Large-span T-type steel structure segmental beam mounting and closing method for isle-connecting bridge

Abstract

The invention discloses a large-span T-type steel structure segmental beam mounting and closing method for an isle-connecting bridge. The method comprises the following steps that a, water tank balance weight systems are installed at the cantilever ends of adjacent T-type steel structure segmental beams respectively, and a bridge floor crane is preserved at the top of one segmental beam; b, a closure block is hoisted by the bridge floor crane, the plane position and elevation of the closure block are adjusted to be within the designed parameter standard, and the closure block is locked temporarily; c, jacking force is applied to the segmental beams on the two sides of a closure opening, the bridge profile of the closure block and the closure segment is adjusted, and finally the closure block is locked; d, wet joint vertical formwork pouring and closure strand stretching are completed. According to the method, mounting and closure of the large-span T-type steel structure beams with thespan above 150 m can be guided, the connecting stability and safety of the T-type steel structure segmental beams are effectively improved, investment of offshore large mounting equipment is reduced,the construction cost is reduced, the construction efficiency is improved, and the precision requirement of bridge closure mounting is met.

Description

technical field [0001] The invention relates to the technical field of bridge closing methods. More specifically, the present invention relates to a method for installing and closing long-span T-shaped steel structure segmental girders for the Liandao Bridge. Background technique [0002] The Liandao Bridge, also known as the cross-sea bridge, has been successively constructed in Changdao, Yantai and other places in my country. Compared with the traditional cable-stayed bridge, the Liandao Bridge needs higher safety and stability because it is located on the sea. The steel structure section The installation accuracy of girder bridges is relatively high, and the segmental beam closure method that plays a key role in the safety, stability and accuracy control of the bridge alignment of the Liandao Bridge, none of the patents and papers in the prior art proposes a systematic method. solution. Contents of the invention [0003] An object of the present invention is to provide ...

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Problems solved by technology

[0002] The Liandao Bridge, also known as the cross-sea bridge, has been successively constructed in Changdao, Yantai and other places in my country. Compared with the traditional cable-stayed bridge, the Liandao Bridge needs higher safety and stability because it is located on the sea. The steel structure segment The installation accuracy of girder bridges is relatively high, and the segmental beam closure method that plays a key role in the safety, stability and accuracy control of the bridge alignment of the Liandao Bridge, none of the patents and papers in the prior art proposes a systematic method. solution

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