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A Precise Adjustment Method of Tower Column Stress

A technology of precise adjustment and tower tower, which is applied in the field of precise adjustment of tower column stress, can solve problems such as cracking of concrete tower columns, affecting the safety of tower column construction, affecting the verticality of tower columns, etc., and achieves the goal of improving efficiency and effect Effect

Active Publication Date: 2022-05-17
CHINA RAILWAY BRIDGE SCI RES INST LTD +2
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  • Abstract
  • Description
  • Claims
  • 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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  • A Precise Adjustment Method of Tower Column Stress
  • A Precise Adjustment Method of Tower Column Stress
  • A Precise Adjustment Method of Tower Column Stress

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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

This application relates to a precise adjustment method for the stress of the tower column of a cable tower, which relates to the field of bridge construction, and includes the following steps: obtaining the target lifting force P of the cross brace, the target stress σ at the bottom of the tower column, and the target lateral displacement of the tower column f; According to σ and f, obtain the threshold value of stress and the threshold value of lateral deviation; determine the number of planned jacking n, and the set jacking force of each cross-brace jacking, and the set jacking force satisfies: the i-th jacking The set jacking force is the sum of the incremental jacking force allocated for the i-th jacking and the set jacking force of the i-1th jacking; carry out the first jacking of the tower column; obtain the actual stress at the bottom of the tower column σ 实际 , and the actual lateral deflection f of the column 实际 ; Judgment σ 实际 Whether the threshold of stress is exceeded, and f 实际 Whether it exceeds the threshold of lateral displacement; if σ 实际 The threshold value of the stress is not exceeded, and f 实际 If the threshold of lateral deviation is not exceeded, continue to the next jacking up and obtain σ again 实际 and f 实际 ; otherwise, the brace is locked. Avoid the problems of cracking of the tower column and affecting the verticality of the tower column during 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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Patent Type & Authority Patents(China)
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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