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Construction and design method of anti-arch subgrade structure of ballastless track in cutting section

A technology of ballastless track and design method, which is applied in the direction of track, road, building, etc., can solve problems such as the difficulty of rectification of arching diseases and serious threats to the operation safety of high-speed railways, and achieve the improvement of anti-arching ability, reasonable construction, and lower basement arch effect

Active Publication Date: 2021-08-03
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: in view of the existence of the prior art, soft rocks generally have the properties of water swelling and unloading rheology, which will seriously threaten the operation safety of high-speed railways; For the problem of difficult rectification of the overhanging disease, the anti-arching subgrade structure, construction and design methods of the ballastless track in the cutting section are provided, which can effectively control the overhanging deformation of the ballastless track in the deep cutting section of the soft rock, and at the same time ensure the stability of the slope to meet the Requirements for track smoothness and slope stability of high-speed railways

Method used

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  • Construction and design method of anti-arch subgrade structure of ballastless track in cutting section
  • Construction and design method of anti-arch subgrade structure of ballastless track in cutting section
  • Construction and design method of anti-arch subgrade structure of ballastless track in cutting section

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Embodiment 1

[0050] Such as Figure 1-2 As shown, a ballastless track anti-arch subgrade structure in a cutting section described in this embodiment includes a bearing plate 1 arranged longitudinally along the line, and vertical arm plates 2 are respectively connected to both sides of the bearing plate 1 , the vertical arm plate 2 is used to block the slope soil 6 on the corresponding side of the cutting, at least one side of the bearing plate 1 protrudes from the corresponding vertical arm plate 2, and extends into the corresponding side slope In the soil body 6, the bearing plate 1 is connected with a prestressed anchor cable 5, and the bottom of the prestressed anchor cable 5 extends into the bearing layer 8, and the bottom of the bearing plate 1 is provided with an elastic compression layer 4, at least one of which is The prestressed anchor cable 5 runs through the elastic compressive layer 4 .

[0051] The anti-arch subgrade structure of the ballastless track in the cutting section o...

Embodiment 2

[0056] refer to figure 1 and figure 2 , a construction method of a ballastless track anti-arch subgrade structure in a cutting section of the present invention, comprising the following steps:

[0057] A1. Excavate the cutting slope in stages, and excavate the slope toe to the wing plate 3;

[0058] A2. Leveling the base, excavating trenches at intervals longitudinally, and laying an elastic compressive layer 4 in the trenches;

[0059] A3. Erect the construction formwork on the elastic compression layer 4, place the reinforcement cage of the bearing plate 1, the vertical arm plate 2, and the wing plate 3, and connect the main reinforcements by welding, accurately determine the position of each prestressed anchor cable 5, and reserve the cable hole, and pour concrete;

[0060] A4. Apply the prestressed anchor cable 5, and carry out pressure grouting to the anchor section, and stretch the prestress anchor cable 5 after the grout is solidified, wherein the anchor section is ...

Embodiment 3

[0065] refer to figure 1 and figure 2 , a design method for the anti-arching subgrade structure of the ballastless track in the cutting section described in the embodiment 1 described in the present embodiment, comprising the following steps:

[0066] Based on the structural form and size parameters of the anti-arching subgrade structure of the ballastless track in the cutting section described in Embodiment 1, a subgrade structure design model is established;

[0067] Establish the slope soil model according to the slope size of the cutting section; and make the slope soil model satisfy: when the depth of the load-bearing plate 1 extending into the slope soil 6 and the load-bearing plate 1 and When the angle between the horizontal planes, the output soil weight G S ,

[0068] The self-weight of the soil body G S Input the subgrade structure design model, and output the minimum design parameters of a single prestressed anchor cable 5;

[0069] The final size parameters o...

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Abstract

The invention relates to the field of subgrade engineering, in particular to the anti-arch subgrade structure, construction and design method of the ballastless track in the cutting section. The vertical arm plate is used to block the slope soil on the corresponding side of the cutting, and at least one side of the bearing plate protrudes from the corresponding vertical arm plate and extends into the corresponding side slope In the soil, the bearing plate is connected with a prestressed anchor cable, the bottom of the prestressed anchor cable extends into the bearing layer, the bottom of the bearing plate is provided with an elastic compression layer, at least one of the prestressed anchor cables runs through the The elastic compression layer. The anti-arch subgrade structure of the ballastless track in the cutting section according to the present invention can effectively control the arching deformation of the ballastless track in the deep cutting section of soft rock, and at the same time ensure the stability of the slope, so as to meet the smoothness and stability of the high-speed railway. Slope stability requirements.

Description

technical field [0001] The invention relates to the field of roadbed engineering, in particular to an anti-arching roadbed structure, construction and design method of a ballastless track in a cutting section. Background technique [0002] With the rapid development of my country's high-speed railways, it is inevitable to encounter soft rock deep cut sections during the construction process. The soft rock deep cut sections include the foundation and the slope soil on both sides of the foundation. The upper arch soft rock layer and bearing layer. Soft rock generally has the properties of water swelling and unloading rheology, both of which will lead to the emergence of subgrade arching diseases to a certain extent, seriously threatening the operation safety of high-speed railways. Moreover, the ballastless track of the high-speed railway has extremely strict control over the deformation of the subgrade, the adjustable amount of the track fasteners is small, and it is difficul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B2/00
CPCE01B2/00
Inventor 周和祥余雷吴沛沛李宁付铭川周成胡超曾永红龚建辉肖昌睿陈伟志周川滨张耀
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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