Bridge reinforcing method based on FRP bars and geopolymer concrete plates

Abstract

The invention discloses a bridge reinforcing method based on FRP ribs and geopolymer concrete plates, and belongs to the technical field of bridge reinforcing. Comprising the following steps that S1, a plate manufacturing device is designed to meet the requirement for manufacturing the FRP rib reinforced geopolymer plate; s2, FRP ribs are laid in a plate manufacturing device, and the height of the FRP ribs and the distance between every two adjacent FRP ribs are adjusted through the plate manufacturing device; s3, tensioning operation is conducted on the FRP bars through the plate manufacturing device, and prestress is applied to the FRP bars; s4, a pouring formwork is installed on the outer side of the FRP rib, geopolymer mortar is poured into the pouring formwork, and maintenance is conducted; and S5, after maintenance is completed, the plate manufacturing device is operated, the prestress applied to the FRP ribs is released, and demolding is conducted. According to the technical scheme, the bridge reinforcing mode in the prior art is simplified, and meanwhile the bridge reinforcing effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge reinforcement, and in particular relates to a bridge reinforcement method based on FRP bars and geopolymer concrete plates. Background Art

[0002] Reinforced concrete bridges usually have insufficient use functions and ultimate bearing capacity due to the following reasons: first, inherent design defects; second, increase in use load; third, reduced bearing capacity due to structural damage caused by collision and corrosion. In order to maintain the normal use of these functionally degraded bridge structures, such bridge structures need to be reinforced to improve their performance.

[0003] In recent years, FRP (Fiber Reinforced Plastics) materials have been widely used in the field of concrete structure and other structural reinforcement due to their corrosion resistance, light weight, high strength, and convenient construction. At present, the research on FRP reinforced reinforced concrete bridges mainly focuses on the reinforcement technology of external FRP sheets.

[0004] However, in actual use, the FRP sheet itself is not resistant to high temperature, aging, humidity and heat. Therefore, when it is used on a bridge exposed to the air, the performance of the FRP sheet may be affected due to exposure to the sun or long-term rain, resulting in the problem that the bridge reinforcement effect is affected. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a bridge reinforcement method based on FRP bars and geopolymer concrete slabs, so as to improve the reinforcement effect of the bridge.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a bridge reinforcement method based on FRP bars and geopolymer concrete plates, comprising the following steps:

[0008] S1. Design a plate production device to meet the requirements for producing FRP bar reinforced geopolymer plates;

[0009] S2, laying the FRP bars inside the plate making device, and adjusting the height of the FRP bars and the spacing between adjacent FRP bars through the plate making device;

[0010] S3, performing tensioning operation on a plurality of FRPs by means of a plate manufacturing device, and applying prestress to a plurality of FRP bars;

[0011] S4. Install a casting formwork on the outside of the FRP reinforcement, pour geopolymer mortar into the casting formwork, and perform curing;

[0012] S5. After the curing is completed, the plate making device is operated to release the prestress applied to the FRP bars, and the FRP bars on the outer side of the FRP bar reinforced geopolymer plate after the curing is completed are cut off and demoulding is performed;

[0013] S6. Fix the manufactured FRP bar reinforced geopolymer plates on the side and bottom of the bridge deck to respectively improve the shear and bending resistance of the bridge deck, thereby achieving the reinforcement operation of the bridge.

[0014] Furthermore, the specific structure of the plate making device mentioned in step S1 is:

[0015] The invention comprises two I-beams which are symmetrically arranged, and an end limit assembly is provided on one end of the two I-beams. The end limit assembly comprises a fixing block, and the fixing block is provided with an adjusting bolt, and the adjusting bolt is threadedly connected to the fixing block. The two adjusting bolts are provided with a vertical stopper with a through groove in the middle, and the two ends of the vertical stopper are rotatably connected to the two adjusting bolts respectively. An end limit assembly is also provided on the other end of the two I-beams, and a mounting plate is provided below the end limit assembly, and the mounting plate is fixed to the end of the other end of the I-beam. A hollow reaction frame is provided on the mounting plate, and one end of the reaction frame is fixed to the mounting plate. A sliding block is provided between the reaction frame and the end of the I-beam, and the end limit assembly is provided with a plurality of sliding blocks. The fixing block is fixed on the slider, the upper end of the slider is provided with a threaded seat, the threaded seat is fixed on the slider, a first screw is provided in the threaded seat, one end of the first screw is threadedly connected to the threaded seat, the other end of the first screw passes through the reaction frame, and a through-type hydraulic jack is provided on this end of the first screw, one end of the through-type hydraulic jack is fixed to the reaction frame, two locking nuts are provided on the first screw, one locking nut is arranged on the first screw located inside the reaction frame, and the other locking nut is arranged on the screw outside the other end of the through-type hydraulic jack, single-hole anchor cups are provided on both ends of the FRP tendon, and the single-hole anchor cups are respectively abutted on the outer sides of the vertical blocks in the two groups of end limit assemblies.

[0016] Furthermore, the mounting plate is provided with a T-shaped slide rail, the sliding block is provided with a T-shaped slide groove, and the T-shaped slide groove is slidably sleeved on the T-shaped slide rail.

[0017] Furthermore, two groups of end limit assemblies are provided with a variable pitch assembly on the side facing the middle of the wage steel, and the variable pitch assembly includes a transverse block with a through groove in the middle, and two ends of the transverse block are fixed on the inner side surfaces of the two I-beams, and a plurality of groups of clamping block assemblies are provided inside the through groove of the transverse block, and the clamping block assemblies are used to clamp the FRP tendons, and a first spring is provided between adjacent clamping block assemblies, and the two ends of the first spring are respectively fixed on the outer side surfaces of the clamping block assemblies, and a second screw is provided at the lower part of the transverse block, and the ends of several clamping block assemblies are slidably sleeved on the second screw, and the outer sides of the two ends of several clamping block assemblies are respectively provided with a first nut slider and a second nut slider, and the first nut slider and the second nut slider are threadedly connected to the second screw, and when the second screw rotates, the movement directions of the first nut slider and the second nut slider on the second screw are opposite, and a connecting block is provided on the two I-beams, and one end of the connecting block is fixed on the I-beam, and the two ends of the second screw are respectively rotatably connected to the two connecting blocks.

[0018] Furthermore, a hexagonal prism is provided at one end of the second screw rod, one end of the hexagonal prism is fixed to the end of the second screw rod, a light rod is symmetrically provided between the two connecting blocks, both ends of the light rod are respectively fixed to the two connecting blocks, and both ends of the first nut slider and the second nut slider are respectively slidably connected to the light rod.

[0019] Furthermore, the clamping block assembly includes a first clamping plate and a second clamping plate, a second spring is provided between the first clamping plate and the second clamping plate, and two ends of the second spring are respectively fixed to the inner side surfaces of the first clamping plate and the second clamping plate.

[0020] Furthermore, a first limit block and a second limit block are respectively provided at the lower part of the inner side surfaces of the first splint and the second splint, one end of the first limit block is fixed to the first splint, and the other end of the first limit block is slidably connected to the second splint, one end of the second limit block is fixed to the second splint, and the other end of the second limit block is slidably connected to the first splint.

[0021] Furthermore, the casting template includes a base plate, a symmetrically arranged length direction template and a symmetrically arranged width direction template, the base plate is fixed on the lower surface of the I-beam, the length direction template is connected to the I-beam through a telescopic element, and the bottom surface of the length direction template is in sliding contact with the base plate, and the width direction template is detachably connected to a number of arranged FRP ribs.

[0022] The beneficial effects of the present invention are:

[0023] (1) In this technical solution, FRP bars and geopolymer concrete are combined to form a plate to reinforce the bridge. Compared with FRP sheets, the plate made in this technical solution has improved performance in corrosion resistance, high temperature resistance, durability and fire resistance. Therefore, it can be used to reinforce the bridge, which can improve the reinforcement effect of the bridge;

[0024] (2) In the present technical solution, when manufacturing FRP bar reinforced geopolymer panels, the distribution spacing and distribution height of the FRP bars inside the panels can be adjusted so that the FRP bars are in the optimal position inside the FRP bar reinforced geopolymer panels, thereby improving the casting and molding effects of the FRP bar reinforced geopolymer panels, thereby enhancing the bearing capacity and improving the reinforcement effect of the bridge.

[0025] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0027] Figure 1 It is a three-dimensional schematic diagram of the plate manufacturing device in the present invention;

[0028] Figure 2 It is a three-dimensional schematic diagram of another viewing angle of the plate making device of the present invention;

[0029] Figure 3 It is a three-dimensional schematic diagram of the end limit assembly and the clamping block assembly in the plate manufacturing device of the present invention;

[0030] Figure 4 It is a schematic diagram of an exploded view of a clamping block assembly in a plate making device of the present invention;

[0031] Figure 5 It is a three-dimensional schematic diagram of the end limit assembly in the plate manufacturing device of the present invention;

[0032] Figure 6 The present invention is a schematic front view of an end limit assembly and a clamping block assembly in a plate manufacturing device.

[0033] The following are marked in the accompanying drawings:

[0034] 1. I-beam; 2. Casting formwork; 3. Vertical block; 4. Fixed block; 5. Through slot; 6. Adjusting bolt; 7. Single-hole anchor cup; 8. Horizontal block; 9. First clamp; 10. Second clamp; 11. First limit block; 12. Second limit block; 13. First spring; 14. Second spring; 15. Second screw; 16. First nut slider; 17. Second nut slider; 18. Bar; 19. Connecting block; 20. Hexagonal prism; 21. Mounting plate; 22. T-type slide rail; 23. Slider; 24. Threaded seat; 25. Load sensor; 26. Reaction frame; 27. Through-type hydraulic jack; 28. First locking nut; 29. ​​Second locking nut; 30. FRP reinforcement. DETAILED DESCRIPTION

[0035] like Figure 1 to Figure 6 As shown, the present invention provides a bridge reinforcement method based on FRP bars and geopolymer concrete plates, comprising the following steps:

[0036] S1. Design a plate production device to meet the requirements for producing FRP rib 30 reinforced geopolymer plates;

[0037] S2, laying the FRP ribs 30 inside the plate making device, and adjusting the height of the FRP ribs 30 and the spacing between adjacent FRP ribs 30 by the plate making device;

[0038] S3, performing tensioning operation on a plurality of FRPs by means of a plate manufacturing device, and applying prestress to a plurality of FRP bars 30;

[0039] S4, installing a casting template 2 on the outside of the FRP reinforcement 30, pouring geopolymer mortar into the casting template 2, and performing curing;

[0040] S5, after the curing is completed, the plate making device is operated to release the prestress applied to the FRP ribs 30, and the FRP ribs 30 on the outer side of the FRP ribs 30 reinforced geopolymer plate after the curing is completed are cut off, and demoulding is performed;

[0041] S6. The prepared FRP bar 30 reinforced geopolymer plate is fixed to the side and bottom surfaces of the bridge deck to respectively improve the shear and bending resistance of the bridge deck, thereby achieving the reinforcement operation of the bridge.

[0042] In one practicable manner, the specific structure of the plate making device mentioned in step S1 is:

[0043] The invention comprises two symmetrically arranged I-beams 1, the bottom surfaces of the two I-beams 1 are provided with supporting feet, and are fixed to the bottom surfaces for connection by a plurality of cross beams, an end limit assembly is provided on one end of the two I-beams 1, and the end limit assembly comprises a fixing block 4, each fixing block 4 is provided with an adjusting bolt 6, and the adjusting bolt 6 is threadedly connected to the fixing block 4, and the two adjusting bolts 6 are provided with a vertical stopper 3 with a through slot 5 in the middle, and the through slot 5 can be a rectangular slot, and the two ends of the vertical stopper 3 are respectively rotatably connected to the two adjusting bolts 6, and the rotatable connection can be realized by a bearing, and an end limit assembly is also provided on the other end of the two I-beams 1, and a mounting plate 21 is provided below the end limit assembly, and the mounting plate 21 is fixed to the end of the other end of the I-beam 1, and a hollow reaction frame 26 is provided on the mounting plate 21, and one end of the reaction frame 26 is fixed to the mounting plate 21, and a Slider 23, the fixed block 4 in the end limit assembly is fixed on the slider 23, the upper end of the slider 23 is provided with a threaded seat 24, the threaded seat 24 is fixed on the slider 23, a first screw is provided in the threaded seat 24, one end of the first screw is threadedly connected to the threaded seat 24, the other end of the first screw passes through the reaction frame 26, and a through-type hydraulic jack 27 is provided on this end of the first screw, one end of the through-type hydraulic jack 27 is fixed to the reaction frame 26, two locking nuts are provided on the first screw, which can be divided into a first locking nut 28 and a second locking nut 29, the first locking nut 28 is arranged on the first screw located inside the reaction frame 26, and the second locking nut 29 is arranged on the screw on the outside of the other end of the through-type hydraulic jack 27, and single-hole anchor cups 7 are provided on both ends of the FRP rib 30, and the single-hole anchor cups 7 are respectively abutted on the outer sides of the vertical blocks 3 in the two groups of end limit assemblies.

[0044] The working principle of the above technical solution is:

[0045] First, the two ends of the FRP bars 30 to be used are passed through the through grooves 5 of the vertical blocks 3 of the two end limit assemblies, and then single-hole anchor cups 7 are installed at both ends of the FRP bars 30. Then, the FRP bars 30 are slid on the vertical blocks 3 to be at the required distribution spacing. By rotating the adjustment bolts 6, the FRP bars 30 are at a suitable height, which is determined according to the thickness of the required FRP bar 30 reinforced geopolymer board. The FRP bars 30 are in the middle position. Then, the first screw is pulled by the through-type hydraulic jack 27, so that the first screw pulls the slider 23 to move, thereby driving the end limit assembly on the end to move. Since the end limit assembly at the other end is fixed to the end of the I-beam 1, the FRP bars 30 will be pulled, and prestress can be applied to them. When the distribution and prestress of the FRP bars 30 meet the requirements, a casting template is set up around the FRP bars 30 according to the size of the FRP bar 30 reinforced geopolymer board, and finally casting and curing are carried out. It is not difficult to understand that a load sensor 25 and other components should also be provided on the first screw rod to monitor the magnitude of the applied prestress.

[0046] The above-mentioned FRP bar 30 reinforced geopolymer board can be made by adjusting the distribution spacing and distribution height of the FRP bar 30 inside it, so that the FRP bar 30 is in the optimal position inside the FRP bar 30 reinforced geopolymer board, thereby improving the casting and molding effect of the FRP bar 30 reinforced geopolymer board, thereby enhancing the bearing capacity and improving the reinforcement effect of the bridge.

[0047] In one practicable manner, a T-shaped slide rail 22 is provided on the mounting plate 21, and a T-shaped slide groove is provided on the slider 23, and the T-shaped slide groove is slidably sleeved on the T-shaped slide rail 22. This sliding connection method prevents the slider 23 from moving up and down, and can only move on the specified T-shaped slide rail 22, thereby improving the safety and effect of applying prestress to the FRP rib 30.

[0048] In an practicable manner, the two groups of end limit assemblies are provided with a variable pitch assembly on one side facing the middle of the wage steel, and the variable pitch assembly includes a transverse block 8 with a through slot 5 in the middle, and the two ends of the transverse block 8 are fixed on the inner side surfaces of the two I-beams 1. A plurality of groups of clamp block assemblies are provided inside the through slot 5 of the transverse block 8, and the clamp block assemblies are used to clamp the FRP ribs 30. A first spring 13 is provided between adjacent clamp block assemblies, and the two ends of the first spring 13 are respectively fixed on the outer side surfaces of the clamp block assemblies. A second screw 15 is provided at the lower part of the transverse block 8, and the ends of the plurality of clamp block assemblies are slidably sleeved. On the second screw rod 15, the outer sides of both ends of the plurality of clamp block assemblies are respectively provided with a first nut slider 16 and a second nut slider 17, the first nut slider 16 and the second nut slider 17 are threadedly connected to the second screw rod 15, when the second screw rod 15 rotates, the first nut slider 16 and the second nut slider 17 move in opposite directions on the second screw rod 15 (the setting method is the prior art and will not be described in detail here), a connecting block 19 is provided on the two I-beams 1, one end of the connecting block 19 is fixed on the I-beam 1, and the two ends of the second screw rod 15 are respectively rotatably connected to the two connecting blocks 19.

[0049] The working principle of the above technical solution is:

[0050] According to the number of FRP bars 30 used, the positions of placing them in several clamping block assemblies (placed on the middle clamping block assembly) are determined, and then when the spacing needs to be adjusted, it is only necessary to rotate the second screw rod 15, and the several accelerating assemblies can be squeezed toward the middle of the second screw rod 15 through the reverse movement of the first nut slider 16 and the second nut slider 17. During the squeezing process, due to the setting of the first spring 13, the first spring 13 is forced to transmit force, and then the forces on the several first springs 13 are the same, that is, the compression distances of the several first springs 13 are the same, so the spacings between the various clamping block assemblies are consistent, thereby ensuring the consistency of the spacings between the several FRP bars 30, so that the spacings of the FRP bars 30 can be quickly adjusted.

[0051] In one feasible manner, a hexagonal prism 20 is provided at one end of the second screw 15 to facilitate the operator to rotate the second screw 15 through a tool. One end of the hexagonal prism 20 is fixed to the end of the second screw 15. A light rod 18 is symmetrically provided between the two connecting blocks 19. The two ends of the light rod 18 are respectively fixed to the two connecting blocks 19. The two ends of the first nut slider 16 and the second nut slider 17 are respectively slidably connected to the light rod 18. The provision of the light rod 18 can improve the stability of the first nut slider 16 and the second nut slider 17 when moving. Of course, the end of the clamping block assembly can be slidably connected to the light rod 18 to avoid the problem of interference caused by the sliding of the clamping block assembly on the second screw 15 due to the thread provided on the second screw 15.

[0052] In an operative manner, the clamping block assembly includes a first clamping plate 9 and a second clamping plate 10, a second spring 14 is provided between the first clamping plate 9 and the second clamping plate 10, and both ends of the second spring 14 are respectively fixed on the inner side surfaces of the first clamping plate 9 and the second clamping plate 10. The arrangement of the first clamping plate 9 and the second clamping plate 10 enables the FRP rib 30 to be placed therebetween for clamping. At the same time, due to the arrangement of the second spring 14, after the FRP rib 30 is placed, the second spring 14 is stretched, thereby tightly clamping the FRP rib 30. This arrangement enables the clamping block assembly to be applicable to FRP ribs 30 of different sizes. At the same time, since the diameters of the through grooves 5 provided on the vertical block 3 and the horizontal block 8 are both larger than the FRP rib 30, after the height is adjusted, the FRP rib 30 is located on the bottom surface of the through grooves 5. During pouring or due to vibration during pouring, the FRP rib 30 moves upward, resulting in a problem in which the pouring height of the FRP rib 30 changes. It is easy to understand that the compression of the first spring 13 can also squeeze the first clamping plate 9 and the second clamping plate 10 to a certain extent, so that the clamping effect of the second spring can make the FRP rib 30 more stably clamped.

[0053] In an operative manner, the first clamping plate 9 and the second clamping plate 10 are provided with a first stopper 11 and a second stopper 12 at the lower inner side surfaces thereof, one end of the first stopper 11 is fixed to the first clamping plate 9, and the other end of the first stopper 11 is slidably connected to the second clamping plate 10, one end of the second stopper 12 is fixed to the second clamping plate 10, and the other end of the second stopper 12 is slidably connected to the first clamping plate 9. The provision of the first stopper 11 and the second stopper 12 guides the relative movement between the first clamping plate 9 and the second clamping plate 10, thereby improving the movement stability of the two.

[0054] In one feasible manner, the casting template 2 includes a base plate, a symmetrically arranged length direction template and a symmetrically arranged width direction template. The base plate is fixed on the lower surface of the I-beam 1, the length direction template is connected to the I-beam 1 through a telescopic element (linear push rod), and the bottom surface of the length direction template is in sliding contact with the base plate, and the width direction template is detachably connected to a plurality of arranged FRP bars 30. The length direction template can realize the variation of the spacing, thereby realizing the casting of FRP bars 30 reinforced polymer panels of different widths. The width direction template can be prefabricated in multiple groups due to the variation of the height and distribution spacing of the FRP bars 30, which is convenient for selection during casting and will not be elaborated in detail here.

[0055] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A bridge reinforcement method based on FRP bars and geopolymer concrete slabs, characterized in that: The steps include: S1, designing a plate manufacturing device to meet the requirements for manufacturing FRP rib (30) reinforced geopolymer plates; S2, laying the FRP ribs (30) inside the plate manufacturing device, and adjusting the height of the FRP ribs (30) and the spacing between adjacent FRP ribs (30) through the plate manufacturing device; S3, performing a tensioning operation on a plurality of FRP bars by means of a plate manufacturing device, and applying prestress to a plurality of FRP bars (30); S4, installing a casting template (2) on the outside of the FRP reinforcement (30), pouring geopolymer mortar into the casting template (2), and performing curing; S5, after the curing is completed, the plate making device is operated to release the prestress applied to the FRP ribs (30), and the FRP ribs (30) on the outer side of the FRP ribs (30) reinforced geopolymer plate after the curing is completed are cut off, and demoulding is performed; S6. The prepared FRP bars (30) reinforced geopolymer plates are fixed to the side and bottom surfaces of the bridge deck, respectively to improve the shear and bending resistance of the bridge deck, thereby achieving a reinforcement operation on the bridge.

2. A bridge reinforcement method based on FRP bars and geopolymer concrete slabs according to claim 1, characterized in that: The specific structure of the plate making device mentioned in step S1 is: The invention comprises two symmetrically arranged I-beams (1), one end of each of the two I-beams (1) being provided with an end stop assembly, the end stop assembly comprising a fixed block (4), each of the fixed blocks (4) being provided with an adjusting bolt (6), the adjusting bolt (6) being threadedly connected to the fixed block (4), the two adjusting bolts (6) being provided with a vertical stop block (3) having a through slot (5) in the middle, the two ends of the vertical stop block (3) being rotatably connected to the two adjusting bolts respectively. (6), the other ends of the two I-beams (1) are also provided with end stop assemblies, a mounting plate (21) is provided below the end stop assemblies, the mounting plate (21) is fixed to the end of the other end of the I-beam (1), a hollow reaction frame (26) is provided on the mounting plate (21), one end of the reaction frame (26) is fixed to the mounting plate (21), a slider (23) is provided between the reaction frame (26) and the end of the I-beam (1), and the end The fixed block (4) in the limit assembly is fixed on the slider (23), the upper end of the slider (23) is provided with a threaded seat (24), the threaded seat (24) is fixed on the slider (23), a first screw is provided in the threaded seat (24), one end of the first screw is threadedly connected to the threaded seat (24), the other end of the first screw passes through the reaction frame (26), and a through-type hydraulic jack (27) is provided on the end of the first screw, the through-type hydraulic jack One end of the FRP rib (27) is fixed to the reaction frame (26), two locking nuts are arranged on the first screw rod, one locking nut is arranged on the first screw rod located inside the reaction frame (26), and the other locking nut is arranged on the screw rod outside the other end of the through-type hydraulic jack (27), and single-hole anchor cups (7) are arranged on both ends of the FRP rib (30), and the single-hole anchor cups (7) are respectively arranged to abut against the outer sides of the vertical stoppers (3) in the two groups of end limit assemblies.

