| 非饱和土抗剪强度的研究 |
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| 引用本文： | 黄润秋,吴礼舟. 非饱和土抗剪强度的研究[J]. 成都理工大学学报(自然科学版), 2007, 34(3): 221-224 |
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| 作者姓名： | 黄润秋 吴礼舟 |
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| 作者单位： | 成都理工大学"地质灾害防治与地质环境保护"国家重点实验室,成都,610059;成都理工大学"地质灾害防治与地质环境保护"国家重点实验室,成都,610059 |
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| 摘 要： | 非饱和土强度一直倍受理论界和工程界的广泛关注.该文比较Bishop和Fredlund等常见的非饱和土强度公式的优缺点.基于Mohr-Coulomb准则,通过一种有效应力和土水特征曲线推导出一种新的非饱和土强度公式.该式既考虑吸力对强度的贡献,也兼顾了饱和度对强度的影响.由GDS三轴仪进行了非饱和膨胀土的剪切试验,并与相关的试验进行比较,结果表明该非饱和土强度公式是合理和有效的.
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| 关 键 词： | 非饱和土强度 膨胀土 土水特征曲线 有效应力 |
| 文章编号： | 1671-9727（2007）03-0221-04 |
| 修稿时间： | 2006-07-28 |
Study on the shear strength of unsaturated expansive soils |
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| HUANG Run-qiu,WU Li-zhou. Study on the shear strength of unsaturated expansive soils[J]. Journal of Chengdu University of Technology: Sci & Technol Ed, 2007, 34(3): 221-224 |
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| Authors: | HUANG Run-qiu WU Li-zhou |
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| Affiliation: | National Laboratory of Geological Hazard Prevention and Geological Environment Protection, Chengdu University of Technology, Chengdu 610069, China |
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| Abstract: | The shear strength of unsaturated soils has attracted much attention from the fields of engineering and theory.The paper compares several kinds of the shear strength equations of unsaturated soil including Bishop's and Fredlund's.Based on Mohr-Coulomb criteria,the paper utilizes a kind of effective stress of unsaturated soils and soil-water characteristic curve(SWCC) to develop a new shear strength equation of unsaturated soils.The shear strength equation can consider the effects of both suction and the degree of saturation on the strength.Finally shear tests of unsaturated expansive soils are made by the GDS triaxial apparatus, and the tested results are compared with other correlative tested results.The results indicate that the new shear strength is rational and effective. |
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| Keywords: | shear strength of unsaturated soils expansive soil soil-water characteristic curve(SWCC) effective stress |
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