Anti-upheaval structure of ballastless track tramcar in strong expansive soil or expansive rock section

A ballastless track and tram technology, applied in the field of strong expansive soil or expansive rock engineering, can solve the problems of poor reinforcement effect of anchor cables or bolts, and the foundation bed is affected by groundwater fluctuations. Good building effect and stable filler properties

Pending Publication Date: 2020-06-19
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide strong expansive soil or Anti-uplift structure of ballastless track and tram in expansive rock section

Method used

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  • Anti-upheaval structure of ballastless track tramcar in strong expansive soil or expansive rock section
  • Anti-upheaval structure of ballastless track tramcar in strong expansive soil or expansive rock section

Examples

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Embodiment

[0027] Such as Figure 1-2 As shown, this embodiment provides an anti-uplift structure for a ballastless track tram in a section of strong expansive soil or expansive rock, including a track structure 1, a subgrade bottom layer 2, a replacement layer 3, a deep drainage blind ditch and a composite waterproof and drainage layer.

[0028] The base layer 2 is located on the strong expansive soil or expansive rock foundation 6, and the track structure 1 is located on the base layer 2.

[0029] During the construction process, the depth of the layer strongly affected by the atmosphere is determined according to the depth of the geological body at the construction site.

[0030] The replacement layer 3 is filled on the strong expansive soil or expansive rock foundation 6 and is located below the layer strongly affected by the atmosphere. The filler in Group A of the bottom layer of the bed adopts gravel soil and gravel soil with good gradation and fine particle content less than 15%...

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PUM

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Abstract

The invention discloses an anti-upheaval structure of a ballastless track tramcar in a strong expansive soil or expansive rock section. The structure comprises a replacement filling layer, a compositewaterproof and drainage layer and a deep drainage blind ditch, wherein the replacement filling layer is filled on strong expansive soil or expansive rock foundation, a subgrade bed bottom layer groupA filler and a subgrade bed bottom layer group B filler are adopted in the replacement filling layer, and a composite waterproof and drainage layer is located between the replacement filling layer and the strong expansive soil or the expansive rock foundation and used for guiding the underground water into a deep drainage blind ditch. The structure is advantaged in that the strong expansive soilor expansive rock with high expansibility and super-consolidation property is filled in the subgrade bed bottom layer group A filler and the subgrade bed bottom layer group B filler, when meeting thewater or excavating road cutting, the upwarp force and the deformability can be reduced, certain stability is realized, the underground water is guided into the deep drainage blind ditch in time through the composite waterproof and drainage layer, the underground water is prevented from permeating into the strong expansive soil or the expansive rock to cause upheaval, an upheaval problem caused bywater swelling of the strong expansive soil or expansive rock is effectively solved, the requirement for smoothness is met, the structure is safe and reliable, and construction is convenient and fast.

Description

technical field [0001] The invention relates to the field of strong expansive soil or expansive rock engineering, in particular to an anti-uplift structure for a ballastless track tram in a section of strong expansive soil or expansive rock. Background technique [0002] Strong expansive soil or expansive rock has strong expansibility and super-consolidation, and will generate a large upward arching force when encountering water or cutting unloaded excavation. Construction will face a technical problem. [0003] In the prior art, when the ballastless track of the tram passes through the expansive soil or expansive rock section, anchor cables and bolts are generally used to reinforce the foundation, but when the expansion force is large and the groundwater level is shallow, it will face The reinforcement effect is not good, and the foundation bed is affected by groundwater fluctuations. Contents of the invention [0004] The purpose of the present invention is to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B1/00E01B2/00
CPCE01B1/00E01B1/008E01B2/00E01B2/006
Inventor 谯春丽薛元蒋恒王智猛姜瑞雪刘菀茹张东卿
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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