A Highly Efficient Shear Strengthening Method for Prestressed Hollow Slab Beam Bridges

Abstract

This invention discloses an efficient shear strengthening method for prestressed hollow slab beam bridges. The proposed scheme includes multiple hollow slabs arranged side-by-side, each with a through-hole. Within each through-hole are multiple equilateral and inverted triangular plates, arranged alternately. Multiple general-purpose reinforcing bars are fixedly inserted into each of the equilateral and inverted triangular plates. By rotating a third nut, a first nut, and a second nut, the stability of the equilateral and inverted triangular plates within the through-holes is increased by pulling the third, first, and second reinforcing bars, along with a fourth reinforcing bar. This strengthens the hollow slab horizontally, vertically, and longitudinally, allowing high-performance concrete to fill the space within the through-holes, thereby strengthening the entire hollow slab. Rotating a second bevel gear drives the first nut to rotate, connecting and strengthening adjacent hollow slabs, further increasing the load-bearing capacity and shear resistance of the hollow slabs.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a method for efficient shear reinforcement of prestressed hollow slab beam bridges. Background Technology

[0002] Hollow slab girder bridges are the most common type of short-span reinforced concrete bridges, possessing advantages such as small beam height and simple structure. However, with the continuous development of bridges, increasing traffic volume, and the degradation of material properties, coupled with unreasonable design, overloading, collisions, and other factors, hollow slab girders suffer from various defects. In practical engineering, conventional reinforcement methods using external cladding materials are insufficient for the complete repair of hollow slab girder bridges and require traffic interruption. Therefore, it is necessary to explore more efficient, simple, economical, and practical new reinforcement technologies for concrete hollow slab bridges without altering the structural system or disrupting traffic. Currently existing reinforcement methods include: cross-section enlargement reinforcement, adhesive reinforcement, prestressed reinforcement, structural system modification reinforcement, and beam reduction and rib addition reinforcement.

[0003] However, existing reinforcement methods still have the following shortcomings:

[0004] 1. When reinforcing hollow slabs, their shear bearing capacity for the web is insufficient, which can easily lead to cracking, peeling and other phenomena.

[0005] 2. It can only reinforce a single hollow slab, and cannot increase the stability between two adjacent hollow slabs while reinforcing them. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of insufficient shear bearing capacity of the web in the prior art, which makes it impossible to increase the stability between two adjacent hollow slabs while strengthening them. Therefore, this invention proposes a compact and efficient shear strengthening method for prestressed hollow slab beam bridges.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A highly efficient shear strengthening method for prestressed hollow slab beam bridges includes the following steps:

[0009] S1. Weld multiple connecting steel bars between adjacent equilateral and inverted triangular plates. Then, pass multiple general-purpose steel bars through the equilateral and inverted triangular plates and weld the general-purpose steel bars to the equilateral and inverted triangular plates. Pass the first and second steel bars through the equilateral triangular plates, and the first steel bar passes through the first slider. Similarly, pass the third and fourth steel bars through the inverted triangular plates, and the third steel bar passes through the second slider. Then, weld the first and second steel bars to the equilateral triangular plates and weld the third and fourth steel bars to the inverted triangular plates.

[0010] S2. Insert the welded equilateral triangle and inverted triangle into the through hole. The three corners of the equilateral triangle correspond to the first limiting block, and the three corners of the inverted triangle correspond to the second limiting block. The equilateral triangle and inverted triangle can slide along the first limiting block and the second limiting block respectively to extend into the hollow plate.

[0011] S3. When the equilateral and inverted triangle plates are moved to their respective positions, insert the second lead screw into the through hole from one side of the hollow plate. At this time, one end of the second lead screw can just correspond to the second threaded hole on the second slider. Then rotate the second lead screw to make the second lead screw threadedly connected to the second slider. Tighten the second lead screw to make the second lead screw tightly connected to the second slider. Then rotate the third nut, which is threadedly connected to the second lead screw. As the third nut rotates, the third nut pulls the second lead screw and the second slider outward, thereby increasing the stability of the third steel bar and the inverted triangle plate in the through hole.

[0012] S4. Next, insert the first lead screw into the through hole from one side of the hollow plate. The first lead screw is threadedly connected to the first threaded hole. Rotate the first lead screw to tightly connect it with the first slider. When hoisting multiple hollow plates onto the pier, arrange the multiple hollow plates side by side. When two hollow plates are side by side, the two adjacent semicircular holes form a hole. Insert the hollow sleeve into the semicircular hole. The hollow sleeve drives the rotating shaft and the second bevel gear to move downward. At this time, the third nut meshes with the first bevel gear and drives the second bevel gear to rotate through the rotating shaft. The second bevel gear drives the two adjacent first nuts to rotate through the first bevel gear. The first nut is threadedly connected to the first lead screw. As the first nut rotates, the first nut drives the first lead screw and the first slider to move towards the second bevel gear.

[0013] S5. When the two first lead screws drive the concave ring and the cylindrical block to move toward the second bevel gear, the cylindrical block can just extend into the concave ring. The concave ring drives the rack into the concave ring. The rack is engaged by the triangular locking teeth. In addition to increasing the stability of the first steel bar and the equilateral triangle plate in the through hole through the first lead screw, it can also increase the connection between the two adjacent hollow plates, further increasing the shear bearing capacity.

[0014] S6. Next, concrete is poured into the through hole through the second nut. When the through hole is filled with concrete, the drive motor is started to drive the turntable to rotate. The turntable drives the cylinder to rotate. The cylinder and the sliding groove can drive the screw, U-shaped frame and mixing plate to move up and down, which can vibrate the concrete in the through hole and fill the space in the through hole with concrete. Then, the drive motor and the second horizontal plate are removed from the hollow plate and the screw. The countersunk hole is fitted onto the screw. The countersunk hole is rotated. As the countersunk hole rotates, it drives the screw and U-shaped frame to move upward until the two arc plates are tightly attached to the second and fourth reinforcing bars respectively. This increases the vertical stability of the second and fourth reinforcing bars, the equilateral triangle plate and the second reinforcing bar in the through hole, thereby increasing the load-bearing capacity and shear resistance of the hollow plate.

[0015] Preferably, it includes multiple hollow slabs arranged side by side, each hollow slab having a through hole, each through hole containing multiple equilateral and inverted triangular plates, with the equilateral and inverted triangular plates arranged alternately, and each of the multiple equilateral and inverted triangular plates having multiple general-purpose steel bars fixedly inserted through it;

[0016] The inverted triangular plate is provided with two sets of first lateral reinforcement components to increase the stability of the inverted triangular plate within the through hole;

[0017] The equilateral triangle is provided with two sets of second lateral reinforcement components to increase the stability of the equilateral triangle within the through hole;

[0018] A connecting component is provided between two adjacent hollow slabs to increase the connectivity between them;

[0019] One side of the equilateral triangle is provided with a vertical reinforcement component to increase the vertical stability of the equilateral triangle within the through hole.

