so that the section steel beam is above the designed position, and lower the N5 section steel beam to the tops of the N5 pier and the N6 pier; lower the first middle leg so that it supports on the N5 section steel beam, and retract the second middle leg; then install the N4 section steel beam above the first hole in the same way, completing the erection of two holes of steel beams.

2. The construction method of the bridge erecting machine for the integral erection construction of the superstructure of a long-span bridge as described in claim 1, characterized in that, Any of the legs further includes: A leg U beam, which is arranged transversely below the main truss; A pair of vertical legs, fixedly arranged at both ends of the leg U beam, and two pulley groups are arranged at intervals up and down at the top of each vertical leg; lower cross bars are arranged at the bottoms of both sides of the main truss, and slide rails matched with the pulley groups are arranged on the top surface and the bottom surface of the lower cross bar respectively; the driving device is connected to any of the pulley groups to drive the pulley groups to slide relative to the slide rails; A pair of small outriggers, any one of the small outriggers is arranged transversely to the bridge direction under the U-shaped beam of the outrigger and is hinged to the U-shaped beam of the outrigger; a plurality of first oil cylinders are embedded at the bottom of any one of the small outriggers, and the telescopic end of the first oil cylinder extends out of the bottom surface of the small outrigger and is hinged with a spherical hinge support.

3. The construction method of the bridge erecting machine for the integral erection construction of the superstructure of a long-span bridge as described in claim 2, characterized in that, Any one of the vertical legs includes an upper vertical leg and a lower vertical leg, the upper vertical leg and the lower vertical leg are rotatably connected by a rotating pin shaft, a rotating motor is arranged on the lower vertical leg, and the rotating motor drives the rotating pin shaft to rotate, driving the lower vertical leg to rotate around the upper vertical leg.

4. The construction method of the bridge erecting machine for the integral erection construction of the superstructure of a long-span bridge as described in claim 2, characterized in that, A second oil cylinder is further arranged between any one of the small outriggers of the second middle outrigger and the U-shaped beam of the outrigger, its fixed end is fixedly connected to the U-shaped beam of the outrigger, and its telescopic end is fixedly connected to the small outrigger.

5. The construction method of the bridge erecting machine for the integral erection construction of the superstructure of a long-span bridge as described in claim 2, characterized in that, It further includes a plurality of lifting devices, and any one of the lifting devices includes: A lifting cross beam, which is fixedly arranged transversely to the bridge direction under the main truss; A plurality of jacks, any one of the jacks is fixedly arranged vertically above the lifting cross beam; the telescopic end of any one of the jacks is fixedly connected with a lifting steel strand, and the other end of the lifting steel strand is fixedly connected with the already erected steel beam; The jack lifts the lifting steel strand upward to pre-tension the already erected steel beam.

6. The construction method of the bridge erecting machine for the integral erection construction of the superstructure of a long-span bridge as described in claim 5, characterized in that, After the erection of two spans of steel beams is completed, the bridge deck is installed. The installation of the bridge deck specifically includes the following steps: S5. Move the two lifting beam crossbeams back to the tail of the main truss, use the lifting device to lift the bridge deck to be installed, move the two lifting beam crossbeams forward until the bridge deck reaches above the N5 section steel beam, and adjust the position of the lifting trolley on the lifting beam crossbeam so that the bridge deck is located above the design position; S6. Install the lifting device at the position where the lifting force is required, and apply a lifting force to the N5 section steel beam; lower the bridge deck and install it on the N5 section steel beam; then load the lifting force in the lifting device to the final design requirement; install the bridge deck on the N4 section steel beam in the same way; S7. Pour the wet joint concrete between adjacent bridge decks. During this period, the bridge erection machine remains static. After the poured concrete reaches the required strength, remove the lifting device; S8. Repeat steps S1 - S7 until all the steel beams and bridge decks are installed.

7. The construction method of the bridge erecting machine for the integral erection construction of the upper structure of a long-span bridge as described in claim 3, characterized in that, Rotate the rotating pin shafts in each of the outriggers to drive the lower vertical legs, the U-shaped beams of the outriggers and a pair of small outriggers in each of the outriggers to rotate together, so as to realize the lifting or lowering of each of the outriggers.

8. The construction method of the bridge erecting machine for the integral erection construction of the superstructure of a long-span bridge as described in claim 2, characterized in that, The first oil cylinders in each of the outriggers adjust the lengths of each of the outriggers to realize the lifting or lowering of each of the outriggers.

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