Composite back-cable-free cable-stayed bridge and construction method thereof

Abstract

The invention discloses a composite back-cable-free cable-stayed bridge. The cable-stayed bridge comprises a steel structure main beam, a steel structure stress main tower, a steel structure stress auxiliary tower, a bridge pier structure and a bridge abutment structure, the steel structure stress main tower and the steel structure stress auxiliary tower are sequentially arranged on the steel structure main beam in the bridge direction, and the bridge pier structure and the bridge abutment structure are arranged at the bottom of the steel structure main beam; and a main tower stay cable is connected between the steel structure stress main tower and the steel structure main beam, an auxiliary tower stay cable is connected between the steel structure stress auxiliary tower and the steel structure main beam, a main tower micro-expansion concrete pouring section is poured into the steel structure stress main tower, and an auxiliary tower micro-expansion concrete pouring section is poured into the steel structure stress auxiliary tower. The cable-stayed bridge can meet the use requirement for long-term service; and the landscape performance is good, the construction risk is low, and economical efficiency is good.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a composite non-back cable-stayed bridge and a construction method thereof. Background technique [0002] In urban bridge construction and transportation, bridge design no longer simply pursues economy and practicality, but begins to pursue the bridge landscape effect of "one bridge, one scene". Among them, the cable-stayed bridge is a bridge type with strong spanning ability and good landscape, and it is constantly used in urban bridges. In recent years, with the rapid development of my country's bridge industry, various bridge types of cable-stayed bridges have emerged in an endless stream, and the requirements for bridge shape design to gradually conform to aesthetics have become increasingly strong. [0003] Conventional pylons of cable-stayed bridges without back cables rely on the self-weight of the pylon, so each section of the pylon must correspond to the hori...

AI Technical Summary

Problems solved by technology

Conventional cable-stayed bridges without back cables often choose a relatively bloated bridge tower, and the size of the main girder is also large. In terms of height, it is impossible to take into account whether the ratio of tower height to span is coordinated, which loses the inherent strength of the structure.

Especially when the main girder adopts steel structure, the light steel structure main girder reduces the construction difficulty of the bridge tower; the bridge tower is inclined at a certain angle, although the cable force can be balanced by the self-weight of the tower body; but the weight requirement of the tower body also determines the body size will be larger

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