[0020] Preferably, the first transverse reinforcement component includes a third reinforcing bar that is fixedly inserted through the inverted triangular plate. A second slider is slidably connected to one side of the inverted triangular plate, and the third reinforcing bar passes through the second slider. A second threaded hole is provided on the side of the second slider away from the general reinforcing bar. A second lead rod that is threadedly connected to the second threaded hole passes through one side of the hollow plate. A fixing plate is fixedly connected to one side of the hollow plate, and the other end of the second lead rod passes through the fixing plate. A third nut that is rotatably connected to the fixing plate is threaded on the outer wall of the second lead rod.

[0021] Preferably, the second lateral reinforcement component includes a first reinforcing bar fixedly penetrating the equilateral triangle plate, a first slider slidably connected to one side of the equilateral triangle plate, and the first reinforcing bar penetrating the first slider. The side of the first slider away from the general reinforcing bar is provided with a first threaded hole. A first lead rod threadedly connected to the first threaded hole is passed through one side of the hollow plate. A triangular pad is fixedly connected to one side of the hollow plate, and the other end of the first lead rod passes through the triangular pad. A first nut rotatably connected to the triangular pad is threaded on the outer wall of the first lead rod.

[0022] Preferably, the connecting assembly includes multiple semi-circular holes disposed on one side of two hollow plates close to each other. A hollow sleeve is slidably fitted in two adjacent semi-circular holes. A rotating shaft rotatably passes through the hollow sleeve. A second bevel gear is fixedly connected to the bottom end of the rotating shaft. A concave ring is fixedly connected to the end of one first lead screw away from the hollow plate, and a cylindrical block is fixedly connected to the end of the other first lead screw away from the hollow plate. A first bevel gear is fixedly fitted on the outer wall of both first nuts, and the first bevel gear meshes with the second bevel gear. Multiple sliding grooves are provided on the inner wall of the concave ring. A sliding plate is slidably connected in the sliding groove. Multiple springs are fixedly connected to the side of the sliding plate away from the first lead screw, and the other end of the spring is fixedly connected to the inner wall of one side of the sliding groove. Multiple triangular teeth are fixedly connected to the side of the sliding plate away from the spring. Multiple racks that engage with the triangular teeth are fixedly connected to the outer wall of the cylindrical block.

[0023] Preferably, the reinforcing component includes a U-shaped frame slidably connected to one side of the equilateral triangle plate. Two first horizontal plates are fixedly connected inside the U-shaped frame. An arc plate is fixedly connected to the top of each of the two first horizontal plates, and the two arc plates are respectively used to support the second and fourth reinforcing bars. The top of the hollow plate is provided with multiple countersunk holes communicating with the through holes. A screw is fixedly connected to the top of the U-shaped frame. A second nut is threaded on the outer wall of the screw, and the countersunk hole contacts the bottom inner wall of the second nut.

[0024] Preferably, the inner wall of the through hole is fixedly connected with three first limiting blocks, and the three first limiting blocks correspond to the three corners of the equilateral triangle plate respectively. The inner wall of the through hole is fixedly connected with three second limiting blocks, and the three second limiting blocks correspond to the three corners of the inverted triangle plate respectively. The first limiting blocks and the second limiting blocks can limit the equilateral triangle plate and the inverted triangle plate, and also make it easy for the equilateral triangle plate and the inverted triangle plate to slide easily into the through hole.

[0025] Preferably, multiple connecting steel bars are fixedly connected between adjacent equilateral and inverted triangular plates. The connecting steel bars can increase the stability between adjacent equilateral and inverted triangular plates, thereby increasing the longitudinal bearing capacity and shear resistance of the hollow slab.

[0026] According to claim 5, in a method for efficient shear reinforcement of prestressed hollow slab beam bridges, a limiting ring is fixedly fitted on the outer wall of the hollow sleeve, which can limit the position of the hollow sleeve.

[0027] Preferably, multiple mixing plates are fixedly connected to both sides of the U-shaped frame, a second horizontal plate is fixedly connected to the top of the screw, a sliding groove is provided on one side of the second horizontal plate, multiple drive motors are fixedly connected to the top of the hollow plate, a turntable is fixedly connected to the output shaft of the drive motor, and a cylinder is fixedly connected to the side of the turntable that is off-center, and the cylinder slides in fit with the sliding groove. When the drive motor is started, the turntable is driven to rotate, and the turntable drives the cylinder to rotate. The fit between the cylinder and the sliding groove can drive the screw, the U-shaped frame and the mixing plates to move up and down reciprocally, thereby vibrating the high-performance concrete in the through hole, so that the high-performance concrete in the through hole fills the space in the through hole, thereby reinforcing the entire hollow plate.

[0028] Compared with the prior art, the present invention provides an efficient shear strengthening method for prestressed hollow slab beam bridges, which has the following beneficial effects:

[0029] 1. The inner wall of the concave ring of this efficient shear strengthening method for prestressed hollow slab beam bridge is provided with multiple sliding grooves. A sliding plate is slidably connected in the sliding groove. Multiple springs are fixedly connected to the side of the sliding plate away from the first lead screw, and the other end of the spring is fixedly connected to the inner wall of one side of the sliding groove. Multiple triangular teeth are fixedly connected to the side of the sliding plate away from the spring. Multiple racks that cooperate with the triangular teeth are fixedly connected to the outer wall of the cylindrical block. By rotating the second bevel gear, the first bevel gear and the first nut are driven to rotate, which in turn drives the corresponding first lead screw to move in the direction of the second bevel gear, thereby enabling the cylindrical block to be inserted into the concave ring. This allows two adjacent hollow slabs to be integrated into a whole, increasing the stability between the two adjacent hollow slabs and further increasing the load-bearing capacity and shear resistance of the hollow slab.

[0030] 2. In this method for efficient shear reinforcement of prestressed hollow slab beam bridges, a second slider is slidably connected to one side of the inverted triangular plate, and a third reinforcing bar passes through the second slider. A second threaded hole is provided on the side of the second slider away from the general reinforcing bar. A second threaded rod is threaded through one side of the hollow slab and connected to the second threaded hole. A fixing plate is fixedly connected to one side of the hollow slab, and the other end of the second threaded rod passes through the fixing plate. A third nut is rotatably connected to the fixing plate and threaded on the outer wall of the second threaded rod. By rotating the third nut, the second slider is moved outward, causing the second slider to tightly pull the third reinforcing bar, thereby increasing the stability of the inverted triangular plate in the through hole through the third reinforcing bar.

