A bridge expansion joint and its construction technology

Abstract

The invention discloses a bridge expansion joint, which comprises embedded steel bars, an expansion joint, an installing groove, a laying layer and an elastic material layer. The construction process comprises the following steps that according to construction requirements and bridge expansion joint specifications, the concrete bridge deck is subjected to joint cutting treatment; the steel bar embedding work of the bridge expansion joint is performed; the fixation is performed after the regulation; the steel bar embedding welding work is performed when no bias is ensured; a waterproof film is laid and padded in the expansion joint; a separation interface layer is brushed and coated on the waterproof film; then, the concrete casting work of the laying layer starts; after the casting work is completed for 48h, a waterproof membrane laid in the expansion joint is taken out; water closing inspection and delivery-receiving acceptance are performed; after the qualification, the construction of the bridge expansion joint is completed. The bridge expansion joint provided by the invention has the advantages that good driving comfort and durability are realized; the application range is wide; the construction process is simple; the cost is low; the construction quality is high; the long-time work life of the bridge expansion joint is ensured.

Description

technical field [0001] The invention relates to the technical field of bridge expansion joints, in particular to a bridge expansion joint and a construction process thereof. Background technique [0002] Bridge expansion joints refer to expansion joints usually set between two girder ends, between girder ends and abutments, or at the hinged position of the bridge in order to meet the deformation requirements of the bridge deck. It is required that the expansion joints can freely expand and contract in two directions parallel to and perpendicular to the bridge axis, and are firm and reliable. The vehicles should run smoothly without sudden jumps and noises; they should be able to prevent rainwater and garbage from infiltrating and blocking; installation, inspection, and maintenance , Elimination of dirt should be simple and convenient. Where expansion joints are set, railings and bridge deck pavement must be disconnected. Expansion joints are an important part of bridge con...

AI Technical Summary

Problems solved by technology

The traditional construction method of bridge expansion joints uses foam boards to ensure that the poured concrete does not leak. The construction efficiency is low and the cost is high. The method of directly pouring elastic materials to protect the bridge cannot make the interface between the pouring elastic body and the bridge very good. In combination, the long working life of bridge expansion joints cannot be guaranteed

Patent application number 201310189977.8 proposes a pouring method of elastic waterproof material for bridge expansion joints. Anti-adhesive plastic bags are used as the bottom liner, which are first inflated and filled. After the pouring material is solidified, the pouring work is completed by deflation and removal of the bag, effectively reducing However, the anti-adhesive plastic bag proposed by this method will have a certain volume after inflation, and there will be a gap between the bridge and the poured elastic material after deflation, and the combination of the poured elastic body and the bridge interface cannot be realized. , and the inflated plastic bag is easy to explode, with a limited service life, and the blasted adhesive tape may cause construction failure