Three-dimensional reconstruction and extension girder erection device and use method thereof

Abstract

The invention discloses a three-dimensional reconstruction and expansion main beam erecting device and a using method thereof, and relates to the technical field of main beam erecting equipment, the three-dimensional reconstruction and expansion main beam erecting device comprises a beam transporting vehicle, a self-walking bracket for transporting a main beam to a cover beam is arranged on the beam transporting vehicle, and a hydraulic jacking device for jacking the self-walking bracket is arranged on the beam transporting vehicle. And through cooperation of the beam transporting vehicle, the hydraulic jacking device and the self-walking bracket, the main beam can be conveniently moved to the cover beam to be installed, the main beam is erected conveniently and rapidly, and practicability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of main beam erection equipment, and in particular to a main beam erection device for three-dimensional reconstruction and expansion and a use method thereof. Background Art

[0002] The construction location of the three-dimensional reconstruction and expansion project of the expressway often overlaps with the existing expressway section. Under saturated traffic conditions, the traffic flow near the expressway is complex and the construction scope is limited. Conventional construction methods require closing traffic and occupying the road for equipment transportation and bracket erection, and then erecting the main beam. This traffic restriction solution is difficult to implement in the interchange section of important nodes, so a new construction solution is urgently needed to solve the construction complexity problem.

[0003] During the installation of large-scale prefabricated box girders and steel-concrete composite beams, accurate positioning of the main beam is crucial. Any positioning deviation will affect the docking accuracy of subsequent beam sections and the overall linear control of the bridge. Therefore, the construction equipment is required to have high-precision positioning capabilities and be able to adjust the installation deviation in real time to ensure the accuracy and integrity of the structure. Due to the heavy weight of large-scale beams, structural stability problems may occur during the installation process, especially during hoisting operations, because the center of gravity of the construction equipment is high, and the safety requirements of the operating surface are increased. For this reason, necessary temporary supports, stabilizing piles or reinforcement measures must be taken during the installation process to ensure the structural stability and safety of the beam before the erection and connection are completed. These measures can effectively reduce operational risks and ensure the stable installation of the beam under high-precision positioning.

[0004] At present, the use of bridge erection machines for main beam erection can effectively solve the problem of large-scale main beam erection, but the existing solution has high equipment costs, high installation and maintenance costs, and strict requirements on the load and force of the bridge structure design during the construction phase. It has high technical requirements and complex operations, and is extremely inconvenient to transport. Although the gantry is smaller than the bridge erection machine, its equipment disassembly and transportation is still relatively complicated, especially in narrow construction sites. The handling and reassembly of the equipment takes a lot of time. Therefore, how to keep the existing highway unobstructed while advancing the construction in an orderly manner and completing the main beam erection safely and efficiently has become an urgent problem to be solved.

[0005] For example, the announcement number CN109629448A disclosed a device for synchronously erecting main beams and bridge decks on April 16, 2019, which relates to the field of bridge engineering technology, including a main beam erection assembly and a bridge deck erection assembly, wherein the main beam erection assembly includes a frame, a main beam lifting mechanism and a walking mechanism, the main beam lifting mechanism is arranged on the frame, and is used to lift the main beam segment; the walking mechanism is connected to the lower end of the frame, and is used to drive the frame to move. The bridge deck erection assembly includes a bridge deck lifting mechanism, a track and a mobile crane, the bridge deck lifting mechanism is used to lift the bridge deck, and then transfer the bridge deck to the mobile crane; the track is arranged under the frame; the mobile crane is arranged on the track and can move along the track. The main beam erection device disclosed above has a complex structure, and the transportation and reassembly of the equipment takes a lot of time, and its practicality is poor. Summary of the invention

[0006] The purpose of the present invention is to provide a more practical three-dimensional expansion main beam erection device and its use method. The present invention realizes the convenient movement of the main beam to the cap beam for installation through the cooperation of the beam transport vehicle, the hydraulic jacking device and the self-propelled bracket. The erection of the main beam is convenient and fast, and has higher practicality.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve its technical problem is: a three-dimensional reconstruction and expansion main beam erection device, including a beam transport vehicle, the beam transport vehicle is provided with a self-propelled bracket for transporting the main beam to the cap beam, and the beam transport vehicle is provided with a hydraulic jacking device for jacking the self-propelled bracket.

