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Mid-span closure method for steel box girders of cable-stayed bridge

A technology for steel box girder and cable-stayed bridge, which is applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of high precision requirement of the closing section, high construction risk of closing and cumbersome locking operation, etc. The effect of high precision and easy operation

Pending Publication Date: 2021-07-13
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a mid-span closing method for steel box girders of cable-stayed bridges, so as to solve the problems of high precision requirements for cutting the closing section, high risk of closing construction, cumbersome locking operation, and low efficiency.

Method used

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  • Mid-span closure method for steel box girders of cable-stayed bridge
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  • Mid-span closure method for steel box girders of cable-stayed bridge

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Embodiment Construction

[0047] The technical solutions in the present invention are clearly and completely described below in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] A method for closing the middle span of a steel box girder of a cable-stayed bridge provided in this embodiment comprises the following steps:

[0049] 1. Determination and manufacture of steel box girder 16 in Helong section

[0050] figure 1 It shows the structural diagram of the temperature monitoring before the closing. The installed cantilever steel box girders (that is, the steel box girder 14 on the push side and the steel box girder 15 on the non-push side) are ...

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Abstract

The invention discloses a mid-span closure method for steel box girders of a cable-stayed bridge, which adopts a single-side crane to hoist a closure section steel box girder and a single tower for pushing, avoids the problem of synchronism of construction on two sides, adopts a pushing device for locking, does not need to weld a stiff skeleton and does not need to carry out balance weight in advance. The closure section steel box girder is placed on the girder tops of the cantilever steel box girders installed on the two sides in a simple support mode, the whole closure construction process is short in duration time, easy and convenient to operate, capable of saving resources and low in construction risk, various closure error adjusting methods are embodied, and high closure precision is ensured.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a mid-span closing method for a steel box girder of a cable-stayed bridge. Background technique [0002] The closing of the cable-stayed bridge is a symbol of the completion of its main structure construction, and it is the most critical and technical component in the construction of the cable-stayed bridge. As far as the current construction technology is concerned, the closing construction of steel girder cable-stayed bridges generally adopts the temperature matching and cutting method and the jacking method. In the temperature matching and cutting method, the closing temperature is predicted according to the closing time, and the closing gap at the closing temperature is determined after temperature monitoring, and then the steel beam of the closing section is cut. However, the steel beam will expand and contract due to temperature changes, and the closi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D21/06
CPCE01D21/00E01D21/06
Inventor 陈常松凌李华颜东煌王金黄茛佘勤聪
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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