A temporary pier support method for a long-span steel-concrete composite girder cable-stayed bridge

Abstract

The invention discloses a temporary pier support method for a long-span steel-concrete composite girder cable-stayed bridge, comprising the steps of: 1. determining the temporary pier support position; 2. setting boundary constraint conditions; 1. Determine the timing of temporary pier demolition; 5. Set up temporary pier. The present invention determines the optimal support position of the temporary pier on the side span through wind resistance performance detection, site topography, geological conditions, construction difficulty and construction safety, sets boundary constraint conditions, and determines the timing of temporary pier installation and temporary pier removal, so as to provide future Make full preparations for temporary pier support, by installing the upper support lug at the bottom of the steel girder, the upper support lug cooperates with the two lower support lugs installed on the transverse limit frame, the lower support lug and the upper support lug There are waist-shaped holes that match the supporting connectors on both sides, allowing the cable-stayed bridge to have a certain displacement change in the longitudinal direction, limiting the vertical displacement change of the steel main girder, and the force is clear.

Description

technical field [0001] The invention belongs to the technical field of temporary pier support, and in particular relates to a temporary pier support method for a long-span steel-concrete composite girder cable-stayed bridge. Background technique [0002] Temporary piers are temporary bridge piers erected for structural stress and safety during bridge construction. With the continuous development of bridge design and construction technology, more and more long-span steel-concrete composite girder cable-stayed bridges are being built. During the construction of long-span steel box girder cable-stayed bridges, temporary piers must be set up to ensure the safety and stability of the cable-stayed bridge before closing. However, the addition of temporary piers will cause significant changes in the deflection of the tower, which will increase the difficulty of controlling the alignment of the long-span steel-concrete composite girder cable-stayed bridge. Load, and affected by the ...

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Problems solved by technology

However, the addition of temporary piers will cause significant changes in the deflection of the tower, which will increase the difficulty of controlling the alignment of the long-span steel-concrete composite girder cable-stayed bridge. Load, and affected by the horizontal component force of the cable stay and temperature, the improper design of the connection between the main girder and the temporary pier will generate a large horizontal force. Therefore, there is a lack of a temporary connection with high construction accuracy, small safety risks, and strong operability. Temporary piers of long-span steel-concrete composite girder cable-stayed bridge

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