A rapid construction method for a double-tower five-span steel box truss cable-stayed bridge

Abstract

The invention discLoses a quick construction method for a twin tower five cross steeL box trussed beam cabLe-stayed bridge, and beLongs to the technicaL fieLd of steeL box trussed beam cabLe-stayed bridge construction in bridge construction; the technicaL purpose is to provide the quick construction method for the twin tower five cross steeL box trussed beam cabLe-stayed bridge capabLe of effectiveLy controLLing the profiLe of the bridge and increasing the construction speed and the accuracy of joining two sections of the bridge. The method comprises the foLLowing steps that two side portionsof the bridge are firstLy compLeted; a guiding beam and a steeL beam structure are weLded towards the sidespan side by utiLizing top pushing equipment, and three sections of a steeL box beam are Leftbehind to instaLL a steeL trussed beam untiL one side portion of the cabLe-stayed bridge is compLeted; after top pushing is conducted on the two sides of the bridge to the suitabLe pLace, residuaL sections are erected to a joining section, the joining section is instaLLed, after the instaLLment of the joining section is compLeted, fuLL-bridge cabLe adjusting is conducted, temporary piers are dismantLed, and the fuLL-bridge profiLe is adjusted; the method can be appLied to the fieLd of the construction of twin tower five cross steeL box trussed beam cabLe-stayed bridges.

Description

technical field [0001] The invention discloses a rapid construction method for a steel box truss girder cable-stayed bridge with two towers and five spans, belonging to the technical field of steel box truss cable-stayed bridge construction in bridge engineering. Background technique [0002] For long-span railway cable-stayed bridges, there are two main structural forms of steel girder girder bodies: steel box girder and steel truss girder. In recent years, with the rapid construction of high-speed railways, in order to adapt to various environments, long-span cable-stayed bridges continue to emerge. At the same time, in order to meet the safety and smooth operation of high-speed railways, the main girder in the form of a steel box-truss combination with high rigidity is designed. The long-span oblique bridge adopting the main girder of the box-truss composite structure includes the Menghua Railway Dongting Lake Super Bridge, which is a cable-stayed bridge with three towers...

AI Technical Summary

Problems solved by technology

The structure of the double-tower five-span steel box truss cable-stayed bridge is novel. The construction method of the double-tower five-span steel The construction method of the bridge has not been reported. The Dongting Lake Bridge on the Menghua Railway adopts the construction method of symmetrical cantilever, first box and then truss. The symmetrical cantilever method has the characteristics that the tower and the girder must be first constructed in the early stage, the tower and girder are synchronized in the middle stage, and there are multiple closures in the later stage. , the construction speed is relatively slow, and the large number of closures will also have an adverse effect on the closure accuracy and alignment control of the twin-tower five-span steel truss girder cable-stayed bridge

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