A continuous dumping demolition method for multi-span viaduct bridges

Abstract

The invention discloses a continuous collapsing type detachment method for a multi-span elevated bridge. The continuous collapsing type detachment method comprises the following steps of S1, setting of cut position and cut depth: selecting a cut position on a bridge body, wherein the distance between an edge pier and the adjacent cut position and the distance between the two adjacent cut positions are greater than the distance between the two adjacent bridge piers; cutting the bridge body along the cut position, wherein the cut depth shall be capable of maintaining the stability of the bridge body under the actions of self weight, construction load and live load; S2, arrangement of an impact system and a traction system: arranging the impact system on the edge pier of one side of the bridge, and arranging the traction system on the edge pier along the impact direction; S3, impacting and traction: starting the impact system to impact the edge pier, using the traction system to perform traction on the edge pier, enabling the edge pier to collapse, and enabling the upper bridge body to collapse under the action of self gravity and apply impact force to the adjacent bridge piers to form domino effect, so as to realize the continuous collapsing type bridge detachment. The continuous collapsing type detachment method has the advantages that the safety and stability are realized, the environment-friendly effect of construction is realized, the technical operability is strong, and the high-efficiency and economic effects of construction are realized.

Description

technical field [0001] The invention mainly relates to a general bridge structure demolition technology, in particular to a continuous dumping demolition method of a multi-span viaduct. Background technique [0002] Most of the demolition methods of general bridge structures are borrowed from the demolition methods of buildings, such as blasting method, direct demolition method, mechanical lifting method, etc.; but there are still some methods that are only for bridge demolition according to the special situation of bridges, such as gantry crane demolition, Pushing demolition, pontoon demolition, etc. Classification of current bridge demolition methods can be divided into two major categories: blasting demolition method and mechanical (non-blasting) demolition method. Each category includes a variety of different demolition methods, each with its own scope of application. The mechanical demolition method refers to the use of mechanical equipment to break, divide, hoist and ...

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Problems solved by technology

The whole process is very cumbersome and the cost is very high

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