[0031] 3. In this method for efficient shear reinforcement of prestressed hollow slab beam bridges, a first slider is slidably connected to one side of the equilateral triangular plate, and a first reinforcing bar passes through the first slider. A first threaded hole is provided on the side of the first slider away from the general reinforcing bar. A first threaded rod is threaded through one side of the hollow slab and connected to the first threaded hole. A triangular pad is fixedly connected to one side of the hollow slab, and the other end of the first threaded rod passes through the triangular pad. A first nut is rotatably connected to the triangular pad by the threaded sleeve on the outer wall of the first threaded rod. The first bevel gear and the first nut are rotated by the second bevel gear. This not only allows the cylindrical block to be inserted into the concave ring, increasing the stability between two adjacent hollow slabs, but also allows the first threaded rod and the first slider to move in the direction of the second bevel gear. By traction of the first reinforcing bar, the stability of the equilateral triangular plate in the through hole is increased.

[0032] 4. In this method for efficient shear reinforcement of prestressed hollow slab beam bridges, two first horizontal plates are fixedly connected within a U-shaped frame. Each of the two first horizontal plates has a circular arc plate fixedly connected to its top, and these two circular arc plates respectively bear the second and fourth reinforcing bars. The top of the hollow slab has multiple countersunk holes communicating with through holes. A screw is fixedly connected to the top of the U-shaped frame, and a second nut is threaded onto the outer wall of the screw. Rotating the second nut causes the countersunk holes to move the screw and the U-shaped frame upwards until the two circular arc plates are tightly fitted with the second and fourth reinforcing bars, respectively. This increases the vertical stability of the second and fourth reinforcing bars, the equilateral triangle plate, and the second reinforcing bar within the through holes, thereby increasing the load-bearing capacity and shear resistance of the hollow slab.

[0033] This invention has a simple structure. By rotating the third nut, the first nut, and the second nut respectively, the stability of the equilateral and inverted triangular plates within the through hole can be increased by pulling the third, first, and second reinforcing bars and the fourth reinforcing bar. This strengthens the hollow plate from the horizontal, vertical, and longitudinal directions. In addition, after arranging multiple hollow plates side by side, rotating the second bevel gear drives the first bevel gear and the first nut to rotate, which can collect adjacent cylindrical blocks and insert them into the concave ring. While connecting and strengthening two adjacent hollow plates, the merging of the two hollow plates can also increase the load-bearing capacity and shear resistance of the hollow plate. Attached Figure Description

[0034] Figure 1 This is a first-view three-dimensional image of an efficient shear strengthening method for prestressed hollow slab beam bridges proposed in this invention.

[0035] Figure 2 This is a second-view three-dimensional diagram of an efficient shear strengthening method for prestressed hollow slab beam bridges proposed in this invention.

[0036] Figure 3 This is a three-dimensional sectional view of an efficient shear strengthening method for prestressed hollow slab beam bridges proposed in this invention.

[0037] Figure 4 This is a three-dimensional internal view of the efficient shear strengthening method for prestressed hollow slab beam bridge proposed in this invention.

[0038] Figure 5 This is a three-dimensional diagram showing the cooperation between the equilateral triangular plate and the first limiting block, and the inverted triangular plate and the second limiting block, in a method for efficient shear strengthening of prestressed hollow slab beam bridges proposed in this invention.

[0039] Figure 6 This is a three-dimensional diagram of the equilateral triangular plate and general-purpose steel reinforcement for an efficient shear strengthening method for prestressed hollow slab beam bridge proposed in this invention;

[0040] Figure 7 This is a three-dimensional diagram of the inverted triangular plate and general-purpose steel reinforcement in the efficient shear strengthening method for prestressed hollow slab beam bridge proposed in this invention;

[0041] Figure 8 A three-dimensional diagram of the U-shaped frame used in the efficient shear strengthening method for prestressed hollow slab beam bridges proposed in this invention;

[0042] Figure 9 This is a three-dimensional fit diagram of the concave ring and cylindrical block in a highly efficient shear strengthening method for prestressed hollow slab beam bridge proposed in this invention.

[0043] Figure 10 This is a three-dimensional sectional view of the concave ring in the efficient shear strengthening method for prestressed hollow slab beam bridges proposed in this invention.

[0044] Figure 11 This is a front sectional view of the efficient shear strengthening method for prestressed hollow slab beam bridges proposed in Example 2 of this invention.

[0045] In the diagram: 1. Hollow plate; 2. Through hole; 3. Right triangle plate; 4. Inverted triangle plate; 5. General-purpose reinforcing bar; 6. First reinforcing bar; 7. Second reinforcing bar; 8. Third reinforcing bar; 9. Fourth reinforcing bar; 10. First slider; 11. First threaded hole; 12. First lead screw; 13. Triangular washer; 14. First nut; 15. First bevel gear; 16. Concave ring; 17. Cylindrical block; 18. Slide groove; 19. Slide plate; 20. Spring; 21. Triangular retaining tooth; 22. Rack; 23. Semicircular hole; 24. Hollow sleeve; 25. Rotating shaft; 26. Second bevel gear; 27. U-shaped frame; 28. First horizontal plate; 29. ​​Arc plate; 30. Screw; 31. Second nut; 32. Countersunk hole; 33. Limiting ring; 34. Second slider; 35. Second lead screw; 36. Third nut; 37. Fixing plate; 38. Connecting steel bar; 39. First limiting block; 40. Second limiting block; 41. Second threaded hole; 42. Second horizontal plate; 43. Sliding groove; 44. Drive motor; 45. Turntable; 46. Cylinder; 47. Stirring plate. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0047] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Example 1:

[0049] See attached document Figure 1 —Appendix Figure 10 A highly efficient shear strengthening method for prestressed hollow slab beam bridges includes the following steps:

[0050] S1. Weld multiple connecting steel bars 38 between adjacent equilateral triangle 3 and inverted triangle 4. Then, pass multiple general steel bars 5 through equilateral triangle 3 and inverted triangle 4 and weld the general steel bars 5 to equilateral triangle 3 and inverted triangle 4. Pass the first steel bar 6 and the second steel bar 7 through equilateral triangle 3, and the first steel bar 6 passes through the first slider 10. Similarly, pass the third steel bar 8 and the fourth steel bar 9 through inverted triangle 4, and the third steel bar 8 passes through the second slider 34. Then, weld the first steel bar 6 and the second steel bar 7 to equilateral triangle 3, and weld the third steel bar 8 and the fourth steel bar 9 to inverted triangle 4.

[0051] S2. Insert the welded equilateral triangle 3 and inverted triangle 4 into the through hole 2. The three corners of the equilateral triangle 3 correspond to the first limiting block 39, and the three corners of the inverted triangle 4 correspond to the second limiting block 40. The equilateral triangle 3 and inverted triangle 4 can slide along the first limiting block 39 and the second limiting block 40 respectively to extend into the hollow plate 1.

[0052] S3. When the equilateral triangle 3 and the inverted triangle 4 are moved to the corresponding positions, the second lead screw 35 is inserted into the through hole 2 from one side of the hollow plate 1. At this time, one end of the second lead screw 35 can just correspond to the second threaded hole 41 on the second slider 34. Then, rotate the second lead screw 35 to make the second lead screw 35 threadedly connected to the second slider 34. Tighten the second lead screw 35 to make the second lead screw 35 tightly connected to the second slider 34. Then rotate the third nut 36, which is threadedly connected to the second lead screw 35. As the third nut 36 rotates, the third nut 36 pulls the second lead screw 35 and the second slider 34 outward, thereby increasing the stability of the third steel bar 8 and the inverted triangle 4 in the through hole 2.

