Collapsed loess subgrade base treatment method for railway with speed more than 200km

A technology for collapsible loess and base treatment, which can be used in roads, infrastructure engineering, sheet pile walls, etc., and can solve the problems of difficult settlement control and high settlement requirements.

Active Publication Date: 2015-03-11
CHINA RAILWAY NO 8 ENG GRP CO LTD
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: aim at the above existing problems, to provide a method for treating the subgrade of railway collapsible loess subgrades with a speed of more than 200km, which mainly solves the problem of high settlement requirements after the construction of fast railway subgrades with a speed of more than 200km/h, and the collapsible loess It is generally in a saturated s

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Collapsed loess subgrade base treatment method for railway with speed more than 200km
  • Collapsed loess subgrade base treatment method for railway with speed more than 200km

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0032] Such as figure 1 and figure 2 Shown, the speed 200km above railway collapsible loess subgrade base treatment method of the present invention is applied to the Lanxin second double-track railway subgrade base treatment, adopting many methods such as impact rolling, dynamic compaction, heavy compaction, replacement and so on. In order to better meet the subgrade settlement requirements after subgrade construction in the process of thick layer collapsible loe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Dry densityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a collapsed loess subgrade base treatment method for a railway with speed more than 200km, and belongs to the technical field of railway construction. The collapsed loess subgrade base treatment method for the railway with speed more than 200km comprises the following steps of 1, using two culverts or two bridges as a construction unit; firstly using a cement soil compaction pile to eliminate the collapsibility of the loess on a foundation in a way of first two sides and then middle part and row separation construction; then, adopting a pipe sinking method to form a hole in the cement soil compaction pile; 2, adopting a CFG (cement flyash gravel) pile to reinforce the foundation, wherein the CFG pile is drilled by a long spiral drilling machine; 3, cleaning the soil between the piles, forming a cement bedding layer, testing and checking, and entering the subgrade body filling procedure after qualification is confirmed. The collapsed loess subgrade base treatment method mainly solves the technical problems that the setting requirement is high, the collapsed loess is generally in the saturation state, and the difficulty in control of settling amount is higher after the construction of the subgrade of the railway with speed more than 200km.

Description

technical field [0001] The invention relates to the technical field of railway construction, in particular to a treatment method for railway collapsible loess subgrade base. Background technique [0002] Collapsible loess is formed under arid climate conditions. In the initial stage of formation, a small amount of seasonal rainwater aggregates the loose silt particles, while long-term drought makes the water evaporate continuously, forming a multi-layered loess with coarse silt particles as the main skeleton. Pore ​​Structure. It is characterized by high strength and low compressibility in the natural dry state. Once a large amount of precipitation or channel water infiltrates, various soluble salts in the loess will be dissolved after soaking, and the cementing force in the soil will weaken. Under the joint action of self-weight and a certain load, the soil structure is rapidly destroyed, and the bearing capacity is also sharply reduced, resulting in a large amount of coll...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E01B2/00E02D5/38E02D11/00
CPCE01B2/006E01B37/00E01B2204/08E02D5/385E02D11/00E02D27/34E02D2250/0007E02D2250/003E02D2300/002
Inventor 赵智谢录杲秦瑞谦王智勇龚斯昆白昆华梅红赵代强万轶宋德佩
Owner CHINA RAILWAY NO 8 ENG GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap