Anti-clamping cross-seam comb-tooth type bridge expansion device

Abstract

The invention discloses an anti-clamping cross-seam comb-tooth type bridge expansion device, and solves a problem that wheels and stones are clamped by deep and long potholes of a traditional large comb-tooth type bridge expansion device. The fixed tooth pit slot filling and lifting method comprises steps that the tooth length is increased in the post-cast strip direction of the telescopic device, pit slots with certain lengths of adjacent teeth are covered, inter-tooth cavities with certain lengths corresponding to the models are formed, inter-tooth bearing beams with the corresponding lengths are vertically and movably connected to the corresponding tooth ends, the bearing beams have enough strength, during use, the size of the top surface of the full-pit slot long inner bearing beam is only about 15mm lower than that of the tooth top. According to comb tooth beam seam bolt side pit slot filling and lifting, two steel plates are welded to the movable tooth side through the I-shaped cross section of a fixed tooth side tooth beam, and a 20-25 mm gap needed by stretching and retracting of a fixed tooth I-shaped beam web is reserved. After treatment, a top surface of a pit slot on the movable tooth side is about 20mm lower than the road surface, so the conditions of wheel clamping and stone clamping are avoided.

Description

technical field [0001] The invention relates to bridge construction, in particular to an anti-blocking wheel / stone-blocking comb-tooth type bridge telescopic device. Background technique [0002] The bridge girder joint is a bridge building to adapt to the shrinkage and expansion setting. When the bridge deck is paved, it is necessary to set up waterproof and adaptable scalable pavement at the expansion joint. Dimensional change in shrinkage and expansion in the transverse direction. The currently widely used Maurer telescopic devices tend to accumulate dust and stones in the joints, and the car jumps obviously. The waterproof rubber is easy to detach and leak water. Due to the flexibility of the steel cover, in order to prevent the steel cover from arching, a sufficient expansion gap will be left at one end of the steel cover, but this will also result in no gaps in the road surface, resulting in bicycle wheel or stone jamming. Contents of the invention [0003] The tec...

AI Technical Summary

Problems solved by technology

At present, a large number of Maurer telescopic devices are used. Dust and stones are easy to accumulate in the joints, and the car jumps obviously. The waterproof rubber is easy to detach and leaks.

Due to the stretchability of the steel cover, in order to prevent the steel cover from arching, a sufficient expansion space will be left at one end of the steel cover, but it will also cause no gaps in the road surface, resulting in bicycle wheel or stone jams

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