Asymmetric fabricated steel cable-stayed bridge and erecting method

Abstract

The invention relates to an asymmetric fabricated steel cable-stayed bridge and an erecting method and overcomes the defect that erecting difficulty is increased caused by the fact that a large erecting site is needed due to length increase and weight increase of a main beam as length of a land span is equal to that of a river span in the prior art. The asymmetric fabricated steel cable-stayed bridge comprises a main beam and a main tower connected on the main beam, the main beam is divided into a river span and a land span which are connected horizontally through a tower beam consolidation truss to form a consolidation system, the main tower is connected on the tower beam consolidation truss and inclines to one side of the land span, length of the land span is smaller than that of the river span, river stay cables are connected between the top of the main tower and the end of the river span, and land stay cables are connected between the top of the main tower and the end of the land span. The main tower inclines relative to the main beam, so that the length of the land span is shortened, length of the whole main beam is shortened, requirements on sites during erecting are lowered,and erecting difficulty is lowered.

Description

technical field [0001] The invention relates to a bridge structure, in particular to an asymmetric assembled steel cable-stayed bridge and its erection method. Background technique [0002] The prefabricated highway steel bridge is a standard bridge that can be disassembled and can be erected quickly. be widely used. Especially at the critical juncture of emergency rescue and when time becomes the key factor, the prefabricated highway steel bridge plays a very important role. [0003] With the rapid development of my country's highway construction, especially the comprehensive construction of national expressways, long-span (single-span ≥ 70m) highway bridges are becoming more and more popular. These bridges will be damaged due to natural disasters such as earthquakes, flash floods, mudslides, or people's daily traffic activities, resulting in traffic interruption. In order to ensure the normal progress of social order, we need to take measures to ensure the smooth flow o...

AI Technical Summary

Problems solved by technology

[0008] The present invention solves the problem of the existing assembled highway steel bridge, the main girder and the main tower are vertical structures, and the length of the land span is equal to the length of the suspended river span, resulting in an increase in the length and weight of the main girder, which requires a larger erection site and increases To overcome the defect of difficulty in erection, an asymmetric assembled steel cable-stayed bridge and its erection method are provided, the angle between the main tower and the main girder is changed, and the weight of the main tower is used to shorten the length of the land span and the overall length of the main girder length, thereby reducing the site requirements for erection, and also reducing the difficulty of erection

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