[0008] The hydraulic jacking device comprises a jacking platform, a telescopic bracket and a jacking hydraulic cylinder. The jacking platform is connected to the beam transport vehicle through the telescopic bracket, the jacking hydraulic cylinder is connected to the beam transport vehicle, and the piston of the jacking hydraulic cylinder is connected to the jacking platform.

[0009] The cap beam and the lifting platform are both provided with rack guides, the self-propelled bracket is provided with rollers, the rollers are provided with driving gears meshing with the rack guides, the self-propelled bracket is provided with a hydraulic motor connected to the driving gear, the self-propelled bracket is provided with a temporary bracket for supporting the main beam, and the cap beam is provided with a jack for supporting the main beam.

[0010] A limit stopper is provided on the rack guide rail on the cap beam.

[0011] The limit stopper is provided with gear teeth, the limit stopper is meshed with the rack guide rail, and the limit stopper is provided with a fixing plate connected with the rack guide rail.

[0012] One end of the fixing plate is connected to the limit stopper through a second bolt, and one end of the fixing plate is connected to the rack guide rail through a second bolt.

[0013] A fixing seat is provided on the rack guide rail, and the fixing seat is connected to the cap beam through a first bolt.

[0014] Anti-roll brackets are arranged on both sides of the beam transport vehicle, and ground limit blocks are arranged on the wheels of the beam transport vehicle.

[0015] The cap beam is provided with a pier column, the pier column is provided with a support frame, the support frame is provided with an operating platform, and the operating platform is provided with a fence.

[0016] A method for using the above-mentioned three-dimensional expansion main beam erection device, the specific steps are as follows:

[0017] S1, after the main beam is transported to the site by a beam transporter, it is parked at a predetermined position, the ground at the anti-rollover support is compacted, and the anti-rollover support is erected;

[0018] S2, according to the size of the cap beam, the rack guide rail is laid on the cap beam in sections, and according to the number of main beams crossing the cap beam, multiple self-propelled brackets are fixed on the main beam, and the spacing between them is set according to the spacing of the rack guide rails on the cap beam;

[0019] S3, when the hydraulic jacking device is moved, the installation of the ground anti-roll support needs to ensure that the foundation has been processed to meet the bearing capacity requirements, and the brake limit block of the hydraulic jacking device is installed on the wheel of the beam transport vehicle to complete the installation of the hydraulic jacking device;

[0020] S4, start the hydraulic lifting device to lift the main beam in sections, monitor the lifting equipment movement in real time during the lifting process to ensure that the lifting process is smooth and there is no eccentricity, until the predetermined height is reached, the lifting platform and the rack guide rail on the cap beam are connected;

[0021] S5, start the hydraulic motor to rotate the driving gear, so that the driving gear drives the roller to move along the rack guide rail on the cap beam, and then push the self-propelled bracket to carry the main beam as a whole to move horizontally by relying on the roller positioning. During the movement, the moving speed and path of the main beam are monitored to ensure that it moves parallel to the predetermined rack guide rail direction, and the traction rate and force are adjusted at any time. When the main beam approaches the designed position, the moving speed is slowly reduced;

[0022] S6, the main beam is translated to the predetermined area through the guide rail on the cap beam, and a fixed limit block is immediately installed, the limit block is fixed to the rack guide rail through a second fixing bolt and a fixing plate, and the movement of the self-propelled bracket and the main beam is restricted;

[0023] S7, use a jack to support the main beam at a predetermined position, after the support is installed, remove the jack and dismantle the rack guide rail on the cap beam that needs to be dismantled;

[0024] S8: After the previous main beam is installed in place and the wet joint reaches the design strength, repeat S2 to S8 and install the subsequent main beams in place until the bridge deck construction is completed.

[0025] The beneficial effects of the present invention are:

[0026] The main beam can be conveniently moved to the cap beam for installation through the cooperation of the beam transporter, hydraulic jacking device and self-propelled bracket. The erection of the main beam is convenient and fast, and more practical.