[0053] S4. Next, insert the first lead screw 12 into the through hole 2 from one side of the hollow plate 1. The first lead screw 12 is threadedly connected to the first threaded hole 11. Rotate the first lead screw 12 to tightly connect the first lead screw 12 with the first slider 10. When multiple hollow plates 1 are hoisted onto the bridge pier, they are arranged side by side. When two hollow plates 1 are arranged side by side, two adjacent semicircular holes 23 form a hole. Insert the hollow sleeve 24 into the semicircular hole 23. The hollow sleeve 24 drives the rotating shaft 25 and the second bevel gear 26 to move downward. At this time, the third nut 36 meshes with the first bevel gear 15. The rotating shaft 25 drives the second bevel gear 26 to rotate. The second bevel gear 26 drives the two adjacent first nuts 14 to rotate through the first bevel gear 15. The first nut 14 is threadedly connected to the first lead screw 12. As the first nut 14 rotates, the first nut 14 drives the first lead screw 12 and the first slider 10 to move towards the second bevel gear 26.

[0054] S5. When the two first lead screws 12 drive the concave ring 16 and the cylindrical block 17 to move toward the second bevel gear 26 respectively, the cylindrical block 17 can just extend into the concave ring 16. The concave ring 16 drives the rack 22 into the concave ring 16. The rack 22 is engaged by the triangular locking teeth 21. In addition to increasing the stability of the first steel bar 6 and the equilateral triangular plate 3 in the through hole 2 through the first lead screw 12, it can also increase the connection between the two adjacent hollow plates 1, and further increase the shear bearing capacity.

[0055] S6. Next, concrete is poured into the through hole 2 through the second nut 31. When the concrete fills the through hole 2, the drive motor 44 is started to drive the turntable 45 to rotate. The turntable 45 drives the cylinder 46 to rotate. The cooperation between the cylinder 46 and the sliding groove 43 can drive the screw 30, the U-shaped frame 27 and the mixing plate 47 to move up and down, thereby vibrating the concrete in the through hole 2 and filling the space in the through hole 2 with concrete. Then, the drive motor 44 and the second horizontal plate 42 are removed from the hollow plate 1 and the screw 30. The countersunk hole 32 is fitted onto the screw 30. The countersunk hole 32 is rotated. As the countersunk hole 32 rotates, it drives the screw 30 and the U-shaped frame 27 to move upward until the two arc plates 29 are tightly attached to the second steel bar 7 and the fourth steel bar 9, respectively. This increases the vertical stability of the second steel bar 7, the fourth steel bar 9, the equilateral triangle plate 3 and the second steel bar 7 in the through hole 2, thereby increasing the load-bearing capacity and shear resistance of the hollow plate 1.

[0056] Reference Appendix Figure 1 - Appendix Figure 10In this invention, multiple hollow slabs 1 are arranged side by side. Each hollow slab 1 has a through hole 2. Multiple equilateral triangles 3 and inverted triangles 4 are arranged alternately within the through hole 2. Multiple general-purpose steel bars 5 are fixedly inserted into each of the equilateral triangles 3 and inverted triangles 4. Two sets of first lateral reinforcement components are provided within the inverted triangles 4 to increase their stability within the through hole 2. Two sets of second lateral reinforcement components are provided within the equilateral triangles 3 to increase their stability within the through hole 2. Connecting groups are provided between adjacent hollow slabs 1 to increase the connectivity between them. The equilateral triangle 3 has a vertical reinforcement component on one side to increase its vertical stability within the through hole 2. The inner wall of the through hole 2 is fixedly connected with three first limiting blocks 39 by bolts, and the three first limiting blocks 39 correspond to the three corners of the equilateral triangle 3. The inner wall of the through hole 2 is fixedly connected with three second limiting blocks 40 by bolts, and the three second limiting blocks 40 correspond to the three corners of the inverted triangle 4. The first limiting blocks 39 and the second limiting blocks 40 can limit the equilateral triangle 3 and the inverted triangle 4, and also allow the equilateral triangle 3 and the inverted triangle 4 to slide easily into the through hole 2.

[0057] Reference Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 and attached Figure 7 In this invention, the first transverse reinforcement component includes a third reinforcing bar 8 that is fixedly inserted through the inverted triangular plate 4. A second slider 34 is slidably connected to one side of the inverted triangular plate 4, and the third reinforcing bar 8 passes through the second slider 34. The side of the second slider 34 away from the general reinforcing bar 5 is provided with a second threaded hole 41. A second lead rod 35 that is threadedly connected to the second threaded hole 41 passes through one side of the hollow plate 1. A fixing plate 37 is fixedly connected to one side of the hollow plate 1 by bolts, and the other end of the second lead rod 35 passes through the fixing plate 37. A third nut 36 that is rotatably connected to the fixing plate 37 is threaded on the outer wall of the second lead rod 35. By rotating the third nut 36, the second slider 34 is driven to move outward, so that the second slider 34 tightly pulls the third reinforcing bar 8, thereby increasing the stability of the inverted triangular plate 4 in the through hole 2 through the third reinforcing bar 8.

[0058] Reference Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 and attached Figure 6In this invention, the second transverse reinforcement component includes a first reinforcing bar 6 that is fixedly inserted through the equilateral triangle plate 3. A first slider 10 is slidably connected to one side of the equilateral triangle plate 3, and the first reinforcing bar 6 passes through the first slider 10. The side of the first slider 10 away from the general reinforcing bar 5 is provided with a first threaded hole 11. A first lead screw 12 that is threadedly connected to the first threaded hole 11 passes through one side of the hollow plate 1. A triangular pad 13 is fixedly connected to one side of the hollow plate 1 by bolts, and the other end of the first lead screw 12 passes through the triangular pad 13. A first nut 14 that is rotatably connected to the triangular pad 13 is threaded on the outer wall of the first lead screw 12. The first bevel gear 15 and the first nut 14 are rotated by the second bevel gear 26. This not only allows the cylindrical block 17 to be inserted into the concave ring 16, increasing the stability between two adjacent hollow plates 1, but also allows the first lead screw 12 and the first slider 10 to move in the direction of the second bevel gear 26. By pulling the first reinforcing bar 6, the stability of the equilateral triangle plate 3 in the through hole 2 is increased.

