A kind of subway tunnel track bed and drainage ditch structure reinforcement method

Abstract

The invention relates to a method for reinforcing the structure of a track bed and a drainage ditch of a subway tunnel, which specifically includes: judging the disease degree of the track bed and the drainage ditch, the disease degree includes serious disease and general disease, and if the disease degree is a general disease, chisel out loose structures, Arrange grouting holes in the track bed and drainage ditch according to the plum-blossom pile shape, and grouting into the grouting holes on the track bed and drainage ditch. If the disease degree is serious, the loose structure shall be chiseled, and the space cleared on the track bed shall be filled with dilute and quick filling. Hard castable, the space cleared on the drainage ditch is shaped with PVC half-pipe and double-speed cement, several pouring holes are opened at the center of the track bed, grouting holes are arranged in the drainage interval, and the pouring holes are poured into the pouring holes successively. Hard castable and thick fast hard castable, and then pour epoxy resin slurry into the grouting hole. Compared with the prior art, the present invention has the advantages of saving manpower and material resources, high construction efficiency, and no influence on operation.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a method for reinforcing a subway tunnel track bed and a drainage ditch structure. Background technique [0002] Subway lines are becoming more and more popular in urban traffic in my country. There are many tunnel railways. With the passage of operation time, train load and the influence of groundwater, the trackbed of tunnel railways will suffer from many diseases, such as the cracking of the drainage ditch itself, the drainage ditch and the overall track bed. Or the joint part of the segment is cracked, the overall track bed structure and the track bed and the tunnel segment arch bottom block are separated, and the disease can cause the sleeper to break away from the track bed and the overall track bed to break, endangering the safety of the train. Therefore, it is necessary to reinforce the track bed and the drainage channel. [0003] The prior art also provides some soluti...

AI Technical Summary

Problems solved by technology

[0005] One is that the grout injected in this patent is ordinary cement without aggregate, the maintenance period is long, and the compressive strength can only reach about C35;

[0006] The second is that the cement slurry is not a self-leveling material, and cannot complete the full filling and compaction of the underground hoisting empty position by itself;

[0007] The third is that the epoxy material cannot be effectively and rapidly solidified under the low temperature condition at the bottom of the tunnel, and cannot quickly form support and reinforcement for the ballast bed and withstand vibration and extrusion during the short construction skylight period

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