Mal-position assembly in-position method of truss bridge

Abstract

The invention relates a mal-position assembly in-position method of a truss bridge. The method comprises the steps of building an assembly platform: excavating a roadway at a bridge abutment to form a work platform or erecting a steel tube bracket platform in the middle of a bridge, and arranging a girder assembling platform in the middle of a work platform or a bracket platform; firstly assembling the truss bridge: firstly assembling the truss bridge on an assembly platform, longitudinally moving the truss bridge to empty the space of the assembly platform part; assembling the truss bridge for the second time, the longitudinally moving the truss bridge to empty the space of the assembly platform part; repeating the steps to assemble the truss bride for the third time, the fourth time and the like and putting the truss bridge in position, taking width of the assembly platform as the limit, rotating the whole truss bridge by an angle to be in position, or longitudinally positioning or horizontally positioning. According to the mal-position method of the truss bridge, the technical difficulty that the truss bridge is difficult to be in position by one step when a high-pier truss bridge is erected at a complex terrain area, the operation is simple and convenient, the truss bridge assembling efficiency is high, and the alignment is accurate.

Description

technical field [0001] The invention relates to a bridge installation method, in particular to a method for assembling and placing truss girders of curved bridges in different positions. Background technique [0002] At present, in bridge engineering, the out-of-position assembly of truss girders is generally carried out by direct hoisting in place. The specific method is to level the site near the installation span as an assembly platform, and place the main beams to be hoisted on the assembly platform. After the beam assembly is completed, two cranes are used for direct hoisting, or after the out-of-position assembly is completed, it is transported to the site for direct hoisting. These two methods have high requirements on the terrain. When the environmental conditions of the project site are harsh, the terrain is complex, and the bridge type is curved, sloped, or inclined, it is difficult to achieve a flat site for assembling the truss beam near the bridge span, and it i...

AI Technical Summary

Problems solved by technology

These two methods have high requirements on the terrain. When the environmental conditions of the project site are harsh, the terrain is complex, and the bridge type is curved, sloped, or inclined, it is difficult to achieve a flat site for assembling the truss beam near the bridge span, and it is also difficult to assemble the truss beam on the site. It is often difficult to assemble the truss girders in one step during the erection process, and the existing technology is difficult to meet the construction of high-pier truss girders under the complex terrain conditions in mountainous areas.

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