Dismantling method for concrete rigid frame arch bridge

Abstract

The invention discloses a dismantling method for a concrete rigid frame arch bridge. The construction method comprises the following steps that construction preparation is conducted, specifically, a reasonable dismantling sequence is determined, cutting equipment is selected and is in place, buoyancy tank supports are arranged and checked, and lifting tools are checked; block dividing and paying off are conducted, specifically, according to the dismantling sequence, to-be-dismantled structures are subjected to block dividing and arranging; auxiliary arrangement such as handrails and micro-bending plates are dismantled; cutting machines and the buoyancy tank supports are mounted; primary and secondary arch ribs and connecting systems are cut and hoisted; a sunk well foundation dismantling protection structure is constructed; sunk well foundation block diving cutting and hoisting are conducted; and foundation pit backfill, river cross section recovery and protection structure dismantling are conducted. According to the dismantling method, by setting up the scientific dismantling sequence and using reasonable dismantling equipment, the disadvantages that as for a traditional dismantling method, the potential safety hazard is large, dismantling noise and dust are more, secondary cleaning pollution is serious, and the difficulty is large are avoided, and thus dismantling construction can be safely and efficiently carried out in an environmentally friendly mode.

Description

technical field [0001] The invention relates to a demolition method, in particular to a demolition method of a concrete rigid frame arch bridge, and belongs to the technical field of arch bridge demolition methods. Background technique [0002] In the demolition of traditional rigid-frame arch bridge structures, large-scale mechanical crushing (excavators, hydraulic hammers) is often used for demolition of the bridge deck, causing a large number of broken structures to fall into the river; arch ribs are mostly collapsed by chiseling or blasting, and then divided into pieces Cutting method; the demolition of caisson foundations mostly adopts the method of blasting loosening combined with crushing demolition. This method of demolition often has a great impact on the environment, such as large noise, collapse of arch ribs, high safety risks of caisson blasting and disturbance to the surrounding environment Bridge structures such as large and broken concrete blocks will pollute ...

AI Technical Summary

Problems solved by technology

[0002] In the demolition of traditional rigid-frame arch bridge structures, large-scale mechanical crushing (excavators, hydraulic hammers) is often used for demolition of the bridge deck, causing a large number of broken structures to fall into the river; arch ribs are mostly collapsed by chiseling or blasting, and then divided into pieces Cutting method; the demolition of caisson foundations

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