Rapid maintenance assembly and method for bridge expansion joint

Abstract

The invention relates to a rapid maintenance assembly and method for a bridge expansion joint. The method comprises the following steps that S1, a comb-shaped toothed plate, a waterproof layer and an anti-corrosion layer are manufactured according to the size of the bridge expansion joint; s2, manufacturing a concrete member; s3, manufacturing the quick-hardening UHPC; s4, the comb-shaped toothed plate, the waterproof layer, the anti-corrosion layer and the concrete member are fixed together to form a bridge expansion joint rapid maintenance assembly; and S5, the bridge expansion joint rapid maintenance assembly is placed on the bridge expansion joint, pouring is conducted through rapid hardening UHPC, and fixing of the bridge expansion joint rapid maintenance assembly and the bridge expansion joint is completed. Through the arrangement, the technical problems that the quality of the maintained expansion joint cannot meet the durability requirement, and the expansion joint is damaged again after being maintained for a short time are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge maintenance structure, and relates to a bridge expansion joint rapid maintenance assembly and method. BACKGROUND

[0002] The bridge expansion joint refers to a structural joint arranged at a proper position along the construction joint of a building or a structure to prevent the building or the structure from being cracked or damaged due to temperature change of the climate. After long-term use, the concrete beside the joint gap will be broken due to collision. The normal repair process of the structure is as follows: the damaged expansion joint structure to be repaired is cut, the damaged concrete and the steel structure at the position to be repaired are chipped off and washed and cleaned, the anchor steel bars are pre-buried on the side of the original concrete and fixed to form a steel framework, then the formwork is supported, the expansion joint is installed, and the pre-buried steel bars are welded after adjustment and fixation. The pit is washed and the interface agent is sprayed. The super-strong material is mixed and poured layer by layer. After the material is initially cured, it is smoothed and cured, and the solidifying agent is sprayed. After curing, the traffic can be opened. The pouring work is an important step in the repair of the expansion joint.

[0003] At present, the bridge expansion joint repair adopts early strength fast hardening concrete for on-site pouring, manual vibration and smoothing during the repair of the expansion joint concrete structure. However, the quality of the concrete curing is not high, and the strength after curing is not high. Finally, the construction efficiency and the construction quality are affected, and the quality of the repaired expansion joint cannot meet the durability requirement, and the expansion joint is damaged again after a short time of repair. SUMMARY

[0004] Therefore, the present application provides a bridge expansion joint rapid maintenance assembly. The bridge expansion joint rapid maintenance assembly comprises a comb-shaped tooth plate, an anti-corrosion layer, a waterproof layer, a concrete component and fast hardening UHPC, and the number of the comb-shaped tooth plates and the concrete components is two. The comb-shaped tooth plate is a rectangular structure with a preset length. One end of the comb-shaped tooth plate is connected with a plurality of grooves, and there is a preset distance between every two grooves. The two comb-shaped tooth plates are oppositely arranged. The anti-corrosion layer is a rectangular structure arranged at the bottom of the comb-shaped tooth plate. The waterproof layer is a rectangular structure arranged at the bottom of the anti-corrosion layer. The concrete component is a rectangular structure. Two concrete components are arranged below the two comb-shaped tooth plates, and the two concrete components are located at the bottom of the waterproof layer. The bottoms of the two concrete components are fixedly connected to the bridge expansion joint by fast hardening UHPC pouring. The composition of the fast hardening UHPC comprises cementitious material, setting time adjusting agent, sand, water, water reducing agent and steel fiber, and the cementitious material: setting time adjusting agent: sand: water: water reducing agent: steel fiber = 1000: 103: 1100: 209: 5.5: 156.

[0005] In an implementable mode, the concrete member comprises steel bars, metal pieces and embedded bars, and the number of the steel bars, the metal pieces and the embedded bars is multiple; the steel bars have a preset length, the steel bars are arranged in multiple columns and cross each other; the metal pieces are plate-shaped structures, and the metal pieces are arranged between two steel bars; the embedded bars are L-shaped structures, and the embedded bars are arranged at the bottom of the steel bars; the concrete material is used to fix the steel bars, the metal pieces and the embedded bars after being placed, to form a concrete plate.

