Large bridge support base plate and connecting method thereof

Abstract

The invention relates to a large bridge support base plate and a connecting method thereof. The base plate is installed at the bottom of the steel beam bottom plate of a bridge and comprises a base plate body. Countersunk bolt holes are evenly formed in the middle area of the base plate body, and connecting weld joints welded and fixed to the steel beam bottom plate are arranged on the four sidesin the circumferential direction. The base plate body is installed at the bottom of the steel beam bottom plate in a matched mode through the countersunk bolt holes and countersunk bolts and is weldedand fixed to the bottom of the steel beam bottom plate through the connecting weld joints. The connecting method comprises the following steps: (1) controlling the connecting precision of the supportbase plate; (2) eliminating the welding stress of the support base plate; and (3) controlling the deformation of the support base plate. The problems existing in the prior art can be effectively solved, the mounting precision and stress safety of the ultra-large support base plate are guaranteed, the service life of a bridge is prolonged, and operation safety is improved.

Description

technical field [0001] The invention relates to the technical field of bridge manufacturing, in particular to a large-scale bridge support backing plate and a connection method thereof. Background technique [0002] The structure of the steel bridge bearing part is the most critical part of the bridge force and the most complex structure, and it is also one of the key parts of the bridge prone to disease. The connection between the backing plate of the steel bridge support and the steel bridge is mostly connected by fillet welds around the backing plate. For small and medium-sized bridges, the vertical load of the support is relatively small, and the size of the backing plate of the support is also small. This connection method It will not cause quality defects, but for large bridges with tens of thousands of tons of steel, the support can bear a vertical load of more than 10,000 tons. If the cantilever is used to erect, considering the counterweight and construction load, t...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems existing in the prior art that the support backing plate is deformed (bulging in the middle) and the stress after welding is relatively large, cracking of the connection weld may occur under the action of the vertical load and horizontal load of the bridge, which affects the safety of the bridge. The present invention Provided is a large bridge support backing plate and its connection method, which can effectively solve the problems existing in the prior art, ensure the installation accuracy and force safety of the super large support backing plate, and improve the service life and operation safety of the bridge

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