3. A bridge reinforcement method based on FRP bars and geopolymer concrete slabs according to claim 2, characterized in that: The mounting plate (21) is provided with a T-shaped slide rail (22), the sliding block (23) is provided with a T-shaped slide groove, and the T-shaped slide groove is slidably sleeved on the T-shaped slide rail (22).

4. A bridge reinforcement method based on FRP bars and geopolymer concrete slabs according to claim 2, characterized in that: The two groups of end limit assemblies are provided with a variable pitch assembly on one side facing the middle of the I-beam, and the variable pitch assembly includes a transverse block (8) with a through slot (5) in the middle, and the two ends of the transverse block (8) are fixed on the inner side surfaces of the two I-beams (1). A plurality of clamp block assemblies are provided inside the through slot (5) of the transverse block (8), and the clamp block assemblies are used to clamp the FRP rib (30). A first spring (13) is provided between adjacent clamp block assemblies, and the two ends of the first spring (13) are respectively fixed on the outer side surfaces of the clamp block assemblies. A second screw (15) is provided at the lower part of the transverse block (8), and the ends of the plurality of clamp block assemblies are slidably sleeved. The clamp block assemblies are arranged on the second screw rod (15), and the outer sides of the two ends of the plurality of clamp block assemblies are respectively provided with a first nut slider (16) and a second nut slider (17), and the first nut slider (16) and the second nut slider (17) are threadedly connected to the second screw rod (15). When the second screw rod (15) rotates, the first nut slider (16) and the second nut slider (17) move in opposite directions on the second screw rod (15). The two I-beams (1) are provided with a connecting block (19), and one end of the connecting block (19) is fixed on the I-beam (1). The two ends of the second screw rod (15) are respectively rotatably connected to the two connecting blocks (19).

5. A bridge reinforcement method based on FRP bars and geopolymer concrete slabs according to claim 4, characterized in that: A hexagonal prism (20) is provided at one end of the second screw rod (15), and one end of the hexagonal prism (20) is fixed to the end of the second screw rod (15). A light rod (18) is symmetrically provided between the two connecting blocks (19), and the two ends of the light rod (18) are respectively fixed to the two connecting blocks (19), and the two ends of the first nut slider (16) and the second nut slider (17) are respectively slidably connected to the light rod (18).

6. A bridge reinforcement method based on FRP bars and geopolymer concrete slabs according to claim 4, characterized in that: The clamp block assembly comprises a first clamp plate (9) and a second clamp plate (10), a second spring (14) is provided between the first clamp plate (9) and the second clamp plate (10), and two ends of the second spring (14) are respectively fixed on the inner side surfaces of the first clamp plate (9) and the second clamp plate (10).

7. A bridge reinforcement method based on FRP bars and geopolymer concrete slabs according to claim 6, characterized in that: A first limit block (11) and a second limit block (12) are respectively provided at the lower parts of the inner sides of the first clamping plate (9) and the second clamping plate (10), one end of the first limit block (11) is fixed to the first clamping plate (9), and the other end of the first limit block (11) is slidably connected to the second clamping plate (10), one end of the second limit block (12) is fixed to the second clamping plate (10), and the other end of the second limit block (12) is slidably connected to the first clamping plate (9).

8. The bridge reinforcement method based on FRP bars and geopolymer concrete slabs according to claim 1, characterized in that: The casting template (2) comprises a base plate, a symmetrically arranged length direction template and a symmetrically arranged width direction template, wherein the base plate is fixed to the lower surface of the I-beam (1), the length direction template is connected to the I-beam (1) via a telescopic element, and the bottom surface of the length direction template is in sliding contact with the base plate, and the width direction template is detachably connected to a plurality of arranged FRP ribs (30).

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