A new construction method of hybrid combined beam cable-stayed bridge

Abstract

The invention relates to a brand-new construction method of a mixed combined girder cable-stayed bridge. After the construction of the main tower, auxiliary piers, side piers, main bridge side span concrete beams and approach bridges, the mid-span steel girder members and prefabricated concrete decks of the cable-stayed bridges are transported from the ground via the approach bridges and main bridge side spans to Midspan. The truck crane also moves from the ground through the approach bridge and the side span of the main bridge to the front end of the completed combined beam in the mid-span, and lifts the components on the girder truck for cantilever construction. The bridge is hung with stay cables and tensioned for the first time. Construct the wet joints of the bridge deck, form the mid-span combined beam of this section, and repeat the construction until the main structure of the cable-stayed bridge is completed, and the bridge deck and the auxiliary structure of the main tower are constructed. The invention adopts the automobile crane, which can adapt to the construction of the wide bridge, and is convenient and flexible in use, and saves labor;

Description

technical field [0001] The invention belongs to the field of bridge construction engineering and relates to a construction method of a brand-new hybrid combined beam cable-stayed bridge. Background technique [0002] In recent years, a large number of transportation infrastructures have been built in my country, and various cable-stayed bridges across rivers, straits, highways, railways and other terrains have emerged continuously, requiring continuous innovation and development of construction methods for cable-stayed bridges to meet the needs of various construction situations . [0003] The construction method of a cable-stayed bridge mainly refers to the construction method of its main girder, because the construction method of the main tower and cable-stayed cables is relatively fixed. When the main girder adopts the concrete girder, the construction methods mainly include the cast-in-place method of the bracket, the cast-in-place method of the cantilever hanging basket...

AI Technical Summary

Problems solved by technology

This kind of bridge deck crane is fixed on the steel girder in the center of the bridge deck during operation, and can walk forward along the fixed track. Its assembly and disassembly are troublesome, and it has poor adaptability to bridges with wide decks.

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