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Contact layer structure of ballastless track and surface layer of subgrade bed and laying method of contact layer structure

A technology of ballastless track and laying method, which is applied in the direction of track, ballast layer, road, etc., can solve the problems of vibration contact, void, etc., and achieve the effect of improving strength, large deformation modulus, and good elongation performance

Active Publication Date: 2018-11-20
SOUTHWEST JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide the structure of the contact layer between the ballastless track and the surface layer of the subgrade bed and its laying method, so as to solve the problems in the prior art that the subgrade bed is mud-floured and the vibration contact between the base plate and the surface layer of the subgrade bed is even empty.

Method used

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  • Contact layer structure of ballastless track and surface layer of subgrade bed and laying method of contact layer structure
  • Contact layer structure of ballastless track and surface layer of subgrade bed and laying method of contact layer structure
  • Contact layer structure of ballastless track and surface layer of subgrade bed and laying method of contact layer structure

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Effect test

Embodiment 1

[0045] like Figure 1-2 The structure of the contact layer between the ballastless track and the surface of the bed is shown. The ballastless track includes a base plate 2 and a sealing layer 3 located above the surface 1 of the bed. The sealing layer 3 is located in the lateral direction of the base plate 2. The contact layer structure includes a crushed stone bonding layer 4 arranged between the surface layer of the foundation bed 1 and the base plate 2 and the sealing layer 3, the first layer on the upper surface of the crushed stone bonding layer 4 An adhesive layer 5, a first waterproof structure 6 disposed between the first adhesive layer 5 and the base plate 2, and a second waterproof structure disposed between the first adhesive layer 5 and the sealing layer 3 7. The crushed stone bonding layer 4 includes a first crushed stone layer and a polymer adhesive filled in the crushed stone gaps of the first crushed stone layer.

[0046] The first adhesive layer 5 includes a ...

Embodiment 2

[0058] Compared with Example 1, the difference in the structure of the contact layer between the ballastless track of this example and the surface layer of the bed is as follows: image 3 As shown, the contact layer structure also includes a polymer adhesive filled in the gravel gaps of the second gravel layer and a second bonding layer 8 located on the upper surface of the second gravel layer. Both the second adhesive layer 8 and the polymer adhesive filled in the gap between the second gravel layers are emulsified asphalt.

[0059] The laying method of the contact layer structure between the ballastless track and the bed surface layer comprises the following steps:

[0060] 1) Sprinkle emulsified asphalt on the second gravel layer, the amount of emulsified asphalt spread is 1.2L / m 2 , a part of the emulsified asphalt penetrates into the gap of the second crushed stone layer, and a part is solidified on the upper surface of the second crushed stone layer to form the second ...

Embodiment 3

[0067] Compared with embodiment 2, the difference of the laying method of the ballastless track of the present embodiment and the contact layer structure of the subgrade bed surface layer is: 1) spread emulsified asphalt on the second crushed stone layer, and the spread amount of emulsified asphalt is 1L / m 2 , so that the emulsified asphalt penetrates into the gap of the second crushed stone layer; after the emulsified asphalt is solidified, polyurethane is spread on the upper surface of the second crushed stone layer, and the second bonding layer 8 is formed after the polyurethane is cured;

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Abstract

The invention discloses a contact layer structure of a ballastless track and a surface layer of a subgrade bed and a laying method of the contact layer structure. The ballastless track comprises a base plate and a sealing layer located on the surface layer of the subgrade bed; the sealing layer is located on two sides of the lateral direction of the base plate; the contact layer structure comprises a gravel bonding layer arranged between the surface layer of the subgrade bed and the base plate as well as the sealing layer, a first bonding layer located on the upper surface of the gravel bonding layer, a first waterproof structure arranged between the first bonding layer and the base plate, and a second waterproof structure arranged between the first bonding layer and the sealing layer; andthe gravel bonding layer comprises a first gravel layer and a polymer adhesive filled in gravel clearances of the first gravel layer. Therefore, the contact layer structure of the ballastless track and the surface layer of the subgrade bed provided by the invention is simple in structure, and can effectively solves the problem of interlayer vibration contact and even disengagement of subgrade bedmudding and the base plate-the surface layer of the subgrade bed.

Description

technical field [0001] The invention relates to the technical field of ballastless track, in particular to the structure of the ballastless track, the structure of the contact layer between the ballastless track and the surface layer of the foundation bed, and a laying method thereof. Background technique [0002] The operation practice of high-speed railways at home and abroad shows that as the operation time continues to increase, under the complex natural environment and repeated impact loads of high-speed trains, the ballastless track subgrade will inevitably appear damage, damage and other diseases, and the structural defects and diseases of the offline engineering It is gradually revealed in the ballastless track line. More than 8% of the existing high-speed railway lines in my country have various subgrade bed diseases, and the task of railway subgrade disease remediation is very arduous. If left unchecked, it will likely reduce the stability, smoothness and bearing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B1/00
CPCE01B1/002E01B1/008E01B2204/11E01B2204/07E01B2204/09E01B2204/06E01B2204/03
Inventor 苏谦刘亭王迅王武斌
Owner SOUTHWEST JIAOTONG UNIV