Suspender tensioning method of double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable

A sling, single-span technology, applied in the direction of suspension bridges, bridges, bridge forms, etc., can solve the problems of time-consuming, affecting the construction period, insecurity, etc., and achieve the effect of avoiding the difficulty of loosening and changing safety.

Inactive Publication Date: 2011-04-20
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 problem that temporary cable loosening is difficult, unsafe, time-consuming and affects the construction period in the system conversion of the main cable self-anchored suspension bridge with double towers, single-span and large transverse inclination angle in space with parallel steel wires, the pr

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  • Suspender tensioning method of double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable
  • Suspender tensioning method of double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable
  • Suspender tensioning method of double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable

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Embodiment Construction

[0019] see figure 1 , 2 , 3, figure 1 It is a bridge type layout diagram of the double-tower single-span large transverse inclination space main cable self-anchored suspension bridge in the present invention. figure 2 It is a structural diagram of the cable anchor fixing system of the double-tower single-span large transverse inclination space main cable self-anchored suspension bridge of the present invention. image 3 It is a schematic diagram of the suspension cable tensioning steps of the self-anchored suspension bridge system conversion of the double-tower single-span large transverse inclination space main cable of the present invention.

[0020] In the figure, 1 is the main tower; 2 is the main cable; 3 is the permanent sling; 4 is the sling; 5 is the main saddle; 6 is the main span; 7 is the side span; 8 is the temporary pier; 9 is the steel box girder ; 10 is a sling anchor conduit; 11 is a sling anchor backing plate; 12 is a sling anchor nut, and 13 is a temporar...

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Abstract

The invention discloses a suspender tensioning method of a double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable, which comprises the following steps: expanding a main cable to a certain degree by using temporary slings; tensioning permanent slings nearby the temporary slings to a preset tonnage or an unstressed sling length at the time forming a bridge in the process of tensioning the permanent slings; and stopping a part of the temporary slings or all temporary slings working by using the advantage that the allowable cable tension of the permanent slings are much greater than that of the temporary slings, thus ensuring that the cable tension of the temporary slings does not exceed the specified value. In the process, if the derivation of a tower top exceeds the limit, the main cable saddles are subject to incremental launching. In the suspender tensioning method of the double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable, the larger control cable tension of the permanent slings nearby the temporary slings is taken full advantage. The suspender tensioning method of the double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable has the following advantages of being in no need of regulating the cable tension of the temporary slings actively in the process of system conversion, thus ensuring safety in the construction process, and quickness and convenience, short construction period, and lower cost.

Description

technical field [0001] The invention relates to a construction method of a suspension bridge, in particular to a method for tensioning suspension cables of a double-tower single-span large transverse inclination space main cable self-anchored suspension bridge. Background technique [0002] The self-anchored suspension bridge does not need to build bulky anchorages, has low requirements on geological conditions, flexible span layout, and good landscape effects. As for the space main cable self-anchored suspension bridge, since the suspension cable of the transverse bridge tilts the main cable to a certain extent, both the suspension cable and the main cable have a direction-retaining force, so it has strong wind resistance and excellent dynamic performance. more attention. So far, there are more than ten space main cable self-anchored suspension bridges that have been built or are under construction, such as South Korea Yeongjong Bridge, San Francisco New Oakland Bay Bridge...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D11/02
Inventor 李传习柯红军董创文张玉平
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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