ZEY-type large-stroke bridge expansion device

Abstract

Provided is a ZEY-type large-stroke bridge expansion device. The ZEY-type large-stroke bridge expansion device is composed of figured steel boundary beams (1) on two edges, a goblet-shaped middle beam (3), waterstops (2), a displacement box (4), anchor plates and anchor steel bars. Double layers of waterstops (2) are connected between the figured steel boundary beams and the goblet-shaped middle beam. The figured steel boundary beams are in ZE types and arranged over the displacement box. The goblet-shaped middle beam is arranged on a spandrel girder (5) inside the displacement box, the upper portion and the lower portion of the spandrel girder are covered with stainless steel sliding plates (8), and sliding supports (6) slide up and down on the sliding plates. The width of the spandrel girder is larger than that of each sliding support. A limiting stop (7) for limiting transverse displacement of the spandrel girder is arranged on the displacement box. The ZEY-type large-stroke bridge expansion device is large in stroke, free from water leakage, high in overall strength, stable in structure and long in service life, and combination between the ZEY-type large-stroke bridge expansion device and bridge concrete is good.

Description

technical field [0001] The invention relates to a telescopic device for building a bridge, in particular to a telescopic device with a large telescopic amount of the bridge. Background technique [0002] In order to meet the deformation requirements of the bridge deck, expansion joints are usually set between the two girder ends of the bridge, between the girder end and the abutment, or at the hinge position of the bridge to meet the needs of thermal expansion and cold contraction of the bridge deck deformation. [0003] Existing bridge expansion joints with a large amount of expansion have the following disadvantages: 1. There is only a single-layer waterstop, which may be damaged during installation and use, resulting in water leakage, and long-term water leakage will cause damage to the bridge and the support. 2. The load-bearing beam of the sliding box is relatively narrow, and the limit sliding support of the narrow beam compresses the width, which will cause shear dama...

AI Technical Summary

Problems solved by technology

[0003] The existing large-scale expansion joints of bridges have the following disadvantages: 1. There is only a single-layer waterstop, which may be damaged during installation and use, resulting in water leakage, and long-term water leakage will cause damage to the bridge and the support

2. The load-bearing beam of the sliding box is relatively narrow, and the limit sliding support of the narrow beam pressure width will cause shear damage to the support and affect the life of the entire device

3. The above-mentioned load-bearing beam has no limit stopper, and the load-bearing beam falls off from the sliding support when the limit is exceeded and the telescopic device produces a corner, resulting in damage to the telescopic device

4. The angle steel for positioning the sliding support is not firmly supported, which may easily cause displacement and cause the sliding support to fall off, and also damage the telescopic device, affecting driving

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