A kind of self-draining device and drainage method for subway track bed

Abstract

The invention discloses a self-draining device for a subway track bed and a drainage method. The self-draining device is embedded in the bottom of the subway track bed, and is sequentially formed from the outside to the inside as a shell, a water absorption body, a permeable layer and a drainage groove; the drainage groove is densely arranged along the length direction of the track. It is attached to the inverted arch of the tunnel, and after the track bed is peeled off from the tunnel, it is connected with the drainage channels on both sides of the subway track bed; the water permeable layer cover is arranged on the outside of the drainage groove, and the water absorption body is arranged on the outer circumference of the water permeable layer; the outer shell cover is arranged on the outer circumference of the water permeable layer , and a reserved gap is set between the bottom end face of the shell and the tunnel lining. The invention is arranged inside the track bed, can timely discharge the leaking water between the tunnel and the track bed, avoid the aggravation of the track bed emptying, avoid the phenomenon of mud popping, and ensure the safe running of the train.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a self-draining device and a drainage method for a subway track bed. Background technique [0002] With the continuous expansion of subway transportation demand and operating mileage, the number of subway tunnel risks and diseases is also increasing. Among them, the void of the ballast bed is a common disease problem in subway tunnels. After the overall track bed of the subway is emptied, there will be water seepage and mud and mud. The voiding of the overall track bed causes the track line and the overall track bed to deform or sink when the train passes, which may seriously affect the normal running speed of the train and cause great safety hazards to subway operations. [0003] The leakage of water in subway tunnels is the main cause of the emptying of the track bed. However, most of the existing subway tunnel drainage measures are the surface drainage of the track bed. O...

AI Technical Summary

Problems solved by technology

However, most of the existing subway tunnel drainage measures are drainage on the surface of the ballast bed. Once the ballast bed is voided, the existing drainage measures cannot discharge the accumulated water between the tunnel and the ballast bed in time, which will further increase the void space and affect the safe operation of the train.

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