Cutting, splitting and breaking transformation construction method for existing overall ballast bed of subway

Abstract

The invention discloses a cutting, splitting and breaking transformation construction method for an existing overall ballast bed of a subway. The method includes the steps that the ballast bed is perpendicularly cut on a concrete ballast bed plate in the longitudinal direction of a line within the distance of not larger than 3.6 cm through a wall saw, and cutting is conducted to the depth that the part between a concrete face to steel bars is cut off but a pipe piece is not damaged; then, a coring drilling machine is used for drilling along a cutting line, the number of drill holes is 2-6, the diameter of the drill holes is determined according to requirements, the depth of the holes is determined according to the requirement of a splitting bar, the hydraulic splitting bar is inserted into the drill holes to adjust the splitting direction, and pressurizing expanding is conducted until the plate disengages from a pipe wall; and finally, a cantilever crane in a subway tunnel is used for craning the existing broken plate and conducting construction to newly lay a floating plate, and accordingly the transformation of the existing ballast bed is completed. The method is low in construction cost, easy to operate, high in construction speed and low in noise, construction is not stopped on an operation line, safety and reliability are achieved, and the requirements for urban civilized construction, operation line transportation, operation line safety and construction efficiency are met. The popularization prospects are wide.

Description

technical field [0001] The invention relates to the field of subway track bed construction, and in particular belongs to a construction method for cutting, splitting, breaking, and rebuilding existing integral track beds of subways. Background technique [0002] In the bustling area of ​​Shanghai City, near residential areas and commercial areas, the vibration and noise of subway rails are relatively high, which does not meet the environmental protection requirements. It is necessary to remove the entire ballast bed in the existing tunnel and transform it into a vibration-absorbing floating slab. For the track bed, this construction is the first time at home and abroad, and there are no design and construction precedents to learn from. Relying on the simulated non-stop construction of the Expo Park section of Shanghai Metro Line 13, we have made targeted choices in the selection of demolition machinery and equipment and method design, ensuring the smooth and safe completion ...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no precedent for existing ballast bed reconstruction under the state of operating lines at home and abroad. If the general chiseling method is used, the investment in equipment and manpower is large, the economy is poor, and the work efficiency is low, which cannot meet the operation needs of the business line. At the same time, the buildings under construction are chiseled Large amount of garbage and high noise pollution make it difficult to meet environmental protection requirements

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