Single plate force-bearing reinforcing method of hollow slab bridge

Abstract

The invention relates to a single plate force-bearing reinforcing method of a hollow slab bridge. The single plate force-bearing reinforcing method includes that the original bridge deck pavement is shoveled, hinge joint concrete is removed, defects and cracks of the original hollow slab bridge beam body are processed, strip-shaped steel plates are transversely pasted on the upper surface and the lower surface of the hollow slab bridge in the longitudinal bridge direction at certain intervals, split screws penetrate through drilled holes at the hinge joint position, a counter-force frame is arranged, a wedge-shaped block is embedded between the counter-force frame and the steel plates, and the steel plates are pressurized and pasted in sealing mode and then are positioned and fixed; the counter-force frame is demounted after sticky steel glue is cured; cavities in beam joints are subjected to pressure grouting, shear reinforcements are placed into the top surface of a hollow slab, a reinforcement mesh is reconstructed, and the bridge deck reinforcement mesh and the implanted reinforcements are connected in binding or point welding mode to form a whole body; steel fiber reinforced concrete is poured and waterproof coatings are sprayed; and bituminous concrete is paved. The single plate force-bearing reinforcing method improves transverse load distribution, steel plate pasting reliability and bridge integral force-bearing performance on the premise of preventing hollow slab beam body damage, not changing a structural force-bearing system and not interrupting the traffic.

Description

technical field [0001] The invention relates to a reinforcement method suitable for the stress on a single plate of a hollow slab bridge due to hinge joint failure. Background technique [0002] Hollow slab bridge is a commonly used bridge type in bridge engineering in my country. The structure of the bridge is simple, relatively low in height compared to T-beams, convenient to prefabricate, economical in materials, easy to factory and standardized construction, and the veneer has good stability in the process of transportation and hoisting, so it has been vigorously promoted in the project , is the structural form commonly used in the design of medium and small bridges in my country. The hollow slabs of the hollow slab bridge are connected by shallow hinges, which can meet the traffic demand when the traffic volume is not large and the vehicle load is small in the past. However, with the acceleration of my country's economic construction and the increase of modern traffic ...

AI Technical Summary

Problems solved by technology

This method can partially improve the actual working performance of the hinged joints and improve the lateral load distribution of the plate girder, but it does not fundamentally solve the overall stress problem. With the development of heavy-duty traffic, the bridge deck pavement and hinged joints may be damaged again

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