Mechanism for measuring relative vertical displacement between adjacent hollow slabs of hollow slab bridge

Abstract

The invention discloses a mechanism for measuring relative vertical displacement between adjacent hollow slabs of a hollow slab bridge, and the mechanism comprises a hollow slab bridge body which comprises multiple groups of first hollow slabs and multiple groups of second hollow slabs. The hollow slab bridge comprises a plurality of groups of first hollow slabs and second hollow slabs, the plurality of groups of first hollow slabs and second hollow slabs are indirectly arranged and combined to form a hollow slab bridge body, slab joints are formed between the adjacent first hollow slabs and second hollow slabs, measuring mechanisms are fixedly arranged at the bottom ends of the opposite sides of the adjacent first hollow slabs and second hollow slabs, and the positions of the measuring mechanisms vertically correspond to the positions of the slab joints. By arranging the first measuring assembly and the second measuring assembly to form the measuring mechanism, the change condition of the relative vertical displacement between each adjacent group of first hollow slabs and second hollow slabs in the hollow slab bridge can be measured, so that the stress position and degree of each group of single slabs of the hollow slab bridge can be effectively, quickly and accurately judged; and reliable basis is provided for bridge maintenance and reinforcement.

Description

technical field [0001] The invention relates to the technical field of bridge accessories, in particular to a measuring mechanism for relative vertical displacement between adjacent hollow slabs of a hollow slab bridge. Background technique [0002] Hollow slab bridge, a slab bridge with holes in the cross section of the slab load-bearing structure. It is often assembled with prefabricated reinforced concrete or prestressed concrete components. The slab bridge mainly bears the longitudinal bending moment. In order to reduce the ineffective concrete in the central tension area of ​​the slab, a cavity is opened, but the wall of the cavity must have sufficient thickness to resist shearing. . This kind of bridge is light in weight, small in building height, easy to erect, and widely used in small highway bridges. [0003] The slab-girders of the hollow slab bridge are connected transversely through hinge joints to transfer shear force, so as to realize the lateral transfer of ...

AI Technical Summary

Problems solved by technology

With the rapid development of the transportation industry, the number of heavy vehicles and overloaded vehicles is increasing, resulting in broken hinge joints, failure of the lateral connection between the plate girders of hollow slab bridges, and the emergence of single beams of hollow slab girders, which weakens the overall effect of the superstructure and the bridge The overall bearing capacity of the slab girder is too large, which will aggravate the cracking of the bridge deck pavement, seriously affect the safety of the bridge in the operation stage, and cause serious hidden dangers to driving safety

[0004] At present, the force detection method of bridge girder slabs is mainly based on visual observation, lacking a proprietary measuring mechanism for the relative vertical displacement between adjacent hollow slabs of the hollow slab bridge, resulting in poor detection reliability, and usually only when the bridge deck has been paved The phenomenon of "single-slab stress" in beams and slabs can only be judged after damage and water seepage between the slabs. Therefore, we propose a measuring mechanism for the relative vertical displacement between adjacent hollow slabs of the hollow slab bridge to solve the above problems

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