[0027] During the installation of the main beam, the subsequent lifting operation of the main beam can be taken into account. It has powerful functions, improves the assembly rate of bridge construction, is easy to operate and has high efficiency. Due to the small size and high integration of the construction equipment, it can be constructed at multiple points at the same time to achieve the installation of multiple sections of main beams, solving the problems of transportation and traffic maintenance during the three-dimensional reconstruction and expansion of expressways, minimizing the impact on the surrounding environment, achieving safe construction, efficient traffic maintenance and good social benefits, and providing an effective solution for the three-dimensional reconstruction and expansion of urban expressways;

[0028] The present invention controls the lifting height of the main beam by designing a hydraulic jacking system, and adjusts the position by the beam transport vehicle so that the jacking platform can be connected with the guide rail of the cap beam. Rack guide rails are arranged in sections on the cap beam to facilitate the installation and disassembly of the guide rails, save space on the cap beam, and facilitate the placement of the main beam. The main beam is moved by driving the gear through a hydraulic motor, which has a stable lateral movement function, meets the lateral and precise installation of the large-span main beam, and takes into account the overall installation of the main beam. This solution has the characteristics of efficient and convenient operation, successfully copes with the transportation, installation and traffic maintenance problems in the process of three-dimensional reconstruction and expansion of expressways, minimizes the impact on the surrounding environment, and meets the higher requirements of safe construction and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional view of the bridge erection construction equipment of the present invention in a non-jacking installation working condition;

[0030] Figure 2 It is a front view of the bridge erection construction equipment of the present invention in a non-jacking installation working condition;

[0031] Figure 3 A top view of the bridge erection construction equipment of the present invention in a non-jacking installation working condition;

[0032] Figure 4 It is a front view of the self-propelled bracket of the bridge erection construction equipment of the present invention;

[0033] Figure 5 It is a cross-sectional view of the bridge erection construction equipment of the present invention when the main beam is lifted and connected with the cap beam;

[0034] Figure 6It is a front view of the bridge erection construction equipment of the present invention when the main beam is lifted and connected with the cap beam;

[0035] Figure 7 It is a schematic diagram of the self-propelled bracket of the present invention being docked and fixed;

[0036] Figure 8 It is a cross-sectional view of the bridge erection construction equipment of the present invention when the main beam is lifted and connected with the cap beam;

[0037] Fig. 9 It is a schematic diagram of the parking and braking working condition of the self-propelled bracket of the bridge erection construction equipment of the present invention;

[0038] Fig.10 It is a front view of the rack guide rail of the bridge erection construction equipment of the present invention;

[0039] Fig.11 The present invention is a top view of the rack guide rail of the bridge erection construction equipment.

[0040] In the attached figure: 1-main beam; 2-support; 3-cap beam; 4-beam transporter; 5-hydraulic jacking device; 6-jacking platform; 7-self-propelled bracket; 8-hydraulic motor; 9-roller; 10-driving gear; 11-rack guide; 12-limit block; 13-ground limit block; 14-anti-roll bracket; 15-bracket fixing pad; 16-telescopic bracket; 17-jacking hydraulic cylinder; 18-first bolt; 19-limiter fixing plate; 20-second bolt; 21-support frame; 22-operating platform; 23-guardrail; 24-temporary bracket; 25-jack; 26-fixed seat. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0043] like Figure 1-11 As shown, the main beam erection device for the three-dimensional reconstruction and expansion includes a beam transport vehicle 4, on which is provided a self-propelled bracket 7 for transporting the main beam 1 to the cap beam 3, and on which is provided a hydraulic jacking device 5 for jacking the self-propelled bracket 7. Specifically, the two ends of the main beam 1 are moved by two beam transport vehicles 4 and two self-propelled brackets 7, and when the main beam 1 is moved to the cap beam 3, it is installed through the production 2.

[0044] When in use, the main beam 1 is installed on the self-propelled bracket 7, and the self-propelled bracket 7 is placed on the hydraulic jacking device 5 of the beam transport vehicle 4. The beam transport vehicle 4 works to move the self-propelled bracket 7 and the main beam 1 to the side end of the cap beam 1. At this time, the hydraulic jacking device 5 works to move the self-propelled bracket 7 and the main beam 1 to be flush with the cap beam 3. At this time, the self-propelled bracket 7 works to move the main beam 1 to the cap beam 3 for installation. The installation of the main beam 1 on the cap beam 3 is convenient and quick, and the entire device can be flexibly constructed in a small space, which minimizes the impact on the existing road traffic and is more practical.