[0006] In an implementable mode, the steel bars comprise horizontal steel bars and vertical steel bars, and the number of the horizontal steel bars and the vertical steel bars is multiple; the horizontal steel bars are arranged in parallel between multiple horizontal steel bars, the vertical steel bars are arranged in parallel between multiple vertical steel bars, and the horizontal steel bars are arranged perpendicularly between the vertical steel bars; one vertical steel bar is arranged at one end of multiple horizontal steel bars.

[0007] In an implementable mode, the metal pieces are arranged perpendicularly between every two horizontal steel bars, the metal pieces and the horizontal steel bars extend out of the concrete plate by a preset distance, and the part of the metal pieces outside the concrete plate is provided with a through hole.

[0008] In an implementable mode, the waterproof layer is a soft material, and the part of the waterproof layer can form a concave structure between two concrete members when the distance between the two concrete members decreases.

[0009] A method for quickly repairing a bridge expansion joint, using the bridge expansion joint quick repair assembly, comprising the following steps: S1: producing a comb-shaped tooth plate, a waterproof layer and a corrosion-resistant layer according to the size of the bridge expansion joint; S2: producing a concrete member; S3: producing a quick-hardening UHPC; S4: fixing the comb-shaped tooth plate, the waterproof layer, the corrosion-resistant layer and the concrete member together to form a bridge expansion joint quick repair assembly; S5: placing the bridge expansion joint quick repair assembly on the bridge expansion joint, pouring the quick-hardening UHPC to complete the fixing of the bridge expansion joint quick repair assembly and the bridge expansion joint.

[0010] In an implementable mode, S2 specifically includes the following steps: S2.1: multiple transverse steels are arranged in parallel, and a preset distance is provided between every two transverse steels; S2.2: multiple vertical steels are arranged in parallel on the multiple transverse steels, and the multiple vertical steels are arranged perpendicularly to the multiple transverse steels; S2.3: a wire is used to fix the connection between each transverse steel and vertical steel; S2.4: a metal piece is arranged between every two transverse steels, and a pre-embedded piece is arranged at the bottom of the transverse steel; and S2.5: after the arrangement of S2.1-S2.4, pouring is performed by using C50 steel fiber reinforced concrete to form a concrete component.

[0011] In an implementable mode, S3 specifically includes the following steps: S3.1: a water reducing agent and water are mixed to form a solvent; S3.2: a gel material and sand are pre-mixed and then put into a mixer, and then part of the solvent is added and fully stirred in the mixer to form a first mixture; S3.3: the remaining solvent is added to the first mixture, and then a setting time adjusting agent is added and stirred to form a second mixture; and S3.4: steel fibers are gradually added to the second mixture while stirring to form the fast-hardening UHPC.

[0012] In an implementable mode, S4 specifically includes the following steps: S4.1: two comb-shaped tooth plates are arranged oppositely; S4.2: a corrosion-resistant layer is arranged at the bottom of one of the comb-shaped tooth plates, a waterproof layer is arranged at the bottom of the corrosion-resistant layer, and a concrete component is arranged at the bottom of the corrosion-resistant layer; S4.3: after the arrangement of the comb-shaped tooth plates, the corrosion-resistant layer, the waterproof layer, and the concrete component according to S4.1-S4.2, the semi-finished product is formed by fixing the components by using C50 steel fiber reinforced concrete; and S4.4: after curing the semi-finished product, the bridge expansion joint rapid repair assembly is formed by removing the mold.

[0013] In an implementable mode, S5 specifically includes the following steps: S5.1: the bridge expansion joint rapid repair assembly is transported to a designated position by a crane for alignment and installation; and S5.2: the bridge expansion joint rapid repair assembly is fixed to the expansion joint of the bridge by pouring the fast-hardening UHPC.

[0014] The beneficial effects of the present application: through S1: according to the size of the bridge expansion joint, the comb type tooth plate, the waterproof layer and the anticorrosion layer are made; S2: the concrete component is made; S3: the fast hardening UHPC is made; S4: the comb type tooth plate, the waterproof layer, the anticorrosion layer and the concrete component are fixed together to form the bridge expansion joint rapid repair assembly; S5: the bridge expansion joint rapid repair assembly is placed on the bridge expansion joint, and the fast hardening UHPC is poured to complete the fixing of the bridge expansion joint rapid repair assembly and the bridge expansion joint, the bridge expansion joint rapid repair assembly prepared through the above steps and the fast hardening UHPC prepared through the cementing material, the coagulation time adjusting agent, the sand, the water, the water reducing agent and the steel fiber are poured to realize that the bridge expansion joint rapid repair assembly is fixed on the bridge expansion joint, the fast hardening UHPC of the present application has excellent fluidity performance, realizes quantitative evaluation of the mixture viscosity and the operable time, and the fast hardening UHPC enables the bridge expansion joint rapid repair assembly and the bridge expansion joint to be firmly connected. While ensuring the construction strength, the construction quality can be significantly improved, so that the overall quality of the comb tooth plate expansion joint repair is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a specific structure sectional view of the present application; Figure 2 is a specific structure plan view of the present application; Figure 3 is a side view of the present application; Figure 4 is a specific structure view of the internal mixing component of the present application. DETAILED DESCRIPTION

[0016] The following examples are provided to better further understand the present application, and are not limited to the best mode, and do not constitute a limitation on the content and protection scope of the present application, and any person under the inspiration of the present application or the combination of the present application with other prior art features obtains any product same or similar to the present application, which falls within the protection scope of the present application.

[0017] It should be noted that the UHPC described in the present application is an ultra-high performance concrete (Ultra-High Performance Concrete).

[0018] The application provides a bridge expansion joint rapid maintenance assembly, which comprises a comb-shaped tooth plate 100, an anticorrosive layer 200, a waterproof layer 300, a concrete component 400 and a fast-hardening UHPC 500, and the number of the comb-shaped tooth plate 100 and the concrete component 400 is two; the comb-shaped tooth plate 100 is a rectangular structure with a preset length, one end of the comb-shaped tooth plate 100 is connected with a plurality of grooves, there is a preset distance between every two grooves, and the two comb-shaped tooth plates 100 are oppositely arranged; the anticorrosive layer 200 is a rectangular structure and is arranged at the bottom of the comb-shaped tooth plate 100; the waterproof layer 300 is a rectangular structure and is arranged at the bottom of the anticorrosive layer 200; the concrete component 400 is a rectangular structure, two concrete components 400 are arranged below the two comb-shaped tooth plates 100, and the two concrete components 400 are located at the bottom of the waterproof layer 300; the bottoms of the two concrete components 400 are fixedly connected on the bridge 600 expansion joint through the fast-hardening UHPC 500; the composition of the fast-hardening UHPC comprises cementing material, setting time regulator, sand, water, water reducing agent and steel fiber, and the cementing material:setting time regulator:sand:water:water reducing agent:steel fiber = 1000:103:1100:209:5.5:156.

[0019] Specifically, as Figures 1 to 2As shown, the main structure of the bridge expansion joint rapid repair assembly includes a comb-shaped tooth plate 100, an anticorrosive layer 200, a waterproof layer 300, a concrete component 400 and fast-hardening UHPC 500. Among them, the number of comb-shaped tooth plates 100 is two, including a large comb-shaped tooth plate 110 and a small comb-shaped tooth plate 120 according to actual needs. The opposite ends of the large comb-shaped tooth plate 110 and the small comb-shaped tooth plate 120 are connected together by a plurality of grooves, and there is a preset distance between every two grooves, forming a protrusion, and the width of the protrusion is smaller than the width of the groove. When laying out, the protrusion of the large comb-shaped tooth plate 110 can slide along the groove of the small comb-shaped tooth plate 120, and the protrusion of the small comb-shaped tooth plate 120 can slide along the groove of the large comb-shaped tooth plate 110, that is, the large comb-shaped tooth plate 110 is used in cooperation with the small comb-shaped tooth plate 120. The anticorrosive layer 200 is provided to facilitate the relative sliding between the large comb-shaped tooth plate 110 and the small comb-shaped tooth plate 120. The anticorrosive layer can be provided at the bottom of the large comb-shaped tooth plate 110 or the bottom of the small comb-shaped tooth plate 120. In this embodiment, the anticorrosive layer 200 is provided at the bottom of the small comb-shaped tooth plate 120. In order to prevent water from entering the bridge 600 in rainy or snowy weather, a waterproof layer 300 is also provided. The size of the waterproof layer 300 is the sum of the bottom areas of the large comb-shaped tooth plate 110 and the small comb-shaped tooth plate 120. Such a setting facilitates the distance between the large comb-shaped tooth plate 110 and the small comb-shaped tooth plate 120 to be large when the bridge 600 is cold contracted, and also prevents water from entering the bridge 600. In order to facilitate the overall connection, a concrete component 400 is also provided. The number of concrete components 400 is two, which are respectively matched with the large comb-shaped tooth plate 110 and the small comb-shaped tooth plate 120. It should be noted that the two concrete components 400 are the same size and are respectively arranged below the large comb-shaped tooth plate 110 and the small comb-shaped tooth plate 120. One end of the large comb-shaped tooth plate 110 is fixed to one end of one of the concrete components 400 by concrete, and one end of the small comb-shaped tooth plate 120 is fixed to one end of the other concrete component 400 by concrete. Then the whole structure is placed in the expansion joint of the bridge 600, and is poured by fast-hardening UHPC 500. The composition of fast-hardening UHPC 500 includes cementitious material, setting time regulator, sand, water, water reducing agent and steel fiber. The fast-hardening UHPC 500 obtained in this way has excellent fluidity and strong supporting force. The fast-hardening UHPC makes the bridge expansion joint rapid repair assembly and the bridge 600 expansion joint firmly connected.

[0020] In an implementable mode, the concrete member 400 comprises a plurality of steel bars 410, a plurality of metal pieces 420 and a plurality of embedded bars 430; the steel bars 410 have a preset length, are arranged in multiple rows and cross each other vertically; the metal pieces 420 are plate-shaped structures and are arranged between two steel bars; the embedded bars 430 are cylindrical structures with a preset length and are arranged perpendicularly between the steel bars 410; and the concrete material is used to fix the steel bars 410, the metal pieces 420 and the embedded bars 430 after being placed in positions, thereby forming a concrete plate.

[0021] Specifically, as shown in Figures 3 to 4 the concrete member 400 mainly comprises the steel bars 410, the metal pieces 420 and the embedded bars 430. The steel bars 410 are arranged in multiple rows and cross each other vertically, thereby forming a rectangular structure; the metal pieces 420 are arranged between every two steel bars 410; and the embedded bars 430 are L-shaped structures arranged at the bottom of the steel bars 410, so as to strengthen the connection between the concrete member 400 and the expansion joint of the bridge 600. After being arranged according to the above layout, the concrete is used to pour, fix and form.

[0022] In an implementable mode, the steel bars 410 comprise a plurality of horizontal steel bars 411 and a plurality of vertical steel bars 412; the horizontal steel bars 411 are arranged in parallel between each other, the vertical steel bars 412 are arranged in parallel between each other and the horizontal steel bars 411 are arranged perpendicularly to the vertical steel bars 412; and one vertical steel bar 412 is arranged at one end of the horizontal steel bars 411. The metal pieces 420 are arranged perpendicularly between every two horizontal steel bars 411, the metal pieces 420 and the horizontal steel bars 411 extend outward from the concrete plate by a preset distance, and the metal pieces 420 outside the concrete plate are provided with through holes.

[0023] Specifically, as shown in Figure 1 the horizontal steel bars 411 and the vertical steel bars 412 are arranged perpendicularly to each other, thereby forming a skeleton of a rectangular structure; one vertical steel bar 412 is connected to one end of the horizontal steel bars 411 to seal the skeleton; the metal pieces 420 are arranged at one end of the unsealed horizontal steel bars 411; the metal pieces 420 and the horizontal steel bars 411 extend outward from the concrete plate by a preset distance, and the metal pieces 420 outside the concrete plate are provided with through holes; and one horizontal steel bar 411 penetrates the through holes, so that the overall structure is more stable.

[0024] In an implementable manner, the waterproof layer 300 is a soft material, and part of the waterproof layer 300 can form a concave structure between the two concrete members 400 when the distance between the two concrete members 400 is reduced. Such a setting can better prevent water from entering the bridge 600.

[0025] A method for quickly repairing a bridge expansion joint using the bridge expansion joint quick repair assembly, wherein the method comprises the following steps: S1: producing the comb-shaped tooth plate 100, the waterproof layer 200, and the corrosion-resistant layer 300 according to the size of the bridge expansion joint of the bridge 600; S2: producing the concrete member 400; S3: producing the fast-hardening UHPC 500; S4: fixing the comb-shaped tooth plate 100, the waterproof layer 200, the corrosion-resistant layer 300, and the concrete member 400 together to form the bridge expansion joint quick repair assembly; and S5: placing the bridge expansion joint quick repair assembly on the bridge expansion joint of the bridge 600 and pouring the fast-hardening UHPC 500 to complete the fixing of the bridge expansion joint quick repair assembly and the bridge expansion joint of the bridge 600.

[0026] Specifically, the bridge expansion joint quick repair assembly is prepared and installed in the bridge expansion joint of the bridge 600 according to the following steps: first, the appropriate bridge expansion joint quick repair assembly is produced according to the size of the bridge expansion joint of the bridge 600, wherein the comb-shaped tooth plate 100, the waterproof layer 200, and the corrosion-resistant layer 300 can be purchased or prepared, and this technology is existing and will not be described in detail. At the same time, two concrete members 400 are produced and fixedly connected to the large comb-shaped tooth plate 110 and the small comb-shaped tooth plate 120, respectively, and part of the large comb-shaped tooth plate 110 can be located above the concrete member 400 below the small comb-shaped tooth plate 120. Then, the fast-hardening UHPC 500 is prepared, and after the bridge expansion joint quick repair assembly is placed on the bridge expansion joint of the bridge 600, pouring is performed through the fast-hardening UHPC 500, and then the fixing is completed.

[0027] S2 specifically comprises the following steps: S2.1: placing a plurality of transverse steel bars 411 in parallel, and having a preset distance between every two transverse steel bars 411; S2.2: placing a plurality of vertical steel bars 412 on the plurality of transverse steel bars 411 in parallel, and the plurality of vertical steel bars 412 and the plurality of transverse steel bars 411 are arranged perpendicularly; S2.3: fixing through a wire at the connection between each transverse steel bar 411 and vertical steel bar 412; S2.4: arranging a metal piece 420 between every two transverse steel bars 411 and arranging a pre-embedded piece 430 at the bottom of the transverse steel bar; and S2.5: after the layout of S2.1-S2.4, pouring through C50 steel fiber concrete to form the concrete member.

[0028] The layout of S2.1-S2.4 is further limited to the size of the prepared concrete component 400 according to the actual situation. It should be noted that the layout of the steel bars 410, metal pieces 420 and embedded bars 430 is carried out in the mold. The transverse steel bars 411 selected in this embodiment are Φ12 HRB400 grade steel bars with a spacing of 150mm. The vertical steel bars 412 are Φ14 HRB400 grade steel bars with a spacing of 150mm, and are used for steel bar connection of slab beam. The size of the metal piece 420 of the concrete component 400 under the large comb plate 110 is 380mmx43mmx30mm, and the size of the metal piece 420 of the concrete component 400 under the small comb plate 120 is 600mmx43mmx30mm.

[0029] In an implementable manner, S3 specifically includes the following steps: S3.1: mixing water reducing agent and water to form a solvent; S3.2: after pre-mixing the gel material and sand, the mixture is put into a mixer, and then part of the solvent is added, and the mixture is fully stirred in the mixer to form a first mixture; S3.3: after adding the remaining solvent to the first mixture, a setting time adjusting agent is added and stirred to form a second mixture; S3.4: gradually add steel fibers to the second mixture while stirring to form fast-hardening UHPC.

[0030] It should be noted that the water reducing agent and water are mixed to form a solvent, and then the gel material and sand are pre-mixed and put into a mixer, and then 80% of the solvent is added, and the mixture is fully stirred in the mixer for 5 minutes to form a first mixture. After adding the remaining solvent to the first mixture, continue to stir for 3 minutes to form a second mixture, then add a setting time adjusting agent and stir until uniform, then gradually add steel fibers. After all the steel fibers are added, stir for another 2 minutes to form fast-hardening UHPC.

[0031] The mix proportion design principle of the fast hardening UHPC is mainly based on the close packing theory, and the Dinger-Funk close packing theory is adopted. Through the establishment of a model, parameter calculation, planning solution and test verification, the concrete mix proportion is determined as cementitious material: setting time regulator: sand: water: water reducing agent: steel fiber = 1000: 103: 1100: 209: 5.5: 156. The maximum flowability of the fast hardening UHPC prepared therefrom is 320 mm, and the fast hardening UHPC has excellent flowability. Through the improvement of the test method, the quantitative evaluation of the mix viscosity and the workable time is realized, and the performance indicators fully meet the rapid maintenance construction requirements. The average value of the flexural strength of the fast hardening UHPC is 13.5 MPa, and the peak value of the tensile strength is 5.8 MPa. In terms of flexural toughness, the flexural toughness coefficients I5, I10 and I20 of the fast hardening UHPC are 5.2, 11.2 and 24.6 respectively, and the fast hardening UHPC exhibits excellent flexural toughness and tensile performance. At the same time, the 3h gripping strength of the fast hardening UHPC can reach 6.44 MPa, which is about 1.27 times the age gripping strength of C50 concrete-steel. The 3d gripping strength of UHPC-steel is 16.98 MPa. The excellent gripping strength of the fast hardening UHPC and the steel provides strong support for the safety of the fast hardening UHPC as a post-cast strip material.

