| 低饱和度非饱和土的抗剪强度理论及其应用 |
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| 引用本文： | 贾其军,赵成刚,韩子东.低饱和度非饱和土的抗剪强度理论及其应用[J].岩土力学,2005,26(4):580-585. |
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| 作者姓名： | 贾其军 赵成刚 韩子东 |
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| 作者单位： | 1. 北京国道通公路设计研究院，北京 100053；2. 北京交通大学 土木建筑工程学院，北京 100044； 3. 北京中咨华科交通工程技术有限公司，北京 100037 |
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| 摘 要： | 从非饱和土的微观结构入手，提出并推导了土颗粒间毛细吸力引起的基质吸力与附加有效应力关系的近似解，并进一步得到了低饱和度非饱和土的抗剪强度公式。通过试验资料和理论分析验证了所推公式的合理性、正确性。最后分析了土颗粒半径差异、土体平均粒径大小对非饱和土强度的影响。
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| 关 键 词： | 非饱和土 气连通状态 基质吸力 有效应力 抗剪强度 |
| 文章编号： | 1000-7598-(2005)04-0580-06 |
| 收稿时间： | 2004-01-04 |
| 修稿时间： | 2004年1月4日 |
Study on shear strength of the unsaturated soils in pendular state and its application |
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| JