Renovation method for subgrade foundation bed surface layer frost boiling of ballastless track

Abstract

The invention provides a renovation method for the subgrade foundation bed surface layer frost boiling of a ballastless track. The method is characterized in comprising the following steps that: determining the frost boiling section of a foundation bed surface layer; arranging a drainage channel on the road shoulder of the frost boiling section, wherein the drainage channel communicates with the open joint of the foundation bed surface layer to discharge accumulated liquids in the open joint out of the ballastless track to fill and seal the drainage channel; arranging glue injection holes on the frost boiling section, wherein the glue injection holes penetrate through a supporting layer and communicate with the open joint; and pouring glue bodies through the glue injection holes until theopen slot is completely filled. By use of the renovation method provided by the invention, the accumulated liquids in the open slot are discharged out of the ballastless track through the drainage channel, the open slot of the foundation bed surface layer is subjected to glue injection filling, so that the open slot can be completely filled with the glue body, subgrade supporting strength is recovered, the accumulated liquid can be prevented from infiltrating into the bottom layer of the subgrade foundation bed so as to prevent aggregates on the foundation bed surface layer from being extrudedout of the ballastless track, and a foundation bed surface layer frost boiling problem is solved.

Description

technical field [0001] The present application relates to the field of geotechnical engineering, in particular to a method for treating the surface of the subgrade bed of a ballastless track subgrade. Background technique [0002] China's ballastless track has been laid for more than 20,000 kilometers. During long-term operation, under the long-term action of natural factors and train dynamic loads, the surface of the subgrade bed has muddying disease. When the above-mentioned diseases develop to a serious stage, the ballastless track line The smoothness of the ballastless track will be adversely affected, which will bring serious hidden dangers to the safety of ballastless track operation. Contents of the invention [0003] In view of this, the embodiment of the present application expects to provide a method for treating the surface of the subgrade bed of the ballastless track with slurrying, so as to solve the technical problem of the surface of the subgrade bed of the ...

AI Technical Summary

Problems solved by technology

[0002] China's ballastless track has been laid for more than 20,000 kilometers. During long-term operation, under the long-term action of natural factors and train dynamic loads, the surface of the subgrade bed has muddying disease. When the above-mentioned diseases develop to a serious stage, the ballastless track line It will have adverse effects on the smoothness of the ballastless track and bring serious hidden dangers to the safety of ballastless track operation.

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