[0032] In an implementable manner, S4 specifically includes the following steps: S4.1: two comb-shaped tooth plates are arranged oppositely; S4.2: a corrosion-resistant layer is arranged at the bottom of one of the comb-shaped tooth plates, a waterproof layer is arranged at the bottom of the corrosion-resistant layer, and a concrete member is arranged at the bottom of the corrosion-resistant layer; S4.3: after the comb-shaped tooth plates, the corrosion-resistant layer, the waterproof layer and the concrete member are placed according to the layout of S4.1-S4.2, the C50 steel fiber reinforced concrete is used for fixing, and a semi-finished product is formed; and S4.4: after the semi-finished product is cured, the formwork is removed, and a bridge expansion joint rapid repair assembly is formed.

[0033] It is emphasized here that the steel bars should not be disturbed during pouring of the C50 steel fiber reinforced concrete, and the concrete should be vibrated to ensure compaction, and the concrete should be cured by spraying water for at least 14 days. After the strength reaches 50 MPa, the concrete member 400 can be hoisted and transported. The side formwork can be removed after the strength of the concrete member 400 reaches 1.2 MPa.

[0034] Finally, S5 specifically includes the following steps: S5.1: hoisting and transporting to a specified position for alignment and installation by using a crane 700; S5.2: pouring the fast hardening UHPC to fix the bridge expansion joint rapid repair assembly to the expansion joint of the bridge 600.

[0035] The application modifies the fast hardening UHPC, so that the fast hardening UHPC has the fast hardening characteristics, the cementitious material hydration reaction in the fast hardening UHPC is completed at an early stage, and thus the autogenous shrinkage phenomenon can be greatly reduced or even basically eliminated, so that the total shrinkage of the fast hardening UHPC is kept at a low level. Through experimental research and demonstration, it is shown that the shrinkage of the fast hardening UHPC is basically completed at an early stage, and the creep change trend from 2h to 28d is not obvious, and the 28d creep of the fast hardening UHPC after setting is only 30% of that of the non-fast hardening UHPC, and is far lower than that of ordinary concrete under the same stress condition. It can be seen that the low shrinkage and creep are an important characteristic of the fast hardening UHPC different from the non-fast hardening UHPC, and it is this characteristic that makes the fast hardening UHPC can be well applied to the wet joint and other post-cast parts. The fast hardening UHPC is matched with the bridge expansion joint rapid repair assembly, and the technical problem that the quality of the expansion joint after repair cannot meet the durability requirement and the expansion joint is damaged again after a short time of repair is solved.

[0036] The above is only the preferred specific embodiment of the application, but the protection scope of the application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and concept of the application within the scope disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A rapid repair component for bridge expansion joints, characterized in that, It includes a comb-shaped toothed plate, an anti-corrosion layer, a waterproof layer, a concrete component, and a fast-setting UHPC, and the number of the comb-shaped toothed plate and the concrete component is two; The comb-shaped toothed plate is a rectangular structure with a preset length. One end of the comb-shaped toothed plate is connected by multiple grooves. There is a preset distance between every two grooves, and the two comb-shaped toothed plates are arranged opposite each other. The anti-corrosion layer has a rectangular structure and is located at the bottom of the comb-shaped tooth plate; The waterproof layer has a rectangular structure and is disposed at the bottom of the anti-corrosion layer; The concrete component is a rectangular structure. Two concrete components are placed below the two comb-shaped toothed plates and are located at the bottom of the waterproof layer. The bottom of the two concrete components is fixedly connected to the bridge expansion joint by quick-setting UHPC pouring. The components of the fast-setting UHPC include cementitious material, setting time regulator, sand, water, water-reducing agent and steel fiber, and the ratio of cementitious material: setting time regulator: sand: water: water-reducing agent: steel fiber is 1000:103:1100:209:5.5:

156.

