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Ballastless track waterproof and drainage subgrade bed structure and laying method thereof

A ballastless track, waterproof and drainage technology, applied in the direction of roads, tracks, ballast layers, etc., can solve the problems of unsatisfactory waterproof and drainage effects of subgrade bed structures, so as to improve waterproof and drainage performance, prevent water damage, and prolong service life Effect

Pending Publication Date: 2018-09-04
SOUTHWEST JIAOTONG UNIV +1
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  • Claims
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a ballastless track waterproof and drainage subgrade bed structure and its laying method, so as to solve the problem of unsatisfactory waterproof and drainage effect of the subgrade bed structure in the prior art

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  • Ballastless track waterproof and drainage subgrade bed structure and laying method thereof
  • Ballastless track waterproof and drainage subgrade bed structure and laying method thereof
  • Ballastless track waterproof and drainage subgrade bed structure and laying method thereof

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Embodiment Construction

[0044] The present invention will be clearly and completely described below in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before the present invention is described in conjunction with the accompanying drawings, it should be pointed out that:

[0045] The technical solutions and technical features provided in each part of the present invention, including the following description, can be combined with each other under the condition of no conflict.

[0046] In addition, the embodiments of the present invention referred to in the following description are generally only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

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Abstract

The invention discloses a ballastless track waterproof and drainage subgrade bed structure, comprising a bed bottom layer, primary geotextile, a base surface layer, a base plate and a track plate which are arranged from bottom to top, and also comprising seal layers arranged on the two sides of the base plate; a waterproof and drainage structure is arranged between the seal layers and the bed surface layer and between the base plate and the bed surface layer; the waterproof and drainage structure a polyurethane gravel tier and secondary geotextile arranged sequentially from bottom to top. Theinvention also discloses a laying method of the ballastless track waterproof and drainage subgrade bed structure; the primary geotextile is double-layer geotextile; the secondary geotextile includes composite geotextile arranged below the base plate and double-layer geotextile arranged below the seal layers. The ballastless track waterproof and drainage subgrade bed structure has good mechanical properties and water stability, can block rainwater from seeping inside, can provide extended life for a track, can prevent water from seeping inside to cause damage to the subgrade structure, and canprovide improved waterproof and drainage performances for the subgrade structure.

Description

technical field [0001] The invention relates to the technical field of railway tracks, in particular to a ballastless track waterproof and drainage subgrade bed structure and a laying method thereof. Background technique [0002] In recent years, my country's high-speed railway has developed rapidly. The subgrade is the foundation of the track. As the substructure of the railway line, its smoothness, uniformity and long-term stability are crucial to the safe operation of high-speed trains. In the subgrade bed structure, the surface layer of the subgrade bed is subjected to the greatest dynamic stress and is easily affected by external rainwater factors. Such as figure 1 As shown, the existing subgrade bed structure includes the bottom layer of the subgrade bed, the surface layer of the subgrade bed, a base plate, and a track plate arranged from bottom to top, and sealing layers are provided on both sides of the base plate. [0003] Under the existing design conditions of t...

Claims

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Application Information

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IPC IPC(8): E01B1/00E01B2/00
CPCE01B1/00E01B1/008E01B2/00Y02A30/60
Inventor 苏谦谢康黄俊杰王迅杨国涛刘宝刘亭牛乐乐郭源浩
Owner SOUTHWEST JIAOTONG UNIV
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