Steel truss arch bridge and construction method

Abstract

The invention discloses a steel truss arch bridge and a construction method. The steel truss arch bridge comprises main piers, tie bars, steel pipe piles, temporary buttresses, chord members, hangingrods, support steel pipes, support crawling ladders, #-shaped ladders, steel bar hanging cages, leveling steel pipes, H-shaped cross beams, cross beams, movable longitudinal beams, channel steel, a guardrail with a safety green net, flange plates, steel pipe stand columns, a jig frame, an anti-falling net, a rest platform, longitudinal-transverse bridge construction channels, wood springboards andguardrail net arch ribs. According to the construction method, construction is conducted according to the sequence of first bridge and then arch. The construction method comprises the following stepsof firstly mounting side spans and combination sections, then mounting mid-span bridge decks, finally mounting main arch rib hanging rods, chord members, transverse braces, parallel braces and web members, assisting construction by utilizing a temporary buttress system, arranging safety protection crawling ladders and #-shaped ladders at the side parts of temporary brackets, and erecting construction channels between the temporary brackets. Working of workers among all parts is facilitated, and the safety coefficient is increased.

Description

technical field [0001] The invention relates to the field of steel truss arch bridge engineering systems, in particular to a steel truss arch bridge and a construction method. Background technique [0002] With the development of economy and society and the acceleration of urbanization, people's living standards are also constantly improving. Bridges are no longer just traffic roads for people. They need to meet their practicality. In addition, people pay more attention to their aesthetics. Make it take up less space and realize space saving. Since the early steel bridges were mainly used in the design of railways and highways, limited by the conditions, the basic installation method was the arch first and then the beam method. Later, a new construction method - the beam first and then the arch method was produced, among which the well-known one in China is Xiamen-Shenzhen Railway Rongjiang Bridge. [0003] In the construction process of long-span steel truss arch bridges ...

AI Technical Summary

Problems solved by technology

[0003] In the construction process of long-span steel truss arch bridges with bridge first and arch later, there are often the following problems: (1) The construction line type is difficult to control, and the steel truss arch members are in the form of bolted connections, which require high precision; (2) The bridge mid-span It is a large-span area across the Pai River, and the geological conditions cannot meet the bearing capacity requirements of the foundation of the bridge erection support; (3) The main truss structure is large in size, and it is difficult to install tie bars and beams. It is inconvenient for workers to switch between various components, and the safety cannot be guaranteed ensure

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