Mutual-pulling type vertical turning construction method for steel towers of cable-stayed bridge

Abstract

The invention relates to a mutual-pulling type vertical turning construction method for steel towers of a cable-stayed bridge. The mutual-pulling type vertical turning construction method includes that bridge deck is used as a welding construction platform to finish welding operation of the steel towers on the left side and the right side, and the steel towers on the two sides respectively horizontally move in place; draw bars and press bars are respectively mounted on the steel towers on the two sides so as to form triangular supports; a flexible bearing steel stand penetrates into a rotating cylinder, and is connected to the top ends of the triangular supports on the two sides; and hydraulic synchronous lifting technology is controlled by a computer, the steel tower on the right side is used as a support at first, the steel tower on the left side vertically turns, then the steel tower on the left side is used as a support after turning, and the steel tower on the right side turns vertically. The mutual-pulling type vertical turning construction method for the steel towers of the cable-stayed bridge can avoid high-altitude welding operation of the steel towers of the bridge, the quality of weld joints is controlled more easily, safety of construction operation is improved, construction cost is reduced, and construction efficiency is improved. A computer control system is simple in operation and easy in control, and an operation process is safe and reliable.

Description

technical field [0001] The invention relates to a construction method for a steel tower of a large bridge, in particular to a construction method for a steel tower of a cable-stayed bridge with mutual pull-type vertical rotation. Background technique [0002] With the continuous development of our country's economy, there are more and more construction projects of long-span bridges. At present, for the installation of bridge steel towers, the method of vertical assembly is usually used for construction, that is, by erecting scaffolding and supporting platforms, and using large-tonnage tower cranes or cranes to assemble segment by segment. This construction technique has the following disadvantages: 1) high-altitude operation is very dangerous; 2) it is difficult to guarantee the spatial welding quality of the steel tower; 3) it is difficult to control the spatial installation accuracy of the steel tower. [0003] In order to ensure the quality of steel tower positioning wel...

AI Technical Summary

Problems solved by technology

The construction technology has the following disadvantages: 1) high-altitude operations are dangerous; 2) the quality of the steel tower's spatial welding is difficult to guarantee; 3) the spatial installation accuracy of the steel tower is difficult to control

This construction process is easy to cause stress and deformation of the steel girder deck

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