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Accurate adjustment method for tower column stress of cable bent tower

A technology of precise adjustment and tower towers, applied in bridge parts, erection/assembly of bridges, wind power generation, etc., can solve the problems of cracking of concrete towers, unverifiable lifting effect, large lateral deviation of towers and towers, etc. To achieve the effect of improving efficiency and effectiveness

Active Publication Date: 2021-07-02
CHINA RAILWAY BRIDGE SCI RES INST LTD +2
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present application provides a precise adjustment method for the stress of the tower column of the cable tower to solve the problem that the jacking effect cannot be verified in the related technology, and the one-time jacking in place may cause the root of the tower column to be subjected to tensile stress, resulting in concrete The cracking of the tower column will affect the construction safety of the tower column, and may even cause the lateral deviation of the tower column to be too large, which will affect the verticality of the tower column

Method used

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  • Accurate adjustment method for tower column stress of cable bent tower
  • Accurate adjustment method for tower column stress of cable bent tower
  • Accurate adjustment method for tower column stress of cable bent tower

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Embodiment Construction

[0065] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0066] see figure 1 and figure 2 As shown, the embodiment of the present application provides a method for accurately adjusting the stress of the tower column, which includes the following steps:

[0067] S1: Obtain the target lifting force P of the cross brace 1, the target stress σ at the bottom of the tower column 2, and the targe...

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Abstract

The invention relates to the field of bridge construction, in particular to an accurate adjustment method for tower column stress of cable bent tower. The method comprises the following steps: acquiring a target jacking force P of a cross bracing, a target stress sigma of the bottom end of a tower column and a target transverse deviation f of the tower column; acquiring a stress threshold value and a transverse deviation threshold value according to sigma and f; determining the planned jacking times n and the set jacking force of each time of transverse support jacking, wherein the set jacking force meets the condition that the set jacking force of the ith jacking is the sum of the incremental jacking force distributed by the ith jacking and the set jacking force of the (i-1) th jacking; jacking the tower column for the first time; acquiring the actual stress sigma actual of the bottom end of the tower column and the actual transverse deviation f actual of the tower column; judging whether the actual sigma exceeds a stress threshold value or not and whether the actual f exceeds a transverse deviation threshold value or not; if the actual sigma does not exceed the threshold value of the stress and the actual f does not exceed the threshold value of the transverse deviation, continuing the next jacking, and acquiring the actual sigma and the actual f again; and otherwise, locking the cross bracing. The invention avoids the problems that: the tower column cracks and the perpendicularity of the tower column is affected due to one-time jacking.

Description

technical field [0001] The application relates to the field of bridge construction, in particular to a method for accurately adjusting the stress of a tower column. Background technique [0002] At present, the cross-bridge form of the cable tower of the cable-stayed bridge often adopts A shape, inverted Y shape, pagoda type, diamond type, etc.; Shape or polygon; in order to facilitate and rapid construction, the tower column is generally divided into multiple sections vertically, and constructed section by section. During the construction process, the constructed sections mainly rely on the self-weight of the structure and the construction load. When the tower column of the cable tower is tilted in the direction of the bridge, the main tower will bear the eccentric load caused by the self-weight of the tower column and the construction load; when the construction reaches a certain height, the concrete outside the root of the tower column will have tensile stress, when the t...

Claims

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Application Information

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IPC IPC(8): E01D19/16E01D21/00
CPCE01D19/16E01D21/00Y02E10/728
Inventor 罗力军蔡正东李翀崔军李卫东郭松郭存伟朱凡凡曹明明谢国武王克兵李苏洋阮希贤肖贵凯
Owner CHINA RAILWAY BRIDGE SCI RES INST LTD
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