[0059] Reference Appendix Figure 9 and attached Figure 10 In this invention, the connecting assembly includes multiple semi-circular holes 23 disposed on the adjacent sides of two hollow plates 1. A hollow sleeve 24 is slidably fitted within two adjacent semi-circular holes 23. A rotating shaft 25 rotatably passes through the hollow sleeve 24. A second bevel gear 26 is bolted to the bottom end of the rotating shaft 25. A concave ring 16 is bolted to the end of one first lead screw 12 away from the hollow plate 1, and a cylindrical block 17 is bolted to the end of the other first lead screw 12 away from the hollow plate 1. A first bevel gear 15 is fixedly fitted onto the outer wall of each of the two first nuts 14, and the first bevel gear 15 meshes with the second bevel gear 26. Multiple sliding grooves 18 are provided on the inner wall of the concave ring 16. A sliding plate 19 is slidably connected within the sliding grooves 18. Multiple springs 2 are fixedly connected to the side of the sliding plate 19 away from the first lead screw 12. 0, and the other end of the spring 20 is fixedly connected to the inner wall of one side of the slide groove 18. The side of the slide plate 19 away from the spring 20 is fixedly connected with multiple triangular teeth 21 by bolts. The outer wall of the cylindrical block 17 is fixedly connected with multiple racks 22 that cooperate with the triangular teeth 21 by bolts. The outer wall of the hollow sleeve 24 is fixedly fitted with a limiting ring 33. The limiting ring 33 can limit the hollow sleeve 24. By rotating the second bevel gear 26, the first bevel gear 15 and the first nut 14 are driven to rotate, which in turn can drive the corresponding first lead screw 12 to move in the direction of the second bevel gear 26, so that the cylindrical block 17 can be inserted into the concave ring 16, thereby combining the two adjacent hollow plates 1 into a whole, increasing the stability between the two adjacent hollow plates 1, and further increasing the load-bearing capacity and shear resistance of the hollow plate 1.

[0060] Reference Appendix Figure 6 and attached Figure 8In this invention, the vertical reinforcement component includes a U-shaped frame 27 slidably connected to one side of the equilateral triangle plate 3. Two first horizontal plates 28 are fixedly connected to the U-shaped frame 27 by bolts. The top of each of the two first horizontal plates 28 is fixedly connected to an arc plate 29 by bolts. The two arc plates 29 are respectively used to support the second reinforcing bar 7 and the fourth reinforcing bar 9. The top of the hollow plate 1 is provided with multiple countersunk holes 32 that communicate with the through hole 2. The top of the U-shaped frame 27 is fixedly connected to a screw 30 by bolts. The outer wall of the screw 30 is threaded with a second nut 31, and the countersunk holes 32 contact the bottom inner wall of the second nut 31. When the second nut 31 is rotated, the countersunk holes 32 drive the screw 30 and the U-shaped frame 27 to move upward until the two arc plates 29 are tightly fitted with the second reinforcing bar 7 and the fourth reinforcing bar 9, respectively. This increases the vertical stability of the second reinforcing bar 7, the fourth reinforcing bar 9, the equilateral triangle plate 3, and the second reinforcing bar 7 in the through hole 2, thereby increasing the load-bearing capacity and shear resistance of the hollow plate 1.

[0061] Reference Appendix Figure 6 and attached Figure 7 In this invention, multiple connecting steel bars 38 are fixedly connected between adjacent equilateral triangle plates 3 and inverted triangle plates 4 by electric welding. The connecting steel bars 38 can increase the stability between adjacent equilateral triangle plates 3 and inverted triangle plates 4, thereby increasing the longitudinal bearing capacity and shear resistance of the hollow plate 1.

[0062] Example 2:

[0063] Reference Figure 1 — Figure 10 A highly efficient shear strengthening method for prestressed hollow slab beam bridges includes the following steps:

[0064] S1. Weld multiple connecting steel bars 38 between adjacent equilateral triangle 3 and inverted triangle 4. Then, pass multiple general steel bars 5 through equilateral triangle 3 and inverted triangle 4 and weld the general steel bars 5 to equilateral triangle 3 and inverted triangle 4. Pass the first steel bar 6 and the second steel bar 7 through equilateral triangle 3, and the first steel bar 6 passes through the first slider 10. Similarly, pass the third steel bar 8 and the fourth steel bar 9 through inverted triangle 4, and the third steel bar 8 passes through the second slider 34. Then, weld the first steel bar 6 and the second steel bar 7 to equilateral triangle 3, and weld the third steel bar 8 and the fourth steel bar 9 to inverted triangle 4.

[0065] S2. Insert the welded equilateral triangle 3 and inverted triangle 4 into the through hole 2. The three corners of the equilateral triangle 3 correspond to the first limiting block 39, and the three corners of the inverted triangle 4 correspond to the second limiting block 40. The equilateral triangle 3 and inverted triangle 4 can slide along the first limiting block 39 and the second limiting block 40 respectively to extend into the hollow plate 1.

[0066] S3. When the equilateral triangle 3 and the inverted triangle 4 are moved to the corresponding positions, the second lead screw 35 is inserted into the through hole 2 from one side of the hollow plate 1. At this time, one end of the second lead screw 35 can just correspond to the second threaded hole 41 on the second slider 34. Then, rotate the second lead screw 35 to make the second lead screw 35 threadedly connected to the second slider 34. Tighten the second lead screw 35 to make the second lead screw 35 tightly connected to the second slider 34. Then rotate the third nut 36, which is threadedly connected to the second lead screw 35. As the third nut 36 rotates, the third nut 36 pulls the second lead screw 35 and the second slider 34 outward, thereby increasing the stability of the third steel bar 8 and the inverted triangle 4 in the through hole 2.

[0067] S4. Next, insert the first lead screw 12 into the through hole 2 from one side of the hollow plate 1. The first lead screw 12 is threadedly connected to the first threaded hole 11. Rotate the first lead screw 12 to tightly connect the first lead screw 12 with the first slider 10. When multiple hollow plates 1 are hoisted onto the bridge pier, they are arranged side by side. When two hollow plates 1 are arranged side by side, two adjacent semicircular holes 23 form a hole. Insert the hollow sleeve 24 into the semicircular hole 23. The hollow sleeve 24 drives the rotating shaft 25 and the second bevel gear 26 to move downward. At this time, the third nut 36 meshes with the first bevel gear 15. The rotating shaft 25 drives the second bevel gear 26 to rotate. The second bevel gear 26 drives the two adjacent first nuts 14 to rotate through the first bevel gear 15. The first nut 14 is threadedly connected to the first lead screw 12. As the first nut 14 rotates, the first nut 14 drives the first lead screw 12 and the first slider 10 to move towards the second bevel gear 26.

[0068] S5. When the two first lead screws 12 drive the concave ring 16 and the cylindrical block 17 to move toward the second bevel gear 26 respectively, the cylindrical block 17 can just extend into the concave ring 16. The concave ring 16 drives the rack 22 into the concave ring 16. The rack 22 is engaged by the triangular locking teeth 21. In addition to increasing the stability of the first steel bar 6 and the equilateral triangular plate 3 in the through hole 2 through the first lead screw 12, it can also increase the connection between the two adjacent hollow plates 1, and further increase the shear bearing capacity.