[0045] Reference Figure 8 The hydraulic jacking device 5 includes a jacking platform 6, a telescopic bracket 16 and a jacking hydraulic cylinder 17. The jacking platform 6 is connected to the beam transport vehicle 4 through the telescopic bracket 16. The jacking hydraulic cylinder 17 is connected to the beam transport vehicle 4. The piston of the jacking hydraulic cylinder 17 is connected to the jacking platform 6. The jacking hydraulic cylinder 17 works so that the piston drives the jacking platform 6 to move upward, thereby preventing the self-propelled bracket 7 on the jacking platform 6 from moving. When the jacking platform 6 moves, the telescopic bracket 16 moves, and the movement of the jacking platform 6 is limited by the telescopic bracket 16. Specifically, the beam transport vehicle 4 is provided with four jacking hydraulic cylinders 17, and the four jacking hydraulic cylinders 17 are distributed in a rectangular shape, and the beam transport vehicle 4 is provided with four groups of telescopic brackets 16, and each group of telescopic brackets 16 is cross-arranged, so as to stably support the jacking platform 6. Specifically, the telescopic bracket is a support frame with adjustable height and length, which is often used to support building structures, exhibits or other heavy objects. They are usually made of metal or plastic, with an adjustable design, and the height and length can be freely adjusted according to needs.

[0046] Reference Figure 1-11The cap beam 3 and the lifting platform 6 are both provided with a rack guide 11, the self-propelled bracket 7 is provided with a roller 9, the roller 9 is provided with a driving gear 10 meshing with the rack guide 11, and the self-propelled bracket 7 is provided with a hydraulic motor 8 connected to the driving gear 10. The hydraulic motor 8 works to make the driving gear 10 move stably on the rack guide 11, and the roller 9 moves on the cap beam 3. The self-propelled bracket 7 is stably moved from the lifting platform 6 to the cap beam 3 through the cooperation of the hydraulic motor 8 and the driving gear 10, and it is convenient to stably move the main beam 1 falling on the self-propelled bracket 7. The self-propelled bracket 7 is provided with a temporary bracket 24 for supporting the main beam 1, and the main beam 1 is supported by the temporary bracket 24. For support, a jack 25 for supporting the main beam 1 is provided on the cap beam 3. When the self-propelled bracket 7 moves the main beam 1 to the specified position on the cap beam 3, the main beam 1 is lifted from the temporary support 24 by the jack 25, so that the support 2 is installed on the main beam 1 and the cap beam 3. Specifically, a bracket fixing pad 15 is provided on the self-propelled bracket 7, and the bracket fixing pad 15 is in contact with the temporary support 24, so that the bracket fixing pad 15 supports the temporary support 24, thereby facilitating the stable placement of the temporary support 24 on the self-propelled bracket 7. Specifically, the temporary support 24 is detachably connected to the self-propelled bracket 7. In this embodiment, the self-propelled bracket 7 is connected to the temporary support 24 by bolts.

[0047] Reference Fig. 9 A limit block 12 is provided on the rack guide rail 11 on the cap beam 3, and the limit block 12 is used to limit the movement of the self-propelled bracket 7, thereby ensuring that the self-propelled bracket 7 and the main beam 1 move accurately to the specified position of the cap beam 3.

[0048] Specifically, the limit stop 12 is provided with gear teeth, and the limit stop 12 is meshed with the rack guide 11, so as to ensure that the limit stop 12 is stably placed on the rack guide 11. The limit stop 12 is provided with a fixing plate 19 connected to the rack guide 11, and the limit stop 12 is stably placed on the rack guide 11 through the fixing plate 19. Specifically, two fixing plates 19 are provided on both sides of each limit stop 12, and the two fixing plates 19 are arranged in an inverted V shape.

[0049] One end of the fixing plate 19 is connected to the limit stop 12 through the second bolt 20, and one end of the fixing plate 19 is connected to the rack guide rail 11 through the second bolt 20. The fixing plate 19 and the limit stop 12 are conveniently disassembled and assembled on the rack guide rail 11 through the second bolt 20. Specifically, the fixing plate 19 is provided with a through hole for the second bolt 20 to pass through, and the rack guide rail 11 and the limit stop 12 are provided with threaded holes that cooperate with the second bolt 20.

