Production method of gravelly soil

A production method and gravel soil technology, applied in chemical instruments and methods, clay preparation equipment, clay processing equipment, etc., can solve the problems of low fine particle content, high fine particle content, and strength that cannot meet the stress and deformation requirements of high dams, etc. Achieve effective utilization, high production efficiency and high pass rate

Inactive Publication Date: 2015-11-25
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Description
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Problems solved by technology

However, the natural graded gravel soil has the disadvantage that the content of fine particles is too small, and the anti-seepage and impermeability performance cannot fully meet the requirements; or the content of fine particles is too high, and the strength cannot meet the stress and deformation requirements of high dams

Method used

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  • Production method of gravelly soil
  • Production method of gravelly soil
  • Production method of gravelly soil

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Experimental program
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Embodiment

[0045] The soil material in a certain stockyard is mainly glaciation-accumulated gravel-containing soil, and a small amount is slope-diluvial accumulation. Exploration shows that the soil P in the stockyard 5 Coarse material with a content greater than 50% is about 1.1 million m 3 , P 5 The fine material with a content of less than 30% is about 500,000 m 3 , Coarse material and fine material account for 35% of the total reserves.

[0046] a, with P 5 Continuously graded natural soil materials with a content of 50% to 65% are used as coarse materials, and P 5 Continuously graded natural soil materials with a content of less than 35% are used as fine materials; the soil materials in the stockyard are mined in layers from top to bottom according to the coarse material area and the fine material area. layer excavation;

[0047]b. Sieve the mined coarse and fine materials through a simple bar sieve or a vibrating bar sieve, and remove super-diameter boulders with a particle s...

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Abstract

The invention discloses a production method of gravelly soil; and the method can produce the gravelly soil satisfying the engineering requirements of earth and rockfill dams. Firstly, particles with particle sizes more than 150 mm in continuous-graded coarse and fine materials are eliminated; then, the thickness of a fine material layer is calculated by a specific formula according to the thickness of a coarse material layer to determine a ratio of the coarse materials to the fine materials; and finally, a blending machine is used for blending a mixture to obtain the gravelly soil with P5 content of 30-50% so as to satisfy the engineering requirements of earth and rockfill dams. The method produces the gravelly soil, and is higher in production efficiency and pass percent.

Description

technical field [0001] The invention relates to a production method, in particular to a production method of gravel soil material. Background technique [0002] Engineering practice shows that gravel soil is used more and more widely in earth-rockfill dam engineering as the anti-seepage material of high earth core rockfill dams. Most of the high earth core rockfill dams with a dam height of more than 200m that have been built or are under construction in the world basically use wide-graded gravel soil as the anti-seepage material. my country's "Code for Design of Roller-Compacted Earth-rock Dams" (DL / T5395-2007) stipulates that the gravel soil (including artificially mixed gravel soil) used for the anti-seepage body of the core wall should meet the following requirements: 1), the maximum The particle size is not greater than 150mm or 2 / 3 of the thickness of the soil; 2), P 5 The content, that is, the content of particles with a particle size greater than 5mm, should not be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C1/20B28C3/00
CPCB28C1/203B28C3/00
Inventor 何顺宾张丹叶发明伍小玉王晓东甘霖杨星胡金山贺溪
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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