| 土壤含水量和植被对浅层滑坡土体抗剪强度的影响 |
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| 引用本文： | 杨永红,刘淑珍,王成华.土壤含水量和植被对浅层滑坡土体抗剪强度的影响[J].灾害学,2006,21(2):50-54. |
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| 作者姓名： | 杨永红 刘淑珍 王成华 |
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| 作者单位： | 1. 西南交通大学,土木工程学院,四川,成都,610031
2. 中国科学院,成都山地灾害与环境研究所,四川,成都,610041 |
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| 基金项目： | 国家重大基础理论研究专项基金 |
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| 摘 要： | 通过对裸地和桉树林地两种土壤在不同土壤含水量、不同深度的非饱和土的直剪试验,研究了植被类型和含水量对非饱和土抗剪强度的影响.结果表明,随着含水量的增加,非饱和土的粘聚力和内摩擦角均减小,粘聚力有较大变化而内摩擦角变化较小,植被具有提高非饱和土抗剪强度的作用.
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| 关 键 词： | 浅层滑坡 含水量 非饱和土 植被 抗剪强度 |
| 文章编号： | 1000-811X（2006）02-0050-05 |
| 收稿时间： | 2006-01-04 |
| 修稿时间： | 2006-01-04 |
Impacts of Soil Moisture Content and Vegetation on Shear Strength of Soil in Surface Landslide |
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| YANG Yong-hong,LIU Shu-zhen,WANG Cheng-hua.Impacts of Soil Moisture Content and Vegetation on Shear Strength of Soil in Surface Landslide[J].Journal of Catastrophology,2006,21(2):50-54. |
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| Authors: | YANG Yong-hong LIU Shu-zhen WANG Cheng-hua |
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| Institution: | 1. School of Civil Engineering, Southwest diaotong University, Chengdu 610031, China; 2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu 610041, China |
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| Abstract: | The authors analyze the impacts of vegetation type and soil moisture content on shear strength of unsaturated soil through direct shearing tests for various vegetation types, different soil moisture contents and different-depth unsaturated soil. The results show that the cohesion of unsaturated soil changes greatly and the friction angle changes a little with soil moisture content. It is also shown that vegetation can improve shear strength of unsaturated soil, which therefore provides a basis that vegetation can reinforce soil and protect slopes. |
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| Keywords: | surface landslide water content unsaturated soil vegetation shear strengh |
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