Installation method of through tied arch bridge

Abstract

The invention provides an installation method of a through tied arch bridge. The installation method comprises the following steps that S1, an arch support to be assembled is lifted; S2, the arch support to be assembled is lifted to the designed elevation, and the arch support is firmly fixed after the relative position is adjusted; S3, a 50t crane is adopted to hoist and close the wind brace arch support; S4, after wind brace arch support folding is completed, the A-shaped supporting frame is installed, and then corresponding parts are disassembled; S5, a wind brace arch support is pushed; S6, the wind brace arch support is pushed to a bridge position where a second pier is arranged, a beam falls in place, a sling is mounted, and a guide beam and a second assembly bracket are dismounted; and S7, the A-type support and the pushing support are dismantled, the sling is tensioned, and construction is completed. According to the installation method of the through tied arch bridge, the structure is simple, and operation is convenient; the support consumption investment is reduced; the hoisting cost investment is reduced; the wind brace arch supports can be assembled in a matched mode, the installation accuracy is improved, and what is guaranteed is that the deviation is within the allowable deviation range; the construction safety risk is reduced.

Description

technical field [0001] The invention mainly relates to the technical field of bridges, in particular to a method for installing an under-supported tied-bar arch bridge. Background technique [0002] The installation of bridges is limited by site conditions (crossing existing roads, crossing rivers, crossing rivers, etc.), and hoisting is often used for installation. Most of the construction of its main structure adopts the erection of assembled brackets in the span of the bridge, and the erection of crane walking trestles on both sides of the bridge position. The beams are assembled first and then the arches. However, many tied arch bridges have large span height loss, and the design of wind braces has modeling requirements. The shape of the wind brace structure is complicated, and it is difficult to install at high altitude. A large number of supports need to be erected at the ring mouth of the arch rib and the bottom of the wind brace, and the hoisting of the arch rib als...

AI Technical Summary

Problems solved by technology

However, many tie-bar arch bridges have large span height loss, and the design of wind braces has modeling requirements. The shape of the wind brace structure is complex, and it is difficult to install at high altitudes.

A large number of supports need to be erected at the ring mouth of the arch rib and the bottom of the wind brace, and the hoisting of the arch rib also needs to be hoisted by a large crane. The construction cost is huge, the work efficiency is low, and the safety risk of working at heights is great

If there are arch ribs and wind braces at high altitudes and cannot be quickly put in place, the matching accuracy of wind braces and arch ribs will deviate greatly, and the adjustment will be time-consuming and laborious

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