Non-blasting construction method for dismantling pier to land bridge

Abstract

The invention discloses a non-blasting construction method for dismantling a pier to land the bridge. The method comprises the following steps of: forming a notch from the top middle of the pier; filling the notch with sandbag temporary supports; dismantling the pier top structures on the two sides of the sandbag temporary supports so that a girder falls on the sandbag temporary supports; placing sandbag temporary supports on the top surfaces on the two sides of the upper end of the pier respectively; and releasing sand in the middle sandbag temporary supports so that the girder falls on the sandbag temporary supports on the two sides until the end part of the bridge falls on the ground. The construction method has good safety, effectively controls the falling speed and amplitude of the bridge, ensures the construction safety, and is economical. The equipment is relatively simple, the construction cost is relatively low, and the operability is high. The dismantled machinery does not need to be placed on the bridge floor, and a bracket below the bridge floor is not required either; and moreover, the working surface is large, the construction is flexible, the operability is high, the construction process is compact, the construction period is short, and the practicability is strong.

Description

technical field [0001] The invention belongs to the technical field of bridge dismantling and construction, and in particular relates to a construction method for dismantling bridge piers without blasting to land the bridge. Background technique [0002] Cable-stayed bridge, also known as cable-stayed bridge, is a bridge in which the main girder is directly pulled on the bridge tower with multiple prestressed rigid cable-stayed rods. A structural system composed of beams and bodies. The cable-stayed bridge mainly includes two piers, tower piers, bridge towers, main girder and multiple cable-stayed rods; the two bridge piers and the tower piers are vertically arranged at the two ends and the middle of the cable-stayed bridge respectively; the main girder spans the two On the top surface of a bridge pier and a tower pier, it is composed of a plurality of main girder sections connected end to end; the bridge tower is vertically installed on the main girder located on the upper...

AI Technical Summary

Problems solved by technology

[0003] In the static cutting bridge demolition method, whether it is a wire saw bridge or a butterfly cutting bridge, the cutting equipment must be placed on the bridge surface to be cut, which will be detrimental to the construction safety, and the working surface when cutting the main body of the bridge is small. , the efficiency is low; when the bridge or pier is directly broken by the crushing method, the work risk factor is high, the labor volume is large, the economic cost is high, and the operation and construction requirements of the staff are high; when the bridge is demolished by the jacking method, it is necessary to set up supports, and the workload is large , the economic cost is high; and when the bridge is dismantled by hoisting, there are requirements for working conditions, and the location of the hoisting equipment needs to be considered

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