Erecting method of cable-stayed bridge main beam and cable-stayed bridge main beam

Abstract

The invention discloses an erecting method of a cable-stayed bridge main beam and the cable-stayed bridge main beam, and relates to the technical field of bridge construction. The method includes 1) prefabricating a plurality of steel beam assembly segments; 2) moving a bridge deck crane to the erected segmental beams; 3) sequentially hoisting the two steel beam assembly segments on cantilevers ofthe erected section beams by utilizing the bridge deck crane to form two connected section steel beams, after each section of steel beam is formed, connecting the section steel beams with a main tower of the cable-stayed bridge through stay cables, and tensioning the stay cables for the first time; 4) hoisting prefabricated concrete bridge deck slabs to the two section steel beams by using the bridge deck crane; 5) pouring a wet joint between the concrete bridge deck slabs, tensioning the stay cables on the two sections again, and when erection of the two section beams is completed, moving the bridge deck crane in the direction of the newly-erected section beams; and 6) repeating the steps 2-5 until all the segmental beams are erected. The erecting speed of the main beam of the cable-stayed bridge can be increased, and the beam erecting period is shortened.

Description

technical field [0001] The present application relates to the technical field of bridge construction, in particular to a method for erecting a main girder of a cable-stayed bridge and the main girder of a cable-stayed bridge. Background technique [0002] With the rapid development of the economy, the speed of bridge construction is increasing day by day. The conventional erection of the main girder of the cable-stayed bridge includes the cantilever assembly method, which uses the deck crane to hoist and erect the bridge section by section. Segmental assembly method or piece assembly method, wherein, the whole section assembly method is hoisting segmental composite beams as a whole, and the piece assembly method is first hanging and assembling steel beams in parts, and then hoisting the bridge deck on the suspended steel beams . [0003] In the construction of traditional steel-concrete composite beams of cable-stayed bridges, single-segment circulating cantilever parts are...

AI Technical Summary

Problems solved by technology

However, in this cyclic cantilever assembly and erection method, the displacement of the bridge deck crane and the maintenance time of the wet joints during the construction interval of the two segment composite beams all account for a large proportion of the construction period in the erection of the composite beam, resulting in Long construction period and low construction efficiency for assembly and erection of circular cantilever parts

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