[0069] S6. Next, concrete is poured into the through hole 2 through the second nut 31. This concrete can be high-performance concrete (such as the high-performance concrete in the patent with publication number CN112624695B). When the through hole 2 is filled with concrete, the drive motor 44 is started to drive the turntable 45 to rotate. The turntable 45 drives the cylinder 46 to rotate. The cooperation between the cylinder 46 and the sliding groove 43 can drive the screw 30, the U-shaped frame 27 and the mixing plate 47 to move up and down reciprocally, thereby vibrating the concrete in the through hole 2 and making the concrete in the through hole 2 solidify. The soil fills the space inside the through hole 2. Then, the drive motor 44 and the second horizontal plate 42 are removed from the hollow plate 1 and the screw 30. The countersunk hole 32 is fitted onto the screw 30. The countersunk hole 32 is rotated. As the countersunk hole 32 rotates, it drives the screw 30 and the U-shaped frame 27 to move upward until the two arc plates 29 are tightly attached to the second reinforcing bar 7 and the fourth reinforcing bar 9, respectively. This increases the vertical stability of the second reinforcing bar 7, the fourth reinforcing bar 9, the equilateral triangle plate 3, and the second reinforcing bar 7 in the through hole 2, thereby increasing the load-bearing capacity and shear resistance of the hollow plate 1.

[0070] Reference Appendix Figure 1 - Appendix Figure 10 In this invention, multiple hollow slabs 1 are arranged side by side. Each hollow slab 1 has a through hole 2. Multiple equilateral triangles 3 and inverted triangles 4 are arranged alternately within the through hole 2. Multiple general-purpose steel bars 5 are fixedly inserted into each of the equilateral triangles 3 and inverted triangles 4. Two sets of first lateral reinforcement components are provided within the inverted triangles 4 to increase their stability within the through hole 2. Two sets of second lateral reinforcement components are provided within the equilateral triangles 3 to increase their stability within the through hole 2. Connecting groups are provided between adjacent hollow slabs 1 to increase the connectivity between them. The equilateral triangle 3 has a vertical reinforcement component on one side to increase its vertical stability within the through hole 2. The inner wall of the through hole 2 is fixedly connected with three first limiting blocks 39 by bolts, and the three first limiting blocks 39 correspond to the three corners of the equilateral triangle 3. The inner wall of the through hole 2 is fixedly connected with three second limiting blocks 40 by bolts, and the three second limiting blocks 40 correspond to the three corners of the inverted triangle 4. The first limiting blocks 39 and the second limiting blocks 40 can limit the equilateral triangle 3 and the inverted triangle 4, and also allow the equilateral triangle 3 and the inverted triangle 4 to slide easily into the through hole 2.

[0071] Reference Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 and attached Figure 7In this invention, the first transverse reinforcement component includes a third reinforcing bar 8 that is fixedly inserted through the inverted triangular plate 4. A second slider 34 is slidably connected to one side of the inverted triangular plate 4, and the third reinforcing bar 8 passes through the second slider 34. The side of the second slider 34 away from the general reinforcing bar 5 is provided with a second threaded hole 41. A second lead rod 35 that is threadedly connected to the second threaded hole 41 passes through one side of the hollow plate 1. A fixing plate 37 is fixedly connected to one side of the hollow plate 1 by bolts, and the other end of the second lead rod 35 passes through the fixing plate 37. A third nut 36 that is rotatably connected to the fixing plate 37 is threaded on the outer wall of the second lead rod 35. By rotating the third nut 36, the second slider 34 is driven to move outward, so that the second slider 34 tightly pulls the third reinforcing bar 8, thereby increasing the stability of the inverted triangular plate 4 in the through hole 2 through the third reinforcing bar 8.

[0072] Reference Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 and attached Figure 6 In this invention, the second transverse reinforcement component includes a first reinforcing bar 6 that is fixedly inserted through the equilateral triangle plate 3. A first slider 10 is slidably connected to one side of the equilateral triangle plate 3, and the first reinforcing bar 6 passes through the first slider 10. The side of the first slider 10 away from the general reinforcing bar 5 is provided with a first threaded hole 11. A first lead screw 12 that is threadedly connected to the first threaded hole 11 passes through one side of the hollow plate 1. A triangular pad 13 is fixedly connected to one side of the hollow plate 1 by bolts, and the other end of the first lead screw 12 passes through the triangular pad 13. A first nut 14 that is rotatably connected to the triangular pad 13 is threaded on the outer wall of the first lead screw 12. The first bevel gear 15 and the first nut 14 are rotated by the second bevel gear 26. This not only allows the cylindrical block 17 to be inserted into the concave ring 16, increasing the stability between two adjacent hollow plates 1, but also allows the first lead screw 12 and the first slider 10 to move in the direction of the second bevel gear 26. By pulling the first reinforcing bar 6, the stability of the equilateral triangle plate 3 in the through hole 2 is increased.

[0073] Reference Appendix Figure 9 and attached Figure 10In this invention, the connecting assembly includes multiple semi-circular holes 23 disposed on the adjacent sides of two hollow plates 1. A hollow sleeve 24 is slidably fitted within two adjacent semi-circular holes 23. A rotating shaft 25 rotatably passes through the hollow sleeve 24. A second bevel gear 26 is bolted to the bottom end of the rotating shaft 25. A concave ring 16 is bolted to the end of one first lead screw 12 away from the hollow plate 1, and a cylindrical block 17 is bolted to the end of the other first lead screw 12 away from the hollow plate 1. A first bevel gear 15 is fixedly fitted onto the outer wall of each of the two first nuts 14, and the first bevel gear 15 meshes with the second bevel gear 26. Multiple sliding grooves 18 are provided on the inner wall of the concave ring 16. A sliding plate 19 is slidably connected within the sliding grooves 18. Multiple springs 2 are fixedly connected to the side of the sliding plate 19 away from the first lead screw 12. 0, and the other end of the spring 20 is fixedly connected to the inner wall of one side of the slide groove 18. The side of the slide plate 19 away from the spring 20 is fixedly connected with multiple triangular teeth 21 by bolts. The outer wall of the cylindrical block 17 is fixedly connected with multiple racks 22 that cooperate with the triangular teeth 21 by bolts. The outer wall of the hollow sleeve 24 is fixedly fitted with a limiting ring 33. The limiting ring 33 can limit the hollow sleeve 24. By rotating the second bevel gear 26, the first bevel gear 15 and the first nut 14 are driven to rotate, which in turn can drive the corresponding first lead screw 12 to move in the direction of the second bevel gear 26, so that the cylindrical block 17 can be inserted into the concave ring 16, thereby combining the two adjacent hollow plates 1 into a whole, increasing the stability between the two adjacent hollow plates 1, and further increasing the load-bearing capacity and shear resistance of the hollow plate 1.