[0050] A fixing seat 26 is provided on the rack guide rail 11, and the fixing seat 26 is connected to the cap beam 3 through a first bolt 18. The fixing seat 26 and the first bolt 18 enable convenient disassembly and assembly of the rack guide rail 11 on the cap beam 3, thereby facilitating the removal of the rack guide rail 11 from the cap beam 3 after the main beam 1 is installed.

[0051] Reference Figure 1 and 2 Anti-roll brackets 14 are provided on both sides of the beam transport vehicle 4, and ground limit blocks 13 are provided at the wheels of the beam transport vehicle 4. The anti-roll brackets 14 and the ground limit blocks 13 cooperate with each other to prevent the hydraulic jacking device 5 on the beam transport vehicle 4 from overturning during operation. Specifically, two anti-roll brackets 14 are provided, and four ground limit blocks 13 are provided.

[0052] A pier is provided on the cap beam 3, a support frame 21 is provided on the pier, an operating platform 22 is provided on the support frame 21, a fence 23 is provided on the operating platform 22, the operating platform 22 provides a working space for the workers, and the guardrail 23 improves the working safety of the workers. Specifically, the support frame 21 is connected to the pier by bolts, and is connected to the operating platform 22 by bolts on the support frame 21, and an oblique support is provided on the support frame 21, and both ends of the oblique support are respectively connected to the support frame 21 and the operating platform 22, so as to realize the stable placement of the operating platform 22, and the guardrail 23 is at the edge of the operating platform 22, so as to ensure the protection of the workers.

[0053] A method for using the above-mentioned three-dimensional expansion main beam erection device, the specific steps of which are as follows:

[0054] S1, after the main beam 1 is transported to the site by the beam transport vehicle 4, it is parked at a predetermined position, the ground at the anti-rollover bracket 14 is compacted, and the anti-rollover bracket 14 is erected;

[0055] S2, according to the size of the cap beam 3, the rack guide rail 11 is laid on the cap beam 3 in sections, and according to the number of main beams 1 crossing the cap beam 3, a plurality of self-propelled brackets 7 are fixed on the main beam 1, and the spacing between them is set according to the spacing between the rack guide rails 11 on the cap beam 3;

[0056] S3, when the hydraulic jacking device 5 is moved, the placement of the ground anti-roll bracket 14 needs to ensure that the foundation has been processed to meet the bearing capacity requirements, and the brake limit block 13 of the hydraulic jacking device 5 is installed to the wheel of the beam transport vehicle 4 to complete the placement of the hydraulic jacking device 5;

[0057] S4, start the hydraulic lifting device 5, lift the main beam 1 in sections, monitor the lifting device movement in real time during the lifting process to ensure that the lifting process is smooth and there is no eccentricity, until the predetermined height is reached, the lifting platform 6 and the rack guide rail 11 on the cap beam 3 are connected;

[0058] S5, start the hydraulic motor 8, so that the driving gear 10 rotates, so that the driving gear 10 drives the roller 9 to move along the rack guide rail 11 on the cap beam 3, and then pushes the self-propelled bracket 7 to carry the main beam 1 as a whole to be positioned by the roller 9 for translation. During the movement, the moving speed and path of the main beam 1 are monitored to ensure that it moves parallel to the predetermined direction of the rack guide rail 11, and the traction rate and force are adjusted at any time. When the main beam approaches the designed position, the moving speed is slowly reduced;

[0059] S6, the main beam 1 is translated to the predetermined area through the guide rail on the cap beam, and the fixed limit block 12 is immediately installed. The limit block 12 is fixed to the rack guide rail 11 through the second fixing bolt 20 and the fixing plate 19 to limit the movement of the self-propelled bracket 7 and the main beam 1;

[0060] S7, using the jack 27 to support the main beam 1 at the predetermined position, after the support 2 is installed, removing the jack 27 and dismantling the rack guide rail 11 on the cap beam 3 that needs to be dismantled;

[0061] S8: After the previous main beam is installed in place and the wet joint reaches the design strength, repeat S2 to S8 and install the subsequent main beams in place until the bridge deck construction is completed.

