Steel truss girder assembling, erecting and construction process

Abstract

The invention discloses a steel truss girder assembling, erecting and construction process. A steel truss girder is a girder body, the front end and the rear end of an erected steel truss girder are supported on a first permanent buttress and a second permanent buttress respectively, the steel truss girder is formed by splicing a plurality of steel truss girder segments in an end-to-end mode, and the first permanent buttress and the second permanent buttress are located on the two sides of a main riverway of a river respectively. Assembling and erecting of the steel truss girder include the first step of construction of temporary supporting systems, longitudinal sliding rails and transverse sliding rails, the second step of assembling, erecting and longitudinal moving of the steel truss girder at different times, the third step of transverse moving of the steel truss girder and the fourth step of setting of the girder, wherein in the first step, the temporary supporting systems are constructed on one side of the first permanent buttress and on one side of the second permanent buttress respectively, the two longitudinal sliding rails used for the steel truss girder to move longitudinally and the two transverse sliding rails used for the steel truss girder to move transversely are distributed on the temporary supporting systems; in the second step, the steel truss girder segments are assembled more than once from front to back and are longitudinally moved many times. The steel truss girder assembling, erecting and construction process is simple in process, reasonable in design, convenient to achieve, good in construction effect and little in construction difficulty, and the assembling and erecting processes of the steel truss girder can be conveniently and quickly achieved.

Description

technical field [0001] The invention belongs to the technical field of assembly and erection of steel truss girders, and in particular relates to a construction process of assembly and erection of steel truss girders. Background technique [0002] The second line of the new Yellow River Super Bridge is located at the junction of Hancheng City, Shaanxi Province and Hejin City, Shanxi Province. The central railway mileage of the bridge is DK78+481, parallel to the existing About 22m downstream of the steel truss girder of the Yellow River Bridge on the Houxi Line Railway. The steel truss girder plane with a small mileage of 12m is located on the R=600m transition curve, the rest is located on a straight line, and the facade is 0% longitudinal slope. Among them, the fourth span uses a 156m-long under-supported steel truss girder to cross the main channel of the Yellow River. The steel truss structure has a self-weight of 13.74t / m and a total weight of 2173t. The maximum weig...

AI Technical Summary

Problems solved by technology

In addition, due to the complex engineering geology and hydroclimatic conditions at the bayonet of the Yellow River, the construction process of steel truss girder assembly erection is affected by rapid water flow, large changes in river bed scour, high wind speed, flood season and lingering season. and difficult construction

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