Ballastless track railroad roadbed surface water sealing layer structure

Abstract

The invention discloses a ballastless track railroad roadbed surface water sealing layer structure which comprises a water-resisting layer, a prefabricated paved surface and a sand cushion. The sand cushion is arranged on the water-resisting layer, and the prefabricated paved surface is arranged on the sand cushion. Soil engineering seepage-proofing materials of two pieces of fabric and one film are adopted in the water-resisting layer, and the water-resisting layer is formed by combining the plastic thin film and the non-woven fabric. The roadbed surface water sealing layer structure is arranged on the inner side and the outer side of a track base, has transverse gradients and inclines towards the slanting underneath from the two sides of the track base. The water-resisting layer extends inwards to be below the track base and extends outwards to be outside a roadbed body, and surface water is made to flow out of a roadbed smoothly and is prevented from seeping into the roadbed. The water-resisting layer below the inner side line of the track base extends to a ditch between lines, and the water-resisting layer on the outer side of the track base extends to be below a cable groove outside the roadbed body. The ballastless track railroad roadbed surface water sealing layer structure solves the problem of leakage caused by the cracking and damage of a fiber concrete and bituminous concrete waterproof layer, adopted prefabricated paved surfaces can be prefabricated in factories, pavement is convenient, maintenance and repair are simple, construction cost is low, and new application prospects are revealed in ballastless track railroad roadbed projects.

Description

technical field [0001] The invention belongs to the technical field of railway subgrade, and particularly relates to a water-sealing layer structure of a ballastless track railway subgrade surface. Background technique [0002] Mud, frost heave, etc. are common subgrade diseases of railways and highways, especially the subgrade of ballastless railways are more vulnerable to them. These roadbed diseases bring greater difficulties to maintenance and repair, and bring great hidden dangers to safe operation. The main factor leading to these two diseases is surface water, therefore, reliable waterproof and drainage measures need to be set up on the subgrade surface. At present, the subgrade surface of ballastless track railway is generally provided with a waterproof layer of fiber concrete or asphalt concrete to prevent the infiltration of surface water into the subgrade. [0003] figure 1 The waterproof structure of the ballastless track railway subgrade surface of the prior ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the waterproof structure of the subgrade surface of ballastless track railways in the prior art, the present invention introduces a new type of subgrade surface water-sealing layer structure, which combines two cloth-one-membrane water-proof layers with prefabricated pavement and sand cushions. To solve the problems of fiber concrete and asphalt concrete waterproof structures, such as easy cracking, pulverization and difficulty in guaranteeing waterproof effect

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