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A control method for main tower deflection error of suspension bridge

An error control and suspension bridge technology, applied in suspension bridges, bridges, bridge construction, etc., can solve the problems of large deviation error at the top of the tower, uneven distribution of compressive stress at the bottom of the tower, and affecting the normal use of the bridge, so as to ensure the construction quality.

Active Publication Date: 2022-05-20
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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Problems solved by technology

As the main pressure-bearing component of the main tower, a large deviation error at the top of the tower will not only lead to uneven distribution of compressive stress at the bottom of the tower, reduce the safety reserve of compressive stress of the main tower, but also reduce the stability of the main tower, even under extreme load conditions. Affect the normal use of the bridge

Method used

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  • A control method for main tower deflection error of suspension bridge
  • A control method for main tower deflection error of suspension bridge
  • A control method for main tower deflection error of suspension bridge

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Embodiment Construction

[0021] Cause analysis: Since the design of the catwalk construction platform and main cable of the suspension bridge is calculated using the catenary theory, the horizontal force at the top of the tower is equal, so the main tower will not be damaged during the erection of the catwalk construction platform and main cable. Misalignment occurs. When the main cable saddle is installed, the pre-deflection amount is set at the top of the tower in advance. When the hoisting of the stiffening beam and the subsequent phase II dead load construction cause the main tower to deviate, the main tower is reset by pushing. Theoretically speaking, the erection of the catwalk construction platform, the erection of the main cable, the hoisting of the stiffening beam and the subsequent phase II dead load construction will not cause the main tower to produce deviation errors.

[0022] Before the stiffening beam hoisting construction, in order to adapt to the large displacement and deformation of ...

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Abstract

The invention discloses a method for controlling the deviation error of the main tower of a suspension bridge, which belongs to the technical field of bridge construction. Under the joint action of road load, cable-loaded crane load and counterweight load, the unbalanced horizontal force at the top of the tower is F=0, and the deviation error of the main tower is ΔL=0. After the bridge is completed, the counterweight, cable-loaded crane and catwalk to dismantle. By adopting the control method of the invention, the deviation error of the main tower in the state of bridge completion can be controlled, and the construction quality of the bridge can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a method for controlling the deviation error of a main tower of a suspension bridge. Background technique [0002] At present, the construction control of suspension bridges focuses on the stress-free manufacturing length of main cables and suspension cables, and the alignment of main cables and girders, and less attention is paid to the alignment of main towers. Big. As the main pressure-bearing component of the main tower, a large deviation error at the top of the tower will not only lead to uneven distribution of compressive stress at the bottom of the tower, reduce the safety reserve of compressive stress of the main tower, but also reduce the stability of the main tower, even under extreme load conditions. affect the normal use of the bridge. Therefore, there is an urgent need to provide a method for controlling the deviation error of the main tower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D19/14E01D11/02
CPCE01D21/00E01D19/14E01D11/02
Inventor 熊邵辉陈斌刘海明王焱钱锋程军委郜朝军胡鑫垠
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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