Walking type pushing construction method for segmental assembled steel box girder on overpass busy highway

Abstract

The invention discloses a walking type pushing construction method for a segmental assembled steel box girder on overpass busy highway, which comprises the the following steps: step 1, a 260-ton crawler crane enters a field, an assembling bracket a-b and a pushing bracket a-c are installed, 75-ton truck cranes are used for respectively assembling the segments 1#-4# of the steel girder into a wholeon the ground, the steel girder segments and nose girders are hoisted in place by using the 260-ton crawler crane; and step 2, a pushing bracket d is constructed, the steel nose girder and the segments 1#-4# of the steel girder are pushed forwards by 13.5 m, and then a segment 5# is hoisted at the tail end of the bracket by utilizing the 260-ton crawler crane. The construction method has the advantages that the requirements of owners for the construction period are met, the construction cost is saved, and the problems that in the construction process of walking type pushing of the segmental assembled steel box girder, the construction difficulty is large due to the problems that the intersection angle of roads is small, the site is narrow, and transportation is difficult, traffic of highway vehicles is hindered in the construction process, the construction efficiency is reduced, and the construction cost is increased are solved.

Description

technical field [0001] The invention relates to the technical field of walking-type jacking construction of assembled steel box girders, in particular to a walking-type jacking construction method for assembling steel box girders on busy high-speed sections. Background technique [0002] Steel box girder, also known as steel plate box girder, is a common structural form of long-span bridges. It is generally used on bridges with large spans. It is called steel box girder because it looks like a box. , web, and transverse diaphragm, medial diaphragm and stiffeners are connected by full welding, and the roof is an orthotropic bridge deck composed of cover plate and longitudinal stiffeners. [0003] During the construction process, the walking-type jacking of high-speed segmental assembled steel box girders is difficult due to the small road intersection angle, narrow site and difficult transportation. During the construction process, it will hinder the passage of expressway veh...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a walking-type jacking construction method for assembling steel box girders on busy high-speed sections, which overcomes the problems of small road intersection angles, variable curve steel box girders, narrow sites, and transportation difficulties, ensuring that the project The quality and construction safety greatly reduce the impact on the opening of busy expressways, reduce the difficulty of construction, speed up the construction progress, meet the requirements of the owner for the construction period, save the construction cost, and solve the problem of high-speed section assembly of steel box girders. During the construction process, due to the small road intersection angle, small site and difficult transportation, the construction is difficult, which will hinder the passage of expressway vehicles during the construction process, reduce the low construction efficiency and increase the construction cost.

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