Bearing system hybrid combined girder cable-stayed bridge and its construction method

Abstract

The invention relates to a support system mixed combined beam cable-stayed bridge and a construction method thereof. A side span concrete beam is poured on the side pier and the auxiliary pier of the cable-stayed bridge; a stayed cable hangs on a midspan combined beam; large-tonnage spherical steel supporting seats are arranged between two main towers and main tower piers; the midspan combined beam is constructed between the two large-tonnage spherical steel supporting seats; a concrete beam is adopted in the side span; a combined beam is adopted in the midspan; a supporting seat system is adopted in a full bridge; the main tower pier, the auxiliary pier and the side pier foundation are constructed firstly, and a pier body is constructed secondly in the construction; and the large-tonnagespherical steel supporting seats are lifted; pier beam temporary concretion is performed on the side span concrete beam and the main tower pier until the midspan is folded, namely a pier beam temporary concretion device is dismounted, thus finishing the conversion of a structure system. The main tower structure of the cable-stayed bridge provided by the invention has simple structure, good stressand less materials; the side span main beam and the main tower are constructed synchronously; the midspan main beam is in single cantilever construction; the construction antiwind capacity is strong;the midspan and the main tower can be constructed synchronously; and the main tower can be folded in full bridge before long being capped, and the construction time is short.

Description

technical field [0001] The invention belongs to the field of bridge construction engineering and relates to a cable-stayed bridge with a new structure and a construction method thereof. Background technique [0002] In recent years, a large number of transportation infrastructures have been built in my country, and various cable-stayed bridges crossing rivers, straits, highways, railways and other terrains have emerged continuously, requiring continuous innovation and development of cable-stayed bridge design and construction technology to adapt to various external construction conditions needs. [0003] The cable-stayed bridge is mainly composed of main tower, cable-stayed cables and main girder. The main tower is mainly a reinforced concrete structure, and a few bridges use steel towers. The stay cables adopt parallel steel wire stay cables or steel strand stay cables. The main girder mainly adopts prestressed concrete structure, composite beam structure and steel box gi...

AI Technical Summary

Problems solved by technology

The bridge is located in a plain area, and the towers below the bridge deck are not high, and the consolidation system cannot meet the force requirements

Images