[0074] Reference Appendix Figure 6 and attached Figure 8 In this invention, the vertical reinforcement component includes a U-shaped frame 27 slidably connected to one side of the equilateral triangle plate 3. Two first horizontal plates 28 are fixedly connected to the U-shaped frame 27 by bolts. The top of each of the two first horizontal plates 28 is fixedly connected to an arc plate 29 by bolts. The two arc plates 29 are respectively used to support the second reinforcing bar 7 and the fourth reinforcing bar 9. The top of the hollow plate 1 is provided with multiple countersunk holes 32 that communicate with the through hole 2. The top of the U-shaped frame 27 is fixedly connected to a screw 30 by bolts. The outer wall of the screw 30 is threaded with a second nut 31, and the countersunk holes 32 contact the bottom inner wall of the second nut 31. When the second nut 31 is rotated, the countersunk holes 32 drive the screw 30 and the U-shaped frame 27 to move upward until the two arc plates 29 are tightly fitted with the second reinforcing bar 7 and the fourth reinforcing bar 9, respectively. This increases the vertical stability of the second reinforcing bar 7, the fourth reinforcing bar 9, the equilateral triangle plate 3, and the second reinforcing bar 7 in the through hole 2, thereby increasing the load-bearing capacity and shear resistance of the hollow plate 1.

[0075] Reference Appendix Figure 6 and attached Figure 7In this invention, multiple connecting steel bars 38 are fixedly connected between adjacent equilateral triangle plates 3 and inverted triangle plates 4 by electric welding. The connecting steel bars 38 can increase the stability between adjacent equilateral triangle plates 3 and inverted triangle plates 4, thereby increasing the longitudinal bearing capacity and shear resistance of the hollow plate 1.

[0076] Reference Appendix Figure 11 In this invention, multiple mixing plates 47 are bolted to both sides of the U-shaped frame 27. A second horizontal plate 42 is bolted to the top of the screw 30. A sliding groove 43 is provided on one side of the second horizontal plate 42. Multiple drive motors 44 are bolted to the top of the hollow plate 1. A turntable 45 is bolted to the output shaft of the drive motor 44. A cylinder 46 is bolted to the side of the turntable 45 that is off-center. The cylinder 46 slides with the sliding groove 43. When the drive motor 44 is started, the turntable 45 is driven to rotate. The turntable 45 drives the cylinder 46 to rotate. The cooperation between the cylinder 46 and the sliding groove 43 can drive the screw 30, the U-shaped frame 27 and the mixing plates 47 to move up and down reciprocally. This can vibrate the concrete in the through hole 2, so that the concrete in the through hole 2 fills the space in the through hole 2, thereby reinforcing the entire hollow plate 1.

[0077] However, as is well known to those skilled in the art, the working principle and wiring method of the drive motor 44 are conventional means or common knowledge in this technical field, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0078] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for efficient shear strengthening of prestressed hollow slab beam bridges, characterized in that, Includes the following steps: S1. Weld multiple connecting steel bars (38) between adjacent equilateral triangles (3) and inverted triangles (4). Then, pass multiple general steel bars (5) through the equilateral triangles (3) and inverted triangles (4) and weld the general steel bars (5) to the equilateral triangles (3) and inverted triangles (4). Pass the first steel bar (6) and the second steel bar (7) through the equilateral triangles (3), and the first steel bar (6) through the first slider (10). Similarly, pass the third steel bar (8) and the fourth steel bar (9) through the inverted triangles (4), and the third steel bar (8) through the second slider (34). Then, weld the first steel bar (6) and the second steel bar (7) to the equilateral triangles (3), and weld the third steel bar (8) and the fourth steel bar (9) to the inverted triangles (4). S2. Insert the welded equilateral triangle (3) and inverted triangle (4) into the through hole (2). The three corners of the equilateral triangle (3) correspond to the first limiting block (39), and the three corners of the inverted triangle (4) correspond to the second limiting block (40). The equilateral triangle (3) and inverted triangle (4) can slide along the first limiting block (39) and the second limiting block (40) to extend into the hollow plate (1). S3. When the equilateral triangle (3) and the inverted triangle (4) are moved to the corresponding positions, the second lead screw (35) is inserted into the through hole (2) from one side of the hollow plate (1). At this time, one end of the second lead screw (35) can just correspond to the second threaded hole (41) on the second slider (34). Then rotate the second lead screw (35) to make the second lead screw (35) and the second slider (34) threadedly connected. Tighten the second lead screw (35) to make the second lead screw (35) and the second slider (34) tightly connected. Then rotate the third nut (36) to make the third nut (36) threadedly connected to the second lead screw (35). As the third nut (36) rotates, the third nut (36) pulls the second lead screw (35) and the second slider (34) outward, thereby increasing the stability of the third steel bar (8) and the inverted triangle (4) in the through hole (2). S4. Next, insert the first lead screw (12) into the through hole (2) from one side of the hollow plate (1). The first lead screw (12) is threadedly connected to the first threaded hole (11). Rotate the first lead screw (12) to tightly connect the first lead screw (12) with the first slider (10). When hoisting multiple hollow plates (1) onto the bridge pier, arrange the multiple hollow plates (1) side by side. When two hollow plates (1) are arranged side by side, the two adjacent semicircular holes (23) form a hole. Insert the hollow sleeve (24) into the semicircular hole (23). The rotating shaft (25) and the second bevel gear (26) are driven to move downwards. At this time, the third nut (36) meshes with the first bevel gear (15) and drives the second bevel gear (26) to rotate through the rotating shaft (25). The second bevel gear (26) drives the two adjacent first nuts (14) to rotate through the first bevel gear (15). The first nuts (14) are threadedly connected to the first lead screw (12). As the first nuts (14) rotate, the first nuts (14) drive the first lead screw (12) and the first slider (10) to move in the direction of the second bevel gear (26). S5. When the two first screws (12) drive the concave ring (16) and the cylindrical block (17) to move toward the second bevel gear (26) respectively, the cylindrical block (17) can just extend into the concave ring (16). The concave ring (16) drives the rack (22) into the concave ring (16). The rack (22) is engaged by the triangular tooth (21). In addition to increasing the stability of the first steel bar (6) and the equilateral triangle plate (3) in the through hole (2) through the first screw (12), it can also increase the connection between the two adjacent hollow plates (1) and further increase the shear bearing capacity. S6. Next, concrete is poured into the through hole (2) through the second nut (31). When the concrete fills the through hole (2), the drive motor (44) is started to drive the turntable (45) to rotate. The turntable (45) drives the cylinder (46) to rotate. The cooperation between the cylinder (46) and the sliding groove (43) can drive the screw (30), U-shaped frame (27) and mixing plate (47) to move up and down, thereby vibrating the concrete in the through hole (2) so that the concrete in the through hole (2) fills the space in the through hole (2). Then, the drive motor (44) and the second nut (31) are started to fill the space in the through hole (2). The horizontal plate (42) is removed from the hollow plate (1) and the screw (30). The countersunk hole (32) is fitted onto the screw (30). The countersunk hole (32) is rotated. As the countersunk hole (32) rotates, it drives the screw (30) and the U-shaped frame (27) to move upward until the two arc plates (29) are tightly attached to the second reinforcing bar (7) and the fourth reinforcing bar (9) respectively. This increases the vertical stability of the second reinforcing bar (7), the fourth reinforcing bar (9), the equilateral triangle plate (3), and the second reinforcing bar (7) in the through hole (2), thereby increasing the load-bearing capacity and shear resistance of the hollow plate (1).

