Telescoping unit with lower support platform

Abstract

The invention relates to a building expansion and contraction device, and provides an expansion and contraction device with a lower supporting platform. The expansion and contraction device comprises two edge beams located on the two sides of an expansion joint and arranged oppositely, and further comprises a waterproof rubber strip clamped between the two edge beams. Two sliding plates in one-to-one correspondence with the two edge beams are arranged under the waterproof rubber strip, each sliding plate extends horizontally to the other edge beam from the corresponding edge beam, and the ends, away from the corresponding edge beams, of the two sliding plates are overlapped. According to the expansion and contraction device, the two sliding plates provide vertical supporting for the waterproof rubber strip in the vertical direction, and thus the situation that after gravel enters the expansion joint, wheels roll the gravel when passing, the gravel extrudes the waterproof rubber strip, and consequently the waterproof rubber strip sheds from the edge beams can be avoided; besides, the sliding plates can generate vertical resilient acting force, and thus wheels can bring out gravel after passing.

Description

technical field [0001] The invention relates to bridges and other building telescopic devices, in particular to a telescopic device with a lower support platform. Background technique [0002] The telescopic device is a key part of the bridge components and plays an important role in realizing the bridge function. The national standard "Road Engineering Terminology Standard" (GBJ124-1988) and the traffic industry standard "Highway Engineering Terminology and Structural Terminology" (JTJ 002-87) define the expansion device of the bridge as: in order to make the vehicle pass the bridge deck smoothly and meet the bridge deck structure Deformation needs, the general term for devices installed at bridge deck expansion joints. [0003] At present, the commonly used bridge expansion devices can be divided according to the system: ①Modular bridge expansion device; , Modular comb plate type multi-directional displacement bridge telescopic device, etc. "Highway Bridge Expansion Dev...

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a telescopic device with a lower support platform, which aims to solve the problem that the rubber and waterproof rubber strips of the existing telescopic devices are easy to accumulate stones and sand, which in turn causes the waterproof rubber strip to squeeze and fall off.

Images