Old frame bridge dismantling method in new-old frame bridge replacing process

Abstract

Provided is an old frame bridge dismantling method in a new-old frame bridge replacing process. An old frame bridge is divided into a plurality of annular structures to be dismantled step by step, a plate saw is used first for cutting a bottom plate and the lower portion of a stand wall along cutting lines to form concrete blocks of certain sizes, then a rope saw is used for cutting the upper portion of the stand wall and a top plate, a breaking hammer is used for breaking large concrete blocks to form small concrete blocks, and finally a loading machine is used for cleaning and conveying. Due to the fact that rope saw cutting and plate saw cutting are both non-vibration static force cutting, influence on existing lines and a railway base is minimum, railway base unstability cannot be caused, safety of passing trains cannot be affected, and accordingly safety is good. In addition, the breaking hammer is used for construction in a matched mode during cutting, construction is greatly accelerated, and construction time is shortened.

Description

technical field [0001] The invention belongs to the technical field of railway construction, in particular to a method for dismantling an old frame bridge during the replacement process of a new and old frame bridge. Background technique [0002] With the development of the economy, the existing old frame bridge can no longer meet the increasingly busy traffic requirements. At this time, the old frame bridge needs to be demolished, and then a new frame bridge should be built in place, that is, the old frame bridge should be replaced with a new frame bridge. . The commonly used replacement method for old and new frame bridges is the jacking method. This method needs to demolish the main bridge and culvert of the old frame bridge while jacking the bridge and culvert of the new frame bridge under the condition of ensuring the normal operation of the existing railway on it. The specific method is to first A section of the rear of the old frame bridge is removed, and then a sect...

AI Technical Summary

Problems solved by technology

However, this jacking method has the following problems: the current demolition of the old frame bridge is to use the breaking hammer to gradually destroy the structure of the old frame bridge. Although this method can remove the old frame bridge relatively quickly, the disadvantage is that Because the vibration of the breaking hammer is quite large, especially when removing the roof closest to the railway subgrade, it will cause the instability of the railway subgrade, which will have a great impact on the safety of passing trains, so the safety is poor

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