2. The bridge expansion joint quick repair component according to claim 1, characterized in that, The concrete component includes reinforcing bars, metal parts, and embedded bars, and the number of each of the reinforcing bars, metal parts, and embedded bars is multiple. The reinforcing bars have a preset length, and are arranged in multiple columns, intersecting horizontally and vertically. The metal component has a plate-like structure and is disposed between two of the reinforcing bars; The embedded bar has an L-shaped structure and is located at the bottom of the reinforcing bar; The concrete material is used to position and fix the reinforcing bars, metal parts, and embedded bars to form a concrete slab.

3. The bridge expansion joint quick repair component according to claim 2, characterized in that, The reinforcing bars include horizontal reinforcing bars and vertical reinforcing bars, and there are multiple horizontal reinforcing bars and multiple vertical reinforcing bars. The plurality of horizontal reinforcing bars are arranged in parallel with each other, the plurality of vertical reinforcing bars are arranged in parallel with each other, and the horizontal reinforcing bars and the vertical reinforcing bars are arranged perpendicular to each other; One of the vertical reinforcing bars is located at one end of the plurality of horizontal reinforcing bars.

4. The bridge expansion joint quick repair component according to claim 3, characterized in that, The metal component is vertically arranged between every two transverse reinforcing bars. Both the metal component and the transverse reinforcing bars extend outward from the concrete slab by a predetermined distance, and the portion of the metal component located outside the concrete slab has a through hole.

5. The bridge expansion joint quick repair component according to claim 4, characterized in that, The waterproof layer is made of a soft material, and a portion of the waterproof layer can form a concave structure between the two concrete members when the distance between them decreases.

6. A method for rapid repair of bridge expansion joints, characterized in that, Using the bridge expansion joint quick repair kit according to claims 1-5, wherein one step includes the following steps: S1: Fabricate comb-shaped toothed plates, waterproof layer, and anti-corrosion layer according to the size of the bridge expansion joint; S2: Fabrication of concrete components; S3: Creating fast-harding UHPCs; S4: Fix the comb-shaped toothed plate, waterproof layer, anti-corrosion layer and concrete components together to form a bridge expansion joint quick repair component; S5: Place the bridge expansion joint quick repair component on the bridge expansion joint and pour it using fast-setting UHPC to fix the bridge expansion joint quick repair component to the bridge expansion joint.

7. The method for rapid repair of bridge expansion joints according to claim 6, characterized in that, S2 specifically includes the following steps: S2.1: Place multiple horizontal reinforcing bars in parallel, with a preset distance between every two horizontal reinforcing bars; S2.2: Place multiple vertical reinforcing bars parallel to each other on multiple horizontal reinforcing bars, and set the multiple vertical reinforcing bars and multiple horizontal reinforcing bars perpendicular to each other; S2.3: Secure the joints of each horizontal and vertical reinforcing bar with wire; S2.4: Metal parts are placed between every two transverse reinforcing bars, and embedded parts are placed at the bottom of the transverse reinforcing bars; S2.5: After the layout of S2.1-S2.4, C50 steel fiber reinforced concrete is poured to form a concrete component.

8. The method for rapid repair of bridge expansion joints according to claim 7, characterized in that, S3 specifically includes the following steps: S3.1: The water-reducing agent and water are first mixed to form a solvent; S3.2: After the gel material and sand are pre-mixed, they are put into a mixer, and then some solvent is added. The mixture is stirred thoroughly in the mixer to form the first mixture. S3.3: After adding the remaining solvent to the first mixture, add the setting time regulator and stir to form the second mixture; S3.4: Steel fibers are gradually added to the second mixture while stirring to form fast-hardening UHPC.

9. The method for rapid repair of bridge expansion joints according to claim 8, characterized in that, S3 specifically includes the following steps: S4.1: Two comb-shaped toothed plates are arranged opposite each other; S4.2: The anti-corrosion layer is placed at the bottom of one of the comb-shaped toothed plates, the waterproof layer is at the bottom of the anti-corrosion layer, and the concrete component is at the bottom of the anti-corrosion layer; S4.3: After arranging the comb-shaped toothed plate, anti-corrosion layer, waterproof layer and concrete components according to the layout of S4.1-S4.2, fix them with C50 steel fiber concrete to form a semi-finished product; S4.4: After curing the semi-finished product, the mold is removed to form a rapid repair component for bridge expansion joints.

10. The method for rapid repair of bridge expansion joints according to claim 9, characterized in that, S4 specifically includes the following steps: S5.1: The equipment is lifted and transported to the designated location by crane for alignment and installation; S5.2: The bridge expansion joint quick repair component is fixed to the bridge expansion joint by pouring through fast-hardening UHPC.

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