| 呼伦贝尔沙质草原表土物理力学性质 |
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| 引用本文： | 殷玲,张德平,成永会,靳立宁,赵家明,巴日斯,海军,祁晓燕,屈建新.呼伦贝尔沙质草原表土物理力学性质[J].中国沙漠,2015,35(4):930-936. |
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| 作者姓名： | 殷玲 张德平 成永会 靳立宁 赵家明 巴日斯 海军 祁晓燕 屈建新 |
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| 作者单位： | 1. 呼伦贝尔学院 建筑工程学院, 内蒙古 呼伦贝尔 021008;
2. 呼伦贝尔市水利局, 内蒙古 呼伦贝尔 021008;
3. 呼伦贝尔大地岩土工程勘察有限公司, 内蒙古 呼伦贝尔 021008;
4. 呼伦贝尔市生态环境监测站, 内蒙古 呼伦贝尔 021008;
5. 呼伦贝尔市国土资源信息中心, 内蒙古 呼伦贝尔 021008;
6. 呼伦贝尔学院 草原生态研究院, 内蒙古 呼伦贝尔 021008 |
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| 基金项目： | 国家自然科学基金项目(40961010);内蒙古自治区交通运输科技项目(NJ-2013-25) |
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| 摘 要： | 通过野外现场调查、载荷试验、轻型圆锥动力触探及室内试验,对呼伦贝尔沙质草原厚度30 cm的表层沙土物理力学性质及承载力、剪切变形特征进行研究。结果表明:表层沙土工程分类为细砂,颗粒级配不良,沿深度有明显分层;干密度1.34～1.51 g·cm-3,黏聚力12～27.4 kPa,内摩擦角22.5°～24.0°,变形模量8.5 MPa;各指标表明沙土的工程性质上部差于下部;沙土承载力特征值和极限承载力分别为150 kPa和300 kPa,承载力不足导致表层沙土发生冲剪破坏(塑性破坏)和整体剪切破坏(脆性破坏)。
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| 关 键 词： | 表土层 承载力 越野交通 风蚀坑 沙漠化 |
| 收稿时间： | 2014-04-13 |
| 修稿时间： | 2014-06-22 |
Top Soil Texture,Physical and Mechanical Property of the Hulunbuir Sandy Grassland,Inner Mongolia,China |
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| Yin Ling,Zhang A. MunkhDalai,Cheng Yonghui,Jin Lining,Zhao Jiaming,Barisi,Hai Jun,Qi Xiaoyan,Qu Jianxin.Top Soil Texture,Physical and Mechanical Property of the Hulunbuir Sandy Grassland,Inner Mongolia,China[J].Journal of Desert Research,2015,35(4):930-936. |
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| Authors: | Yin Ling Zhang A MunkhDalai Cheng Yonghui Jin Lining Zhao Jiaming Barisi Hai Jun Qi Xiaoyan Qu Jianxin |
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| Abstract: | Research into topsoil texture, physical and mechanical properties within the depth of thirteen centimeters has been carried out based on field survey and laboratory tests on bearing capacity and shear deformation analysis in the sandy grassland of Hulunbuir, Inner Mongolia. It is discovered that the topsoil could be named fine sand, with poor grain size distribution, and layered structure. Soil dry density is between 1.34 g·cm-3 and 1.51 g·cm-3, soil cohesive forces between 12 kPa and 27.4 kPa, soil internal friction angle falls between 22.5° and 24°, and soil modulus of deformation is 8.5 MPa. It was discovered that the soil engineering property of the lower bed is better. Top soil characteristic value of bearing capacity was 150 kPa, and its ultimate bearing capacity was 300 kPa. Punching shear destruction (The plastic damage) and General shear failure(Brittle failure)is usual as soil carrying capacity is weak. |
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| Keywords: | topsoil mantle bearing capacity off road vehicle traffic blowout sandy desertification |
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