[0062] The main beam 1 is manufactured in sections in the factory, and then transported to the assembly plant on the construction site for hoisting. The self-propelled bracket 7 is installed at the bottom of the main beam 1, and then hoisted onto the beam transport vehicle 4, and the main beam 1 on the jacking platform 6 is temporarily fixed by a temporary bracket 24, and then transported to the construction site. The temporary bracket 24 and the jacking platform 6 are detachably connected, which is convenient for the subsequent removal of the self-propelled bracket 24 and the placement of the jack 25.

[0063] Start the hydraulic pump station and lift the main beam 1 in sections according to the lifting height requirements. When the predetermined height is reached at each stage, the lifting process is paused to check the status of the lifting hydraulic cylinder 17 to ensure that the horizontal position of the main beam 1 is not offset. The main beam 1 is lifted to the height of the new bridge cap beam 3 by the hydraulic lifting device 5, the position of the lifting platform 6 is adjusted, and the rack guide rail 1 is connected on one side of the cap beam 1.

[0064] Start the hydraulic motor 8 on the self-propelled bracket 7 to jointly drive the main beam 1 to move horizontally. After the main beam reaches the cap beam 3, disconnect the hydraulic system, slowly lower the jacking platform 6, and end the jacking operation. The main beam 1 moves parallel to the rack guide 11 on the cap beam 3, and stops the hydraulic motor 8 when it reaches the limit area, and then brakes with the rack guide limit block 12. Subsequently, the main beam 1 is temporarily supported by the jack 25, and the fixing device of the self-propelled bracket 7 at the bottom of the web of the main beam 1 is removed to safely recover the self-propelled bracket 7. After the disassembly is completed, install the bridge bearing 2. After the bearing is installed in place, remove the jack 27 and place the main beam 1 on the bearing 2.

[0065] During the installation of the preceding main beam 1, the construction scheme can take into account the jacking operation of the subsequent main beam 1, and has powerful functions, which improves the assembly rate of bridge construction. The present invention effectively solves the transportation and installation construction problems of the large-span main beams of the three-dimensional reconstruction and expansion bridge, and is easy to operate and highly efficient. Since the construction equipment is small in size and highly integrated, it can be constructed at multiple points at the same time, and the installation of multiple sections of main beams can be achieved, which solves the problems of transportation and smooth traffic during the three-dimensional reconstruction and expansion of highways, minimizes the impact on the surrounding environment, achieves safe construction, efficient smooth traffic and good social benefits, and provides an effective solution for the three-dimensional reconstruction and expansion of urban highways.

[0066] The present invention controls the lifting height of the main beam 1 by designing a hydraulic jacking system, and adjusts the position by a beam transport vehicle so that the jacking platform is connected to the guide rail of the cap beam. The rack guide rails 11 are arranged in sections on the cap beam to facilitate the installation and disassembly of the guide rails, save space on the cap beam 3, and facilitate the placement of the main beam. The main beam is moved by driving the gears with a hydraulic motor, which has a stable lateral movement function, meets the lateral and precise installation of large-span main beams, and takes into account the overall installation of the main beam. This solution has the characteristics of efficient and convenient operation, successfully copes with the transportation, installation and traffic maintenance problems in the process of three-dimensional reconstruction and expansion of expressways, minimizes the impact on the surrounding environment, and meets the higher requirements of safe construction and social benefits.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-dimensional expansion main beam erection device, characterized in that: The invention comprises a beam transport vehicle (4), wherein the beam transport vehicle (4) is provided with a self-propelled bracket (7) for transporting a main beam (1) to a cap beam (3), and the beam transport vehicle (4) is provided with a hydraulic lifting device (5) for lifting the self-propelled bracket (7).

2. The main beam erection device for three-dimensional reconstruction and expansion according to claim 1, characterized in that: The hydraulic jacking device (5) comprises a jacking platform (6), a telescopic bracket (16) and a jacking hydraulic cylinder (17); the jacking platform (6) is connected to the beam transport vehicle (4) via the telescopic bracket (16); the jacking hydraulic cylinder (17) is connected to the beam transport vehicle (4); and the piston of the jacking hydraulic cylinder (17) is connected to the jacking platform (6).

