Preforming and Erecting Construction Method of Main Cable Strands of Suspension Bridge

Abstract

The invention discloses a suspension bridge main cable strand performing and erection construction method, and aims to provide a suspension bridge main cable strand performing and erection construction method with high construction speed. The method includes the steps: first, performing a main cable strand; second, performing saddle entering construction for the formed main cable strand. Saddle entering construction particularly includes the steps: (1) strand traction; (2) strand lifting; (3) strand saddle entering. When a square section of the strand passes the main saddle and a splay saddle, a tin fish clamp in a square internal opening is used for crossing, torsion of the square section is decreased as far as possible, and deformation of the strand is avoided. The strand is lifted by a square strand lifting hook and a chain block and horizontally moves to the upper portion of a corresponding main saddle groove, and the lifting hooks can be knocked to return if the strand is twisted, so that torsion of the strand is corrected. The method breaks the limitation of a traditional saddle entering construction method, and can be popularized and applied in similar engineering.

Description

technical field [0001] The invention relates to the technical field of suspension bridge construction, in particular to a method for preforming and erecting main cable strands of a suspension bridge. Background technique [0002] Suspension bridge is a bridge whose main load-bearing components are cables or chain cables that bear tension. It is composed of suspension cables, cable towers, anchorages, suspenders, bridge deck systems, etc. It is the bridge type with the largest spanning capacity among bridges of various systems. At present, the bridge with the largest span in the world is the suspension bridge with a span of 1991m built in 1998-Japan Akashi Kaikyo Bridge. Since the 1990s, the construction of suspension bridges in my country has entered a period of rapid development. In 1995, the first long-span suspension bridge, the Shantou Bay Bridge, was built. The main span of Xihoumen Bridge opened to traffic in 2009 reached 1650m, ranking first in the world. Second, Chin...

AI Technical Summary

Problems solved by technology

The process of on-site shaping into the saddle is time-consuming, inefficient, difficult to guarantee safety and quality, and will damage the galvanized layer of the steel wire, which is not conducive to the long-term use and durability of the cable strands

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