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Filling construction method for collapsible loess subgrade

A technology of collapsible loess and construction method, applied in the direction of roads, buildings, tracks, etc., to achieve the effect of ensuring stability, high safety reserves, and reducing settlement

Active Publication Date: 2015-02-18
CHINA RAILWAY NO 8 ENG GRP CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to provide a collapsible loess subgrade filling construction method for the above-mentioned existing problems, which mainly solves the technical problem of how to carry out reasonable filling construction under the drought conditions in Northwest China. The continuous compaction technology is used as an auxiliary means of quality control during the roadbed filling process, which further ensures the quality of the roadbed filling construction, can reduce the later settlement, and can obtain a higher safety reserve to ensure the stability of the roadbed and ensure that no diseases occur

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  • Filling construction method for collapsible loess subgrade
  • Filling construction method for collapsible loess subgrade

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[0018] 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.

[0019] 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.

[0020] Such as figure 1 Shown, the collapsible loess roadbed filling construction method of the present invention.

[0021] First of all, it is necessary to select the subgrade filler. Taking the Lanzhou-Xinjiang Railway Ganqing Section as an example, the LXS-9 standard roadbed of the Lanzhou-Xinjiang Railway Ganqing Section is 40.601km, accounting for 50.6% of the length of the line. , of which 3.65 million square meters are filled.

[0022] Among them, the fill...

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Abstract

The invention discloses a filling construction method for a collapsible loess subgrade, and belongs to the technical field of construction of railway subgrades. The filling construction method for the collapsible loess subgrade comprises the following steps of 1, finishing foundation treatment on a collapsible loess subgrade foundation by combining CFGs (cement flyash gravel pile) and water soil compaction piles; 2, laying a 1m-thick water soil cushion layer on the top surface of the foundation, wherein two layers of geogrids with tensile strength of not weaker than 120KN / m in the water soil cushion layer; 3, after the filling construction of a part (3) below the foundation, adjusting the width of the subgrade and the slope of side slopes according to needs, removing redundant filled soil, and compacting the side slopes. According to the filling construction method for the collapsible loess subgrade, the technical problem of how to implement reasonable filling construction under a dry condition in a northwest region is mainly solved, and a continuous compaction technology is adopted for a filling construction process for the collapsible loess subgrade as an auxiliary quality control means.

Description

technical field [0001] The invention relates to the technical field of railway embankment construction, in particular to a filling construction method for railway collapsible loess embankment. 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 l...

Claims

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Application Information

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IPC IPC(8): E01B2/00
CPCE01B2/00E01B2/006E01B2204/01E01B2204/08
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
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