CN-224213162-U - Under-bridge reinforcing structure for improving overall stress performance of existing hollow slab

Abstract

The utility model relates to the technical field of bridge maintenance, in particular to an under-bridge reinforcing structure for improving the overall stress performance of an existing hollow slab, which comprises a composite fiber grid arranged at the bottom of the hollow slab and used for connecting a plurality of hollow slabs into a whole, a plurality of fixing assemblies used for fixing the composite fiber grid at the bottom of the hollow slab, and a grid bonding layer used for wrapping and bonding the fixing assemblies and the composite fiber grid at the bottom of the hollow slab. After the composite fiber grid is fixed at the bottom of the hollow plate, the composite fiber grid, the fixing component and the hollow plates are formed into an integrated structure through the grid bonding layer, and the composite fiber grid, the fixing component and the hollow plates can be mutually restrained longitudinally and transversely, so that the effect of bidirectional common stress is achieved, the integral plate stress mode under the action of automobile load is formed by reinforcing the existing hollow plates, and the integral stress performance and durability of the hollow plates are greatly improved.

Inventors

• LI QIANKUN
• JIAO SHENG
• YANG ZINAN
• Jie Jinliang
• ZHANG YING
• HUANG YUMING
• LI JIAQING
• WU JIANZHONG
• LI SHENGCAI
• WEN JIANXING
• LIANG XIONG
• LIAO HONGJUN
• HUANG YIDONG
• Huang Qintao
• CHEN XI

Assignees

• 广东和立交通养护科技有限公司

Dates

Publication Date

20260508

Application Date

20250528

Claims (8)

1. 1. The utility model provides a reinforcing structure under bridge for improving whole atress performance of existing hollow slab, existing hollow slab (1) has a plurality of and arranges side by side, its characterized in that reinforcing structure under bridge is including locating hollow slab (1) bottom and be used for connecting into a plurality of hollow slab (1) composite fiber net (2) an organic whole to and a plurality of fixed subassembly (3) that are used for fixing composite fiber net (2) in hollow slab (1) bottom, reinforcing structure under bridge still includes grid tie layer (4) that are used for wrapping up fixed subassembly (3) and composite fiber net (2) and bond in hollow slab (1) bottom.
2. 2. An under-bridge reinforcement structure for improving the overall load bearing performance of an existing hollow slab according to claim 1, characterized in that the composite fiber mesh (2) has a gap with the bottom of the hollow slab (1).
3. 3. An under-bridge reinforcement structure for improving the overall load carrying capacity of an existing hollow slab according to claim 1, characterized in that the thickness of the grid tie layer (4) is 3-5cm.
4. 4. An under-bridge reinforcement structure for improving the overall load bearing properties of existing hollow slabs according to claim 1, characterized by a rigid net-like structure of composite fiber mesh (2) formed by several longitudinal and several transversal strips of composite fibers (20).
5. 5. An under-bridge reinforcement structure for improving the overall load bearing performance of an existing hollow slab according to claim 4, wherein the fixing component (3) comprises a clamping piece (30) which is matched with the composite fiber mesh (2) in a clamping way and a fixing piece (31) for fixing the clamping piece (30) at the bottom of the hollow slab (1).
6. 6. An under-bridge reinforcement structure for improving the overall load carrying capacity of an existing hollow slab according to claim 5, characterized in that said snap-in elements (30) are provided at the nodes of the composite fiber mesh (2).
7. 7. The under-bridge reinforcement structure for improving the overall stress performance of the existing hollow slab according to claim 5, wherein the buckling piece (30) is in a cuboid shape, a first clamping groove (32) clamped with the longitudinal composite fiber strip (20) is formed on one side surface, and a second clamping groove (33) clamped with the transverse composite fiber strip (20) is formed on the other side surface adjacent to the first clamping groove (32).
8. 8. The under-bridge reinforcement structure for improving the overall stress performance of the existing hollow plates according to claim 5, wherein hinge joints (5) are arranged between the adjacent hollow plates (1), and the under-bridge reinforcement structure further comprises hinge joint bonding layers (6) arranged at the hinge joints (5) and used for bonding the adjacent hollow plates (1).

