A method for lateral tensioning of a cable system with a space cable-plane structure

A horizontal and spatial technology, applied in bridge parts, erection/assembly of bridges, bridges, etc., can solve the problem of lack of a mature and reliable construction method, and achieve the effect of reducing the difficulty of construction management, ensuring project quality, and simple tooling structure

Active Publication Date: 2017-11-14
中建桥梁有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to previous construction experience, after the main cable is tightened, the hoist and jack are used to pull the free-sagging main cable horizontally in the middle of the span. However, the construction process has been in the process of exploration, and there is no mature and reliable construction method.

Method used

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  • A method for lateral tensioning of a cable system with a space cable-plane structure

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Embodiment 1

[0025] (1) After the main cable tightening of the space cable surface structure suspension bridge is completed, the main cable clamps are installed on the two main cables respectively;

[0026] (2) According to the BNLAS computer structure calculation software, the number of horizontal pairings required for the transformation of the main cable space system is 3, and one transverse pairing is arranged at 1 / 4, 1 / 2, and 3 / 4 of the main span of the suspension bridge. device.

[0027] (3) Hang the catwalk on the two main cables so that the catwalk moves laterally with the two main cables;

[0028] (4) According to the position of the horizontal pull set in step (2), install the horizontal pull device on the catwalk. -2 Connect multiple pairs of main cable pull bases 2 with the main cable clips on the two main cables 1 respectively; Two main cable pull seats 2, each main cable pull seat 2 respectively includes a seat body, symmetrically opened in the middle of the upper part and t...

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Abstract

The invention discloses a transverse opposite pulling method for a space cable plane structure cable system. The method comprises the following steps that (1) after tightening of main cables of a space cable plane structure suspension bridge is completed, main cable clamps are mounted on the two main cables correspondingly; (2) the number and positions of transverse oppositely-pulled cables required for main cable space system transformation are simulated according to computer structural calculation software; (3) a catwalk is reversely suspended on the two main cables so as to move transversely along with the two main cables; (4) according to the positions, set in the step (2), of transverse opposite pulling devices, the transverse opposite pulling devices are mounted on the catwalk; (5) jacks are used for tensioning steel strand harnesses, tensioning force of the jacks is transmitted into transverse opposite pulling acting force of the main cables, the steel strand harnesses are fixed through anchoring devices after the two main cables arrive at the designed positions, and transverse opposite pulling construction of the main cables is completed after the space line shape conforming to the main cables is measured; and (6) a steel wire rope is wound around the two main cables to fix the two main cables in the midspan position of a main span. By means of the method, the line shape of the main cables is approximate to a state line shape of a finished bridge.

Description

technical field [0001] The invention relates to a method for transversely parallel pulling, in particular to a method for transversely parallel pulling of a cable system with a space cable surface structure. Background technique [0002] With the development of suspension bridge construction technology, ground-anchored suspension bridges are more popular in the selection process of long-span bridges across canyons and rivers. The cable system of ordinary suspension bridges adopts vertical curves, which is not suitable for the higher aesthetic requirements for the appearance of urban bridges and scenic bridges. The structural form of the cable system with space cable plane structure is not only novel in structure, but also improves the wind resistance and stability of the bridge itself, and has been selected by many famous bridge designs. Because the main cable is in a free-sagging plane alignment during the construction process of the space cable-surface structure of long-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D19/16
CPCE01D19/16E01D21/00
Inventor 马亮屈喜庆郭坤陈平王刚
Owner 中建桥梁有限公司
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