Method for stretching single-tower double-span self-anchored suspension bridge sling of side-span splay cable knot in supportless way

A self-anchored suspension bridge and no support technology, which is applied to suspension bridges, bridges, bridge parts, etc., to achieve the effects of cost saving, high safety factor and large cable force

Inactive Publication Date: 2010-09-22
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems existing in the existing self-anchored suspension bridge suspension cable tensioning method, the present invention provides a self-anchored single-tower double-span self-anchored without additional temporary facilities, high safety factor, fast and convenient side-span loose cable sleeves Suspension bridge tensioning method

Method used

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  • Method for stretching single-tower double-span self-anchored suspension bridge sling of side-span splay cable knot in supportless way
  • Method for stretching single-tower double-span self-anchored suspension bridge sling of side-span splay cable knot in supportless way
  • Method for stretching single-tower double-span self-anchored suspension bridge sling of side-span splay cable knot in supportless way

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Embodiment Construction

[0018] see figure 1 , 2 , 3, figure 1 It is a bridge type layout diagram of the single-tower double-span self-anchored suspension bridge in the present invention. figure 2 It is a section elevation view of a side-span loose-cable cover section of a single-tower double-span self-anchored suspension bridge without support in the side-span loose-cable cover in the present invention. image 3 It is a structural diagram of the sling anchor fixing system of the present invention. In the figure, 1 is the main tower; 2 is the main cable; 3 is the sling; 4 is the side span side loose cable sleeve; 5 is the main span side loose cable saddle; 6 is the main span; 7 is the side span; 8 is the side of the main span Anchor span; 9 is the side anchor span; 10 is the temporary pier; 11 is the center of the front anchor surface; 12 is the center of the rear anchor surface; 13 is the steel-concrete junction; 14 is the support center line; 16 is a steel box girder; 17 is a sling steel anchor...

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Abstract

The invention discloses a method for stretching a single-tower double-span self-anchored suspension bridge sling of a side-span splay cable knot in a supportless way. The method is characterized by comprising the following steps of: alternately stretching slings at lateral span sides when a main-span sling is gradually stretched from a main tower to a splay cable saddle at a main tower side; firstly stretching a BK-M sling close to a splay cable knot at a lateral span side; then, sequentially and gradually stretching to the side-span splay cable knot; and sequentially and gradually stretching from the BK-M sling to the main tower and upwards pushing a main cable saddle if the deviation of a tower top exceeds a limit in the process. In the method, the characteristic of greater control sling force of a permanent sling close to the side-span splay cable knot is utilized, the vertical displacement of the splay cable knot can be basically controlled after the permanent sling is stretched, the sling force has little increment at a later period, and the whole quantity satisfies the safety requirement. The invention has the advantages of high safety factor, rapidness, convenience, cost saving by saving temporarily fixing facilities, such as a splay cable knot or a temporary sling, and the like.

Description

technical field [0001] The invention relates to a suspension cable tensioning method of a single-tower double-span self-anchored suspension bridge with side-span loose cable sleeves without support. Background technique [0002] Self-anchored suspension bridges do not need to build bulky anchorages, have low requirements on geological conditions, flexible span layout, and good landscape effects, while self-anchored suspension bridges with space main cables have strong wind resistance and excellent dynamic performance, so they are becoming more and more popular. be valued. So far, more than 20 self-anchored suspension bridges have been built or are under construction, such as Pingsheng Bridge in Foshan, Yeongjong Bridge in South Korea, New Oakland Bay Bridge in San Francisco, Liede Bridge in Guangzhou, Jiangdong Bridge in Hangzhou, Fumin Bridge in Tianjin, Qingdao Bay Bridge, Dagu River Channel Bridge, etc. Self-anchored suspension bridges can be divided into single-tower s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/10E01D11/02
Inventor 李传习柯红军董创文张玉平
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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