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Method for building over loading railway road-bed on salting ground

A technology for railway subgrade and saline soil, applied in soil protection, roads, roads, etc., can solve problems such as low cost, and achieve the effects of low cost, reduced engineering cost, and shortened construction period

Inactive Publication Date: 2008-08-20
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0006] For this reason, for many years there has been an unmet construction need to build strong, durable, heavy-haul railway embankments in saline lands at low cost

Method used

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  • Method for building over loading railway road-bed on salting ground

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Embodiment Construction

[0022] Please refer to Fig. 1, the method for building heavy-duty railway embankment 1 in saline soil zone of the present invention comprises the following steps:

[0023] First, reinforce the soft soil of foundation 11:

[0024] The saline soil zone is mostly soft soil. Due to the low strength, high compressibility and large void ratio of the soft soil, its foundation stability coefficient and post-construction settlement value cannot meet the construction requirements, so it is necessary to take reinforcement measures for it.

[0025] The specific reinforcement measures are mainly to apply bagged sand wells (not shown), that is, sandbags are inserted into the conduits so that they can be inserted into the foundation 11 along with the conduits, and then the conduits are pulled out to form bagged sand wells. Those skilled in the art can understand that the diameter, layout, number of sand wells, etc. of the bagged sand wells need to be selected according to different topograph...

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Abstract

The invention relates to a method for constructing the roadbeds of heavy haul railways in saline ground areas, comprising the following steps: packaged sand drain method is adopted to reinforce and tightly compact the saline ground where a foundation is constructed; a first sand bedding is paved, and a first waterproof layer made by two cloth-a film earthwork synthetic materials is then paved on the first sand bedding; earth is taken around the foundation, and the roadbed body is constructed by the taken earth; revetments are arranged at both sides of the roadbed body, and mortar flag stones with drainage ditches are arranged on the revetments; a second sand bedding is paved on the upper surface of the roadbed body, and a second waterproof layer made by two cloth-a film earthwork synthetic materials is then paved on the second sand bedding; stop blocks with drain holes for roadbeds are respectively constructed at both ends of the tops of the roadbed body; a third sand bedding is paved on the second waterproof layer. The method for constructing the roadbeds of heavy haul railways in saline ground areas breaks through the traditional construction technology and provides guarantee for the improvement of the operation.

Description

technical field [0001] The invention relates to a method for building a heavy-duty railway roadbed in a saline soil zone. Background technique [0002] As we all know, part of the eastern coastal area of ​​my country is saline soil. Because saline soil is highly corrosive, it is easy to cause soft foundation and muddy road surface, which is extremely harmful to the foundation of the project. Therefore, building a roadbed in a saline soil zone will easily damage the roadbed due to the characteristics of the saline soil itself. [0003] In fact, the three-phase composition of saline soil is different from that of ordinary soil. The liquid phase contains salt solution, and the solid phase contains crystalline salt, especially soluble crystalline salt. Their phase transformation affects most of the physical indicators of the soil. For example, after the salt in the saline soil is dissolved in water, the physical and mechanical properties of the soil will change, and its strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B2/00E01C3/00E02D3/02E02D3/08E01B1/00
Inventor 薛继连刘放民薄长顺冯鑫彭泽仁薛幸民刘天明
Owner CHINA SHENHUA ENERGY CO LTD
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