Chemical improving method using soft rock weathered material as high-speed railway subgrade filler

A high-speed railway and subgrade filling technology, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as waste, and achieve the effects of environmental protection, good economy, and reduction of dregs

Inactive Publication Date: 2011-08-17
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Description
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Problems solved by technology

If soft rock weathering is not utilized, it will cause huge waste

Method used

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  • Chemical improving method using soft rock weathered material as high-speed railway subgrade filler
  • Chemical improving method using soft rock weathered material as high-speed railway subgrade filler

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Embodiment Construction

[0019] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. As mentioned above, the present invention provides a method for chemical improvement of weathered soft rock as filler for high-speed railway roadbeds. The weathered soft rocks are improved to meet the standards for roadbed fillers for high-speed railways, thereby reducing engineering costs and reducing Abandon ballast, protect the environment, and achieve good economic, technological, environmental and social benefits.

[0020] The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Such as figure 1 As shown, the chemical improvement method of the weathered soft rock of the present embodiment as high-speed railway embankment filler comprises the following steps:

[0021] Step S101: Select soft rock weathered objects with a breakag...

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Abstract

The invention discloses a chemical improving method using a soft rock weathered material as a high-speed railway subgrade filler, comprising the following steps of: (1) selecting a soft rock weathered material with crushing rate of more than 40% and disintegration rate of less than 30%; (2) making a filler with maximum particle size of less than 40 mm by the soft rock weathered material, wherein the content of particles with particle sizes of 20-40 mm in the filler is less than 20% while the content of the particles with particle sizes of less than 10 mm is more than 60%; (3) adding a doping agent to form improved soil; (4) blending the improved soil until the improved soil is uniformly blended; and (5) carrying out saturated unconfined compressive strength testing on the improved soil for seven days, and if the seven-day saturated unconfined compressive strength of the improved soil is more than 300 kpa, using the improved soil as the high-speed railway subgrade filler. The soft rock weathered material can reach the standard of the high-speed railway subgrade filler after improved by the chemical improving method, and then the engineering cost can be largely reduced, waste materials are reduced, the environment is protected, and finally, good economic, technological, environmental and social benefits are obtained.

Description

technical field [0001] The invention relates to the technical field of high-speed railway embankment construction, in particular to a chemical improvement method for using weathered soft rock as filler for high-speed railway embankment. Background technique [0002] According to the definition in the "Engineering Rock Mass Classification Standard" (GB50218), soft rock refers to rock with a saturated uniaxial compressive strength of 5MPa<Rc≤15MPa. According to the relevant regulations of the current railway regulations, weathered soft rocks belong to Group C~D fillers and cannot be directly used as fillers for high-speed railway subgrades. Soft rocks are widely distributed in my country, and when high-speed railways pass through areas where soft rocks are distributed, a large amount of weathered soft rocks will be produced. If the soft rock weathering is not utilized, it will cause huge waste. Therefore, it is urgent to provide a chemical improvement method for soft rock...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/12
CPCY02W30/91
Inventor 李小和郭建湖蒋兴锟陈占赵勇贾厚华田大鹏管海涛卿启湘
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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