Bridge lowering and dismantling device based on movable supporting and bridge lowering and dismantling construction method

Abstract

The invention relates to a bridge lowering and dismantling device based on movable supporting. The bridge lowering and dismantling device comprises a hoisting lifting mechanism, two groups of splicingtype supporting frames and two groups of connecting and supporting cross beams. The hoisting lifting mechanism is mounted on the connecting and supporting cross beams. The two groups of splicing typesupporting frames are symmetrically arranged under the two ends of the supporting cross beams and are detachably and fixedly connected with the two ends of the supporting cross beams. The bridge lowering and dismantling device further comprises a movable conveying mechanism which is used for moving and bearing the splicing type supporting frame and the dismantled beam body. The invention furtherprovides a bridge lowering and dismantling construction method based on the dismantling device. According to the invention, less road construction time is occupied; traffic influence is small; bridgedemolition and transportation of dismantling parts can be safely and quickly completed; and the device is wide in applicability and less in dust pollution in use.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a device for lowering and dismantling bridges based on mobile supports and a construction method for lowering and dismantling bridges. Background technique [0002] With the development of my country's economy and society and the continuous advancement of urbanization, some existing urban bridges and highway bridges, especially the over-the-line bridges, can no longer meet the traffic demand and need to be demolished and rebuilt or moved. Some existing four-lane highways need to be expanded to meet social development, and the original flyover bridges are required to be quickly rebuilt. Large-scale demolition of such old bridges is imperative. Common demolition methods for existing old bridges include blasting demolition, mechanical chisel removal, and methods such as lifting and removing beams in blocks based on the cooperation of brackets and cranes. Blasting and demolit...

AI Technical Summary

Problems solved by technology

Mechanical chiseling requires the use of dozens or even hundreds of excavators and crushers for several days, causing long-term traffic interruptions, not only consuming a lot of resources such as fuel and manpower, but also generating serious noise and dust pollution, which endangers the surrounding area. Residents are healthy, and the crushed waste also needs a lot of equipment to be transported away

The lifting of the beam body based on the bracket-crane has the disadvantages of occupying the original bridge position for a long time, a large workload of cutting and dividing the beam body, long construction time, complicated construction technology and safety control, many structural conditions and high safety risks.

[0003] With the continuous investment in urban construction and the continuous increase of urban traffic volume, the actual needs of such projects will become increasingly severe, such as complex traffic environment, construction environment, social environment, safety and smoothness, and environmental protection construction period, and the difficulty of implementation and technical risks will continue to increase. Big

The above-mentioned existing methods are difficult to meet the requirements, and cannot realize resource reuse such as substructure, concrete beam debris, etc., resulting in unnecessary waste of resources

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