Prestressed composite beam structure and mounting method

Abstract

The present application relates to the technical field of bridge construction, and discloses a prestressed composite beam structure and a mounting method. The present application comprises a bridge concrete foundation platform; a plurality of top beams are uniformly and fixedly connected to the bottom of the bridge concrete foundation platform; support columns are symmetrically and fixedly connected to the bottom of the top beams; triangular brackets are fixedly connected to opposite sides of every two adjacent support columns, and a prestressed concrete foundation platform is provided on the top of the triangular brackets. In the present application, when the top beams and inclined bracing steel beams are used to transfer the load received by the bridge concrete foundation platform to the prestressed concrete foundation platform, the tensioning of prestressing tendons is used to offset part of the load borne by the prestressed concrete foundation platform, and load-bearing rods drive support plates to convert part of the load borne by support beams into a counteracting force between the support plates and the prestressed concrete foundation platform, so as to effectively distribute the externally applied load to the support columns, the prestressing tendons and the support plates for load bearing, thereby effectively improving the load-bearing stability of the apparatus.

Description

Prestressed composite beam structure and installation method Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to a prestressed composite beam structure and its installation method. Background Technology

[0002] In the fields of building and bridge engineering, prestressed technology, as a key engineering technique, has long been regarded as an important means to improve structural performance. This technology balances some or all of the tensile stress caused by external loads by pre-applying tensile stress within structural members, which greatly enhances the load-bearing capacity and stability of the structure. Among them, prestressed composite beams, as a highly efficient structural form, have been widely used due to their superior mechanical properties and economic efficiency.

[0003] The design principle of prestressed composite beams is to effectively combine prestressing tendons with the concrete beam body, creating a prestressed stress field within the beam body through the tensioning action of the prestressing tendons. This prestressed stress field can significantly improve the crack resistance and stiffness of the beam body, thereby enhancing the load-bearing capacity and stability of the entire structure.

[0004] Traditional prestressed composite beams are typically constructed by pre-drilling ducts inside the beam structure, threading prestressing tendons through these ducts, and then tensioning and anchoring them. When the beam is subjected to external forces such as vibration or strong winds, the prestressing tendons, because they pass directly through the beam, are prone to displacement or slippage, thus affecting the stability of the entire structure. Summary of the Invention

[0005] The purpose of this application is to provide a prestressed composite beam structure and installation method to solve the following technical problem: when the beam is subjected to external forces such as vibration or strong winds, the prestressed tendons are prone to displacement or sliding because they pass directly through the beam, which affects the stability of the entire structure.

[0006] To achieve the above objectives, this application adopts the following technical solution.

[0007] A prestressed composite beam structure includes a bridge concrete abutment. Multiple top beams are uniformly fixedly connected to the bottom of the concrete abutment. Support columns are symmetrically fixedly connected to the bottom of each top beam. Triangular trusses are fixedly connected to opposite sides of each pair of adjacent support columns. A prestressed concrete abutment is supported on top of each triangular truss. Multiple prestressed tendons are uniformly arranged inside the prestressed concrete abutment. Diagonal steel beams are symmetrically fixedly connected to the bottom of each top beam. The bottom end of each diagonal steel beam is fixedly connected to the prestressed concrete abutment. A support beam is provided between adjacent support columns and installed below the prestressed concrete abutment. A lifting slot is provided at the first end of the support beam, and a force-bearing rod is inserted inside the lifting slot. The top of the force-bearing rod abuts against the prestressed concrete abutment. A support plate is symmetrically installed at the second end of the support beam, and a transmission mechanism for driving the support plate to abut against the prestressed concrete abutment is symmetrically installed at the second end of the support beam. A locking assembly for fixing the triangular trusses and the support beam is installed at one end of each support column.

[0008] By adopting the above technical solution and setting up the locking component and transmission mechanism for coordinated use, it is convenient to transfer the load received by the bridge concrete abutment to the prestressed concrete abutment when the load is transferred by the top beam and the diagonal bracing steel beam. At the same time, the tensioning of the prestressed tendons offsets part of the load borne by the prestressed concrete abutment, and pushes the force rod to drive the support plate to convert part of the load borne by the support beam into the contact force between the support plate and the prestressed concrete abutment. This facilitates the effective distribution of the externally applied load to the support column, prestressed tendons, and support plate for bearing, and effectively improves the bearing stability of the device.