3. The main beam erection device for three-dimensional reconstruction and expansion according to claim 2 is characterized in that: The cap beam (3) and the lifting platform (6) are both provided with a rack guide rail (11), the self-propelled bracket (7) is provided with a roller (9), the roller (9) is provided with a driving gear (10) meshing with the rack guide rail (11), the self-propelled bracket (7) is provided with a hydraulic motor (8) connected to the driving gear (10), the self-propelled bracket (7) is provided with a temporary bracket (24) for supporting the main beam (1), and the cap beam (3) is provided with a jack (25) for supporting the main beam (1).

4. The main beam erection device for three-dimensional reconstruction and expansion according to claim 3 is characterized in that: A limit stopper (12) is provided on the rack guide rail (11) on the cap beam (3).

5. The main beam erection device for three-dimensional reconstruction and expansion according to claim 4, characterized in that: The limit stopper (12) is provided with gear teeth, the limit stopper (12) is meshed with the rack guide rail (11), and the limit stopper (12) is provided with a fixing plate (19) connected to the rack guide rail (11).

6. The main beam erection device for three-dimensional reconstruction and expansion according to claim 5, characterized in that: One end of the fixing plate (19) is connected to the limit stopper (12) via a second bolt (20), and one end of the fixing plate (19) is connected to the rack guide rail (11) via a second bolt (20).

7. The main beam erection device for three-dimensional reconstruction and expansion according to claim 4, characterized in that: A fixing seat (26) is provided on the rack guide rail (11), and the fixing seat (26) is connected to the cap beam (3) via a first bolt (18).

8. The main beam erection device for three-dimensional reconstruction and expansion according to claim 1, characterized in that: Anti-roll brackets (14) are provided on both sides of the beam transport vehicle (4), and ground limit blocks (13) are provided at the wheels of the beam transport vehicle (4).

9. The main beam erection device for three-dimensional reconstruction and expansion according to claim 1, characterized in that: The cap beam (3) is provided with a pier column, the pier column is provided with a support frame (21), the support frame (21) is provided with an operating platform (22), and the operating platform (22) is provided with a fence (23).

10. A method for using the three-dimensional expansion main beam erection device according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1, after the main beam 1 is transported to the site by the beam transport vehicle 4, it is parked at a predetermined position, the ground at the anti-rollover bracket (14) is compacted, and the anti-rollover bracket (14) is erected; S2, laying the rack guide rail (11) on the cap beam (3) in sections according to the size of the cap beam (3), fixing a plurality of self-propelled brackets (7) on the main beam (1) according to the number of main beams (1) crossing the cap beam (3), and setting the spacing between the rack guide rails (11) on the cap beam (3); S3, when the hydraulic jacking device (5) is moved, the installation of the ground anti-roll bracket (14) needs to ensure that the foundation has been processed to meet the bearing capacity requirements, and the brake limit block (13) of the hydraulic jacking device (5) is installed on the wheel of the beam transport vehicle (4), completing the installation of the hydraulic jacking device (5); S4, start the hydraulic lifting device (5), lift the main beam (1) in sections, monitor the movement of the lifting device in real time during the lifting process to ensure that the lifting process is smooth and there is no eccentricity, until the predetermined height is reached, and the lifting platform (6) and the rack guide rail (11) on the cap beam (3) are connected; S5, start the hydraulic motor (8), so that the driving gear (10) rotates, and the driving gear (10) drives the roller (9) to move on the cap beam (3) along the rack guide rail (11), and then pushes the self-propelled bracket (7) to carry the main beam (1) as a whole and move horizontally by relying on the roller (9) for positioning. During the movement, the moving speed and path of the main beam (1) are monitored to ensure that it moves parallel to the predetermined direction of the rack guide rail (11), and the traction rate and force are adjusted at any time. When the main beam approaches the designed position, the moving speed is slowly reduced; S6, the main beam (1) is translated to a predetermined area through the guide rail on the cap beam, and a fixed limit stopper (12) is immediately installed. The limit stopper (12) is fixed to the rack guide rail (11) through a second fixing bolt (20) and a fixing plate (19), so as to limit the movement of the self-propelled bracket (7) and the main beam (1); S7, using a jack (27) to support the main beam (1) at a predetermined position, after the support (2) is installed, removing the jack (27) and disassembling the rack guide rail (11) on the cap beam (3) to be disassembled; S8: After the previous main beam is installed in place and the wet joint reaches the design strength, repeat S2 to S8 and install the subsequent main beams in place until the bridge deck construction is completed.

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