2. The method for efficient shear strengthening of prestressed hollow slab beam bridges according to claim 1, comprising multiple hollow slabs (1) arranged side by side, characterized in that, The hollow plate (1) has a through hole (2), and the through hole (2) has multiple equilateral triangles (3) and inverted triangles (4), and the equilateral triangles (3) and inverted triangles (4) are arranged alternately. Multiple general-purpose steel bars (5) are fixedly inserted in the multiple equilateral triangles (3) and inverted triangles (4). The inverted triangle plate (4) is provided with two sets of first lateral reinforcement components to increase the stability of the inverted triangle plate (4) in the through hole (2); The equilateral triangle plate (3) is provided with two sets of second lateral reinforcement components to increase the stability of the equilateral triangle plate (3) in the through hole (2); A connecting component is provided between two adjacent hollow plates (1) to increase the connectivity between the two adjacent hollow plates (1); The equilateral triangle (3) is provided with a vertical reinforcement component on one side to increase the vertical stability of the equilateral triangle (3) in the through hole (2).

3. The method for efficient shear strengthening of prestressed hollow slab beam bridges according to claim 2, characterized in that, The first transverse reinforcement component includes a third steel bar (8) that is fixedly inserted through the inverted triangular plate (4). A second slider (34) is slidably connected to one side of the inverted triangular plate (4), and the third steel bar (8) passes through the second slider (34). The second slider (34) is provided with a second threaded hole (41) on the side away from the general steel bar (5). A second threaded rod (35) that is threadedly connected to the second threaded hole (41) passes through one side of the hollow plate (1). A fixing plate (37) is fixedly connected to one side of the hollow plate (1), and the other end of the second threaded rod (35) passes through the fixing plate (37). A third nut (36) that is rotatably connected to the fixing plate (37) is threaded on the outer wall of the second threaded rod (35).

4. The efficient shear strengthening method for prestressed hollow slab beam bridges according to claim 1, characterized in that, The second transverse reinforcement component includes a first steel bar (6) fixedly penetrating the equilateral triangle plate (3), a first slider (10) slidably connected to one side of the equilateral triangle plate (3), and the first steel bar (6) penetrating the first slider (10). The first slider (10) is provided with a first threaded hole (11) on the side away from the general steel bar (5). A first lead screw (12) threadedly connected to the first threaded hole (11) is passed through one side of the hollow plate (1). A triangular pad (13) is fixedly connected to one side of the hollow plate (1), and the other end of the first lead screw (12) passes through the triangular pad (13). A first nut (14) rotatably connected to the triangular pad (13) is threaded on the outer wall of the first lead screw (12).

5. The efficient shear strengthening method for prestressed hollow slab beam bridges according to claim 1, characterized in that, The connecting assembly includes multiple semicircular holes (23) disposed on one side of two hollow plates (1) close to each other. A hollow sleeve (24) is slidably fitted in two adjacent semicircular holes (23). A rotating shaft (25) rotatably passes through the hollow sleeve (24). A second bevel gear (26) is fixedly connected to the bottom end of the rotating shaft (25). A concave ring (16) is fixedly connected to the end of one first lead screw (12) away from the hollow plate (1), and a cylindrical block (17) is fixedly connected to the end of the other first lead screw (12) away from the hollow plate (1). The outer walls of the two first nuts (14) are fixedly fitted with first bevel gears. 15), and the first bevel gear (15) meshes with the second bevel gear (26). The inner wall of the concave ring (16) is provided with a plurality of sliding grooves (18). A sliding plate (19) is slidably connected in the sliding groove (18). A plurality of springs (20) are fixedly connected to the side of the sliding plate (19) away from the first lead screw (12). The other end of the spring (20) is fixedly connected to the inner wall of one side of the sliding groove (18). A plurality of triangular teeth (21) are fixedly connected to the side of the sliding plate (19) away from the spring (20). A plurality of racks (22) that cooperate with the triangular teeth (21) are fixedly connected to the outer wall of the cylindrical block (17).

6. The efficient shear strengthening method for prestressed hollow slab beam bridges according to claim 1, characterized in that, The vertical reinforcement component includes a U-shaped frame (27) slidably connected to one side of the equilateral triangle plate (3). Two first horizontal plates (28) are fixedly connected inside the U-shaped frame (27). The top of each of the two first horizontal plates (28) is fixedly connected to an arc plate (29), and the two arc plates (29) are respectively used to support the second reinforcing bar (7) and the fourth reinforcing bar (9). The top of the hollow plate (1) is provided with multiple countersunk holes (32) that communicate with the through hole (2). The top of the U-shaped frame (27) is fixedly connected to a screw (30). The outer wall of the screw (30) is threaded with a second nut (31), and the countersunk hole (32) contacts the bottom inner wall of the second nut (31).

7. The efficient shear strengthening method for prestressed hollow slab beam bridges according to claim 1, characterized in that, The inner wall of the through hole (2) is fixedly connected with three first limiting blocks (39), and the three first limiting blocks (39) correspond to the three corners of the equilateral triangle (3) respectively. The inner wall of the through hole (2) is fixedly connected with three second limiting blocks (40), and the three second limiting blocks (40) correspond to the three corners of the inverted triangle (4) respectively.

8. The efficient shear strengthening method for prestressed hollow slab beam bridges according to claim 1, characterized in that, Multiple connecting steel bars (38) are fixedly connected between adjacent equilateral triangles (3) and inverted triangles (4). The connecting steel bars (38) can increase the stability between adjacent equilateral triangles (3) and inverted triangles (4), thereby increasing the longitudinal bearing capacity and shear resistance of the hollow slab (1).

9. A method for efficient shear strengthening of prestressed hollow slab beam bridges according to claim 5, characterized in that, A limiting ring (33) is fixedly fitted on the outer wall of the hollow sleeve (24).

10. The method for efficient shear strengthening of prestressed hollow slab beam bridges according to claim 1, characterized in that, Multiple stirring plates (47) are fixedly connected to both sides of the U-shaped frame (27). A second horizontal plate (42) is fixedly connected to the top of the screw (30). A sliding groove (43) is provided on one side of the second horizontal plate (42). Multiple drive motors (44) are fixedly connected to the top of the hollow plate (1). A turntable (45) is fixedly connected to the output shaft of the drive motor (44). A cylinder (46) is fixedly connected to the side of the turntable (45) that is off-center, and the cylinder (46) slides in cooperation with the sliding groove (43).

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