Description

Under-bridge reinforcing structure for improving overall stress performance of existing hollow slab [ Field of technology ] The utility model relates to the technical field of bridge maintenance, in particular to an under-bridge reinforcing structure for improving the overall stress performance of an existing hollow slab. [ Background Art ] The hollow slab bridge has the advantages of light structure, convenience in prefabrication and assembly, suitability for standardized construction processes and the like, and is widely applied to highway bridge construction. However, with the increase of highway traffic demands, such as the increase of traffic flow, the promotion of load level, frequent traffic of heavy vehicles, etc., the hollow slab bridge breaks after long-term operation, resulting in the problems of horizontal connection failure of the hollow slab, poor overall stress performance, etc., which seriously threatens the driving safety and the service life of the bridge. The maintenance and reinforcement aiming at the poor overall stress performance of the hollow slab bridge are mainly divided into two categories at present, namely durability improvement and bearing capacity reinforcement. Durability improvement measures such as chemical grouting of hinge joints are not applicable to bridges with serious hinge joint diseases although the influence on traffic is small and the construction speed is high; the common method for reinforcing the bearing capacity comprises bridge deck reinforcement, adhesive steel plate reinforcement, external prestress reinforcement, transverse connection reinforcement, shear steel bar reinforcement and the like. The prior reinforcement technology has the characteristics and the limitations, and has a certain degree of overlap on the improvement effect of diseases. In particular, some reinforcement techniques have long construction period and complex process, and meanwhile, certain reinforcement structures have huge body shapes to influence the clearance under the bridge. In addition, during the reinforcement construction, interruption of traffic on the bridge is inevitably caused, resulting in adverse effects. The present utility model has been made in view of the above-mentioned problems. [ utility model ] The utility model aims to solve the technical problem of providing an under-bridge reinforcing structure for improving the overall stress performance of the existing hollow slab, which is performed under the bridge during construction and can solve the problem of traffic interruption on the bridge. Meanwhile, the composite fiber grid is fixed at the bottom of the hollow slab through the fixing component, a plurality of hollow slabs are connected into a whole through the composite fiber grid, the fixing component and the plurality of hollow slabs form an integrated structure through the grid bonding layer, the construction is simple and efficient, the problem that the existing reinforcing technology is long in construction period, complex in process and huge in reinforcing structure size and affects the clearance under the bridge is solved, the under-bridge reinforcing structure can be mutually restrained longitudinally and transversely, the effect of bidirectional common stress is achieved, the integral slab stress mode under the action of reinforcing an existing hollow slab to form an automobile load is achieved, and the integral stress performance and durability of the hollow slab are greatly improved. In order to solve the technical problems, the utility model provides an under-bridge reinforcement structure for improving the overall stress performance of an existing hollow slab, wherein the existing hollow slab is provided with a plurality of composite fiber grids which are arranged in parallel and are arranged at the bottom of the hollow slab to connect the plurality of hollow slabs into a whole, a plurality of fixing assemblies for fixing the composite fiber grids at the bottom of the hollow slab, and a grid bonding layer for wrapping and bonding the fixing assemblies and the composite fiber grids at the bottom of the hollow slab. The under-bridge reinforcing structure for improving the overall stress performance of the existing hollow slab has the advantages that the composite fiber grid is in clearance with the bottom of the hollow slab. The underbridge reinforcing structure for improving the overall stress performance of the existing hollow slab has the advantage that the thickness of the grid bonding layer is 3-5 cm. The under-bridge reinforcing structure for improving the overall stress performance of the existing hollow slab has the advantage that the composite fiber grid is a rigid net structure formed by a plurality of longitudinal and a plurality of transverse composite fiber strips. The under-bridge reinforcement structure for improving the overall stress performance of the existing hollow slab comprises the clamping pieces matched with the composite fiber