裂隙密度对黄土抗剪强度影响的试验研究
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作者单位:

1.长安大学;2.陕西核工业工程勘察院有限公司

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中图分类号:

TU411.7

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Experimental study on shear strength of fissured loess
Author:
Affiliation:

1.Chang’an University;2.Shaanxi Nuclear Industry Engineering Survey Institute Co,Ltd

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    黄土中节理裂隙十分发育,严重影响黄土的力学性质。尤其是对地下采煤引发的黄土滑坡进行评价时,除了需要考虑采矿引起的斜坡变形,还需考虑采煤引起的黄土裂隙化导致的强度劣化问题。本文通过三轴压缩试验研究不同裂隙密度的黄土在不同含水率下的抗剪强度参数变化规律。研究表明:随着裂隙密度的增加,内摩擦角呈明显减小趋势;粘聚力在低含水率下呈减小趋势,在高含水率条件下变化规律不明显。

    Abstract:

    Fissures in loess are very common, and seriously affect the mechanical properties of loess. In addition to considering the slope deformation caused by mining, the strength deterioration reduced by the fissures in loess must be emphasized during the analysis of the loess landslides caused by underground mining. In this paper, the shear strength of loess with different density of fissure and different moisture content was studied by triaxial compression test. The research shows that: with the increase of fissure density, the friction angle decreases obviously; the cohesive decreases at low moisture content, and the change law is not obvious under high moisture content.

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引用本文

成玉祥,曹宝宝,张大伟. 裂隙密度对黄土抗剪强度影响的试验研究[J]. 科学技术与工程, 2019, 19(28): 284-289.
CHENG Yuxiang, CAO Baobao, ZHANG Dawei. Experimental study on shear strength of fissured loess[J]. Science Technology and Engineering,2019,19(28):284-289.

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历史
  • 收稿日期:2019-03-26
  • 最后修改日期:2019-05-14
  • 录用日期:2019-05-28
  • 在线发布日期: 2019-11-20
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