[0009] Furthermore, the transmission mechanism includes a pair of guide slide rods symmetrically fixed to one end of the support beam. One end of the pair of guide slide rods is fixedly connected to a connecting plate, and the other end is slidably connected to a transmission slide plate. One end of the force-bearing rod is symmetrically hinged to a first transmission rod, and the other end of the first transmission rod is hinged to the transmission slide plate. The top of the transmission slide plate is hinged to a second transmission rod, and the middle section of the second transmission rod is hinged to a third transmission rod. The top of the second transmission rod is hinged to the support plate, and one end of the third transmission rod is hinged to the connecting plate. One end of the connecting plate is equipped with a guide component for guiding the support plate to move along the length direction of the force-bearing rod, and one end of the connecting plate is equipped with a follower component for guiding the support plate to move along the length direction of the guide slide rod.

[0010] By adopting the above technical solution and setting up the cooperation between the guiding component and the follower component, when the prestressed concrete foundation transfers the load it receives to the force-bearing rod, the force-bearing rod drives the two transmission rods one around the hinge axis to push the transmission rod two to drive the transmission slide plate to move along the length direction of the guiding rod. In conjunction with the transmission rod three, the support plate pushes the support plate upward along the length direction of the force-bearing rod to abut against the prestressed concrete foundation. This allows the force-bearing rod to convert part of the load received by the prestressed concrete foundation into the abutment support force of the support plate against the prestressed concrete foundation, thereby weakening part of the load on the prestressed concrete foundation and further improving the stability of the device.

[0011] Furthermore, the guiding assembly includes a guide block disposed on one side of the connecting plate, one end of the guide block having a guide hole, a guide slide rod sliding through the interior of the guide hole, and the top of the guide slide rod being fixedly connected to the support plate.

[0012] By adopting the above technical solution, the guide hole and guide slide rod are used in combination to facilitate the guide plate to drive the guide slide rod through the guide hole when the drive transmission rod pushes out of the hinge shaft and forms an abutment with the prestressed concrete base. This guides the plate to move along the length of the guide slide rod, thereby further improving the stability of the device.

[0013] Furthermore, the follower component includes a follower groove formed at one end of the connecting plate, and a follower slider adapted to the follower groove is symmetrically fixedly connected to one end of the guide block.

[0014] By adopting the above technical solution, the follower slide and the follower slider are used in combination, which makes it easier for the guide slide to push the follower slider to move along the length direction of the follower slide when the drive transmission rod pushes the support plate out around the hinge shaft, thereby effectively improving the smoothness of the device.

[0015] Furthermore, a lifting spring is sleeved around the guide slide rod, and the lifting spring is installed between the connecting plate and the transmission slide plate.

[0016] By adopting the above technical solution, the lifting spring is used in conjunction with the connecting plate and the transmission slide plate, which makes it easier to use the rebound characteristics of the lifting spring to push the transmission slide plate away from the connecting plate, and to cause the top of the force rod to make contact with the bottom of the prestressed concrete base, thus improving the practicality of the device.

[0017] Furthermore, the locking assembly includes a plurality of adjusting holes evenly opened at one end of the support column, a pair of locking holes I adapted to the adjusting holes are opened at one end of the tripod, a pair of locking holes II adapted to the adjusting holes are symmetrically opened at one end of the support beam, a locking screw is inserted into the adjusting hole, one end of the locking screw passes through the adjusting hole and the locking hole I or the locking hole II, and is threadedly connected to a locking nut.

[0018] By adopting the above technical solution, the adjustment hole is set up to cooperate with locking hole one, locking hole two, locking screw, and locking nut. This allows the locking hole one or locking hole two to be aligned with the corresponding adjustment hole by pulling the tripod or supporting beam according to the actual situation. Then, the locking screw and locking nut are used to quickly fix the support column to the tripod or supporting beam, which effectively improves the applicability and practicality of the device.

[0019] Furthermore, the surfaces of the top beam, supporting column, diagonal bracing steel beam, and purlin are all coated with silicone waterproof coating.

[0020] By adopting the above technical solution, the application of silicone waterproof coating effectively improves the corrosion resistance of the equipment and extends its service life.

[0021] An installation method for a prestressed composite beam structure includes:

[0022] S1: Support columns are fixedly installed on the foundation, and a top beam is fixed to the top of the support columns using bolts and other parts. Then, the concrete abutment of the bridge is constructed using the top beam as a fulcrum.

[0023] S2: A triangular truss is fixedly connected on one side of two adjacent support columns using a locking assembly, and a prestressed concrete base is erected on the top of the triangular truss. At the same time, multiple prestressed tendons for applying prestress are set inside the prestressed concrete base.

[0024] S3: The diagonal bracing steel beams are symmetrically fixedly connected to the bottom of the top beam, so that the bottom of the diagonal bracing steel beams forms a fixed contact with the prestressed concrete base.

[0025] S4: The locking assembly is used to fix the support beam between two adjacent support columns, so that the support beam drives the load-bearing rod to make contact with the prestressed concrete base. At the same time, when the load-bearing rod is subjected to the contact force of the prestressed concrete base, it works with the transmission mechanism to drive the support plate to make contact with the prestressed concrete base.

[0026] In summary, this application includes at least one of the following beneficial effects:

[0027] 1. The locking assembly and transmission mechanism are designed to work together to facilitate the transfer of the load received by the bridge concrete abutment to the prestressed concrete abutment when the load is transferred from the top beam and the diagonal bracing steel beam. The tensioning of the prestressed tendons offsets part of the load borne by the prestressed concrete abutment, while the force-bearing rod drives the support plate to convert part of the load borne by the support beam into the contact force between the support plate and the prestressed concrete abutment. This facilitates the effective distribution of the externally applied load to the support columns, prestressed tendons, and support plate for bearing, thus effectively improving the load-bearing stability of the device.

[0028] 2. The coordinated use of the guiding component and the follower component facilitates the transfer of the load received by the prestressed concrete foundation to the load-bearing rod. This allows the load-bearing rod to drive two transmission rods around the hinge axis, which in turn drive transmission rod two to move the transmission slide along the length of the guiding rod. In conjunction with transmission rod three, the support plate is pushed upward along the length of the load-bearing rod to contact the prestressed concrete foundation. This allows the load-bearing rod to convert part of the load received by the prestressed concrete foundation into the contact support force of the support plate against the prestressed concrete foundation, thereby weakening part of the load on the prestressed concrete foundation and further improving the stability of the device.

[0029] 3. The device is designed to work in conjunction with adjustment holes, locking holes one and two, locking screws, and locking nuts. This allows for easy alignment of locking holes one or two with the corresponding adjustment holes by pulling a tripod or support beam, and then using the locking screws and locking nuts to quickly and securely connect the support column to the tripod or support beam. This effectively improves the applicability and practicality of the device. Attached Figure Description

[0030] Figure 1 is a three-dimensional structural diagram of the main body of the device in this application.

[0031] Figure 2 is a schematic diagram of the connection structure between the support column and the tripod in this application.

[0032] Figure 3 is a schematic diagram of the top structure of the support beam in this application.

[0033] Figure 4 is a schematic diagram of the internal structure of the follower slide in this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Concrete abutment for bridge; 2. Top beam; 3. Support column; 4. Triangular truss; 5. Prestressed concrete abutment; 6. Prestressed tendon; 7. Diagonal bracing steel beam; 8. Support beam; 9. Lifting slot; 10. Load-bearing rod; 11. Support plate; 12. Guide slide rod; 13. Connecting plate; 14. Transmission slide plate; 15. Transmission rod one; 16. Transmission rod two; 17. Transmission rod three; 18. Guide block; 19. Guide through hole; 20. Guide slide rod; 21. Follower slide groove; 22. Follower slider; 23. Lifting spring; 24. Adjustment hole; 25. Locking hole one; 26. Locking hole two; 27. Locking screw; 28. Locking nut. Detailed Implementation

[0035] The present application will be further described in detail below with reference to Figures 1-4.

[0036] This application discloses a prestressed composite beam structure and its installation method.

[0037] Figures 1-3 illustrate a prestressed composite beam structure, comprising a bridge concrete abutment 1. Multiple top beams 2 are uniformly fixedly connected to the bottom of the bridge concrete abutment 1, and support columns 3 are symmetrically fixedly connected to the bottom of the top beams 2. Triangular trusses 4 are fixedly connected to opposite sides of adjacent support columns 3. A prestressed concrete abutment 5 is supported on the top of the triangular trusses 4, and multiple prestressed tendons 6 are uniformly arranged inside the prestressed concrete abutment 5. Diagonal bracing beams 7 are symmetrically fixedly connected to the bottom of the top beams 2, and the bottom ends of the diagonal bracing beams 7 are fixedly connected to the prestressed concrete abutment 5. A support beam 8 is provided between adjacent support columns 3, installed below the prestressed concrete abutment 5. A lifting slot 9 is provided at one end of the support beam 8, and a force-bearing rod 10 is inserted inside the lifting slot 9, with the top of the force-bearing rod 10 abutting against the prestressed concrete abutment 5. A support plate 11 is symmetrically installed at one end of the support beam 8, and a transmission mechanism for driving the support plate 11 to abut against the prestressed concrete abutment 5 is symmetrically installed at the other end of the support beam 8. One end of the support column 3 is equipped with a locking assembly for fixing the triangular truss 4 and the supporting beam 8.

[0038] In use, the prestressing is first applied to the prestressed tendons 6, which are evenly arranged inside the prestressed concrete abutment 5, using tensioning equipment. Then, the load borne by the bridge concrete abutment 1 is distributed and transferred to the top of the prestressed concrete abutment 5 using the inclined steel beam 7. At the same time, the prestressed tendons 6 are tensioned to generate a reaction force with the pressure on the top of the prestressed concrete abutment 5, which offsets part of the load on the prestressed concrete abutment 5, thereby enhancing the load-bearing capacity and crack resistance of the prestressed concrete abutment 5.

[0039] While the top beam 2 transfers the load to the prestressed concrete abutment 5, the bottom end of the prestressed concrete abutment 5 abuts against the force-bearing rod 10, and pushes the force-bearing rod 10 so that the support plate 11 abuts against the bottom of the prestressed concrete abutment 5. Thus, part of the load transferred from the prestressed concrete abutment 5 to the force-bearing rod 10 is converted into the contact force between the support plate 11 and the prestressed concrete abutment 5. This further improves the load-bearing capacity and stability of the prestressed concrete abutment 5. When external loads are applied to the bridge concrete abutment 1, the combined use of the diagonal bracing steel beam 7, the support beam 8, the force-bearing rod 10, and the support plate 11 can effectively distribute the externally applied load to the support column 3, the prestressing tendon 6, and the support plate 11 for bearing, effectively improving the load-bearing stability of the device.

[0040] Referring to Figures 2-4, the transmission mechanism includes two guide slide rods 12 symmetrically fixedly connected to one end of the support beam 8. One end of each guide slide rod 12 is fixedly connected to a connecting plate 13, and the other end is slidably connected to a transmission slide plate 14. One end of the force-bearing rod 10 is symmetrically hinged to one end of the first transmission rod 15, and the other end of the first transmission rod 15 is hinged to the transmission slide plate 14. A second transmission rod 16 is hinged to the top of the transmission slide plate 14, and a third transmission rod 17 is hinged to the middle section of the second transmission rod 16. The top of the second transmission rod 16 is hinged to the support plate 11. One end of the third transmission rod 17 is hinged to the connecting plate 13. One end of the connecting plate 13 is equipped with a guide assembly for guiding the support plate 11 to move along the length of the force-bearing rod 10 and a follower assembly for guiding the support plate 11 to move along the length of the guide slide rod 12.

[0041] The guide assembly includes a guide block 18 disposed on one side of the connecting plate 13. One end of the guide block 18 has a guide hole 19. The guide slide rod 20 slides through the guide hole 19. The top of the guide slide rod 20 is fixedly connected to the support plate 11.

[0042] The follower component includes a follower slide 21 formed at one end of the connecting plate 13, and a follower slider 22 adapted to the follower slide 21 is symmetrically fixedly connected to one end of the guide block 18.

[0043] In use, the locking assembly first fixes the support beam 8 between two adjacent support columns 3, causing the force-bearing rod 10 to come into contact with the bottom of the prestressed concrete base 5. When the prestressed concrete base 5 is subjected to the load transmitted by the diagonal bracing steel beam 7, the prestressed concrete base 5 pushes the force-bearing rod 10 downward along the length of the lifting slot 9. At the same time, the force-bearing rod 10 drives the two transmission rods 15 to move away from each other around the hinge axis, and pushes the transmission slide plate 14 to drive the transmission rod 16 to move along the length of the guide slide rod 12. Simultaneously, the transmission rod 16 drives the transmission rod 17 to push the support plate 11 upward around the hinge axis along the length of the guide slide rod 20, causing the support plate 11 to come into contact with the bottom of the prestressed concrete base 5. This allows the force-bearing rod 10 to convert part of the load received by the prestressed concrete base 5 into the contact support force of the support plate 11 on the prestressed concrete base 5, thereby weakening part of the load on the prestressed concrete base 5 and further improving the stability of the device.

[0044] While the drive transmission rod 16 pushes the support plate 11 upward around the hinge axis, the support plate 11 drives the guide slide rod 20 to slide inside the guide hole 19, thereby guiding the support plate 11 to move along the length direction of the guide slide rod 20. At the same time, when the support plate 11 is pushed out by the drive transmission rod 16 around the hinge axis, it will also push the guide slide rod 20 to drive the guide block 18 to drive the follower slider 22 to move along the length direction of the follower slide groove 21, thereby ensuring the smoothness and stability of the movement of the support plate 11.

[0045] Referring to Figures 2-4, a lifting spring 23 is sleeved around the guide slide rod 12, and the lifting spring 23 is installed between the connecting plate 13 and the transmission slide plate 14.

[0046] In use, the lifting spring 23 rebounds along the length of the guide slide rod 12 to push out the transmission slide plate 14, and the transmission slide plate 14 drives the transmission rod 15 to push out the force rod 10 around the hinge shaft. At the same time, the force rod 10 is pushed along the length of the lifting slot 9 to form an abutment with the prestressed concrete base 5, thereby effectively improving the practicality of the device.

[0047] Referring to Figures 1 and 2, the locking assembly includes multiple adjusting holes 24 evenly distributed at one end of the support column 3. One end of the triangular truss 4 is provided with a pair of locking holes 25 that are adapted to the adjusting holes 24. One end of the support beam 8 is provided with a pair of locking holes 26 that are adapted to the adjusting holes 24. A locking screw 27 is inserted into the adjusting hole 24. One end of the locking screw 27 passes through the adjusting hole 24 and the locking hole 25 or the locking hole 26, and is threadedly connected to a locking nut 28.

[0048] In use, firstly, the tripod 4 is moved to a suitable position along the length of the support column 3 by pulling it, and the locking hole 25 is aligned with the corresponding adjustment hole 24. Then, one end of the locking screw 27 is pulled through the adjustment hole 24 and the locking hole 25, and the locking nut 28 is tightened to lock the locking nut 28 to the support column 3 along the length of the locking screw 27, thereby achieving a fixed connection between the tripod 4 and the support column 3.

[0049] Then, by traction beam 8, locking hole 26 is moved along the length of support column 3 so that it is aligned with the corresponding adjustment hole 24, and the force rod 10 is driven to abut against the bottom of prestressed concrete base 5. Then, one end of locking screw 27 is pulled through adjustment hole 24 and locking hole 26 and locking nut 28 is tightened, thereby locking nut 28 along the length of locking screw 27 to support column 3, thus achieving fixed connection between beam 8 and support column 3.

[0050] This facilitates the rapid and fixed connection of the support column 3 with the triangular platform 4 and the supporting beam 8 along the length of the support column 3 according to the actual situation, effectively improving the applicability and practicality of the device.

[0051] Referring to Figures 1 and 2, the surfaces of the top beam 2, the supporting column 3, the diagonal steel beam 7, and the support beam 8 are all coated with silicone waterproof coating.

[0052] During use, by coating the surfaces of the top beam 2, support column 3, diagonal steel beam 7, and support beam 8 with silicone waterproof coating, an anti-corrosion coating is formed on the surfaces of the top beam 2, support column 3, diagonal steel beam 7, and support beam 8, thereby effectively reducing the erosion of the surfaces of the top beam 2, support column 3, diagonal steel beam 7, and support beam 8 by rainwater, and improving the structural strength and service life of the device.

[0053] An installation method for a prestressed composite beam structure includes:

[0054] S1: Fix support columns 3 on the foundation, and fix the top beam 2 on the top of the support columns 3 using bolts and other parts, and then construct the bridge concrete abutment 1 with the top beam 2 as the fulcrum.

[0055] S2: The triangular truss 4 is fixedly connected to the opposite sides of the two adjacent support columns 3 using locking components, and a prestressed concrete base 5 is erected on the top of the triangular truss 4. At the same time, multiple prestressed tendons 6 for applying prestress are set inside the prestressed concrete base 5.

[0056] S3: The diagonal bracing steel beam 7 is symmetrically fixedly connected to the bottom of the top beam 2, so that the bottom of the diagonal bracing steel beam 7 forms a fixed contact with the prestressed concrete base 5.

[0057] S4: The locking assembly is used to fix the support beam 8 between two adjacent support columns 3, so that the support beam 8 drives the force rod 10 to come into contact with the prestressed concrete base 5. At the same time, when the force rod 10 is subjected to the contact force of the prestressed concrete base 5, it cooperates with the transmission mechanism to drive the support plate 11 to come into contact with the prestressed concrete base 5.

[0058] The implementation principle of the prestressed composite beam structure and installation method of this application is as follows: First, the traction tripod 4 is moved along the length of the support column 3 to a suitable position, so that the locking hole 25 is aligned with the corresponding adjustment hole 24. Then, one end of the locking screw 27 is pulled through the adjustment hole 24 and the locking hole 25 and the locking nut 28 is tightened, so that the locking nut 28 is locked and fixed to the support column 3 along the length of the locking screw 27.

[0059] Then, the traction beam 8 moves along the length of the support column 3, thereby aligning the locking hole 26 with the corresponding adjustment hole 24, and causing the force rod 10 to come into contact with the bottom of the prestressed concrete base 5. Then, one end of the traction locking screw 27 passes through the adjustment hole 24 and the locking hole 26 and the locking nut 28 is tightened, so that the locking nut 28 is locked and fixed to the support column 3 along the length of the locking screw 27.

[0060] Next, the tensioning equipment is used to apply prestress to the multiple prestressing tendons 6 that are evenly arranged inside the prestressed concrete abutment 5. Then, the load borne by the bridge concrete abutment 1 is distributed and transferred to the top of the prestressed concrete abutment 5 by the inclined steel beam 7, while the prestressing tendons 6 are tensioned to generate a reaction force with the pressure on the top of the prestressed concrete abutment 5, thus offsetting part of the load on the prestressed concrete abutment 5.

[0061] Furthermore, while the top beam 2 transfers the load to the prestressed concrete base 5, the prestressed concrete base 5 pushes the force rod 10 downward along the length direction of the lifting slot 9. At the same time, the force rod 10 drives the two transmission rods 15 to move away from each other around the hinge axis, and pushes the transmission slide plate 14 to drive the transmission rod 16 to move along the length direction of the guide slide rod 12. Meanwhile, the transmission rod 16 drives the transmission rod 17 to push the support plate 11 upward around the hinge axis along the length direction of the guide slide rod 20, and causes the support plate 11 to come into contact with the bottom of the prestressed concrete base 5.

[0062] At the same time, the support plate 11 drives the guide slide rod 20 to slide inside the guide hole 19, thereby guiding the support plate 11 to move along the length direction of the guide slide rod 20. When the support plate 11 is pushed out by the transmission rod 16 around the hinge shaft, it will also push the guide slide rod 20 to drive the guide block 18 to drive the follower slider 22 to move along the length direction of the follower slide groove 21, thereby ensuring the smoothness and stability of the movement of the support plate 11.

Claims

1. A prestressed composite beam structure, comprising a bridge concrete abutment (1), characterized in that: The bottom of the concrete abutment (1) of the bridge is uniformly and fixedly connected with multiple top beams (2). The bottom of each top beam (2) is symmetrically and fixedly connected with support columns (3). A triangular truss (4) is fixedly connected to the opposite side of each pair of adjacent support columns (3). A prestressed concrete abutment (5) is erected on the top of each triangular truss (4). Multiple prestressed tendons (6) are uniformly arranged inside the prestressed concrete abutment (5). The bottom of each top beam (2) is symmetrically and fixedly connected with diagonal steel beams (7). The bottom end of each diagonal steel beam (7) is fixedly connected to the prestressed concrete abutment (5). A support column is provided between each pair of adjacent support columns (3). A support beam (8) is installed below the prestressed concrete base (5). The first end of the support beam (8) is provided with a lifting slot (9). A force rod (10) is inserted inside the lifting slot (9). The top of the force rod (10) abuts against the prestressed concrete base (5). A support plate (11) is symmetrically installed at the second end of the support beam (8). A transmission mechanism for driving the support plate (11) to abut against the prestressed concrete base (5) is symmetrically installed at the second end of the support beam (8). A locking component for fixing the triangular truncated pyramid (4) and the support beam (8) is installed at one end of the support column (3).

2. The prestressed composite beam structure according to claim 1, characterized in that: The transmission mechanism includes a pair of guide slide rods (12) symmetrically fixed to the second end of the support beam (8). One end of the pair of guide slide rods (12) is fixedly connected to a connecting plate (13), and the other end is slidably connected to a transmission slide plate (14). One end of transmission rod one (15) is symmetrically hinged to one end of the force-bearing rod (10), and the other end of transmission rod one (15) is hinged to the transmission slide plate (14). Transmission rod two (16) is hinged to the top of the transmission slide plate (14). A transmission rod three (17) is hinged to the middle section of rod two (16). The top of the transmission rod two (16) is hinged to the support plate (11). One end of the transmission rod three (17) is hinged to the connecting plate (13). One end of the connecting plate (13) is equipped with a guide component for guiding the support plate (11) to move along the length direction of the force rod (10). One end of the connecting plate (13) is also equipped with a follower component for guiding the support plate (11) to move along the length direction of the guide slide rod (12).

3. The prestressed composite beam structure according to claim 2, characterized in that: The guiding assembly includes a guide block (18) disposed on one side of the connecting plate (13). One end of the guide block (18) is provided with a guide hole (19). The guide slide rod (20) slides through the interior of the guide hole (19). The top of the guide slide rod (20) is fixedly connected to the support plate (11).

4. The prestressed composite beam structure according to claim 2, characterized in that: The follower component includes a follower slide groove (21) opened at one end of the connecting plate (13), and a follower slider (22) adapted to the follower slide groove (21) is symmetrically fixedly connected to one end of the guide block (18).

5. The prestressed composite beam structure according to claim 2, characterized in that: A lifting spring (23) is sleeved around the guide slide (12), and the lifting spring (23) is installed between the connecting plate (13) and the transmission slide plate (14).

6. The prestressed composite beam structure according to claim 1, characterized in that: The locking assembly includes a plurality of adjusting holes (24) evenly opened at one end of the support column (3). One end of the tripod (4) is provided with a pair of locking holes (25) adapted to the adjusting holes (24). One end of the support beam (8) is provided with a pair of locking holes (26) adapted to the adjusting holes (24). A locking screw (27) is inserted into the adjusting hole (24). One end of the locking screw (27) passes through the adjusting hole (24) and the locking hole (25) or the locking hole (26), and is threadedly connected to a locking nut (28).

7. The prestressed composite beam structure according to claim 1, characterized in that: The surfaces of the top beam (2), support column (3), diagonal bracing steel beam (7), and support beam (8) are all coated with silicone waterproof coating.

8. The installation method of a prestressed composite beam structure according to any one of claims 1-7, characterized in that, include: S1: Fix support columns (3) on the foundation, and fix the top beam (2) on the top of the support columns (3) using bolts and other parts, and then construct the bridge concrete abutment (1) with the top beam (2) as the fulcrum; S2: On the opposite side of two adjacent support columns (3), a triangular platform (4) is fixedly connected using a locking assembly, and a prestressed concrete base (5) is erected on the top of the triangular platform (4). At the same time, multiple prestressed tendons (6) for applying prestress are set inside the prestressed concrete base (5). S3: The diagonal bracing steel beam (7) is symmetrically fixedly connected to the bottom of the top beam (2), so that the bottom of the diagonal bracing steel beam (7) forms a fixed contact with the prestressed concrete base (5); S4: Use locking components to fix the support beam (8) between two adjacent support columns (3), so that the support beam (8) drives the force rod (10) to abut against the prestressed concrete base (5), and at the same time, when the force rod (10) is subjected to the abutment force of the prestressed concrete base (5), it cooperates with the transmission mechanism to drive the support plate (11) to abut against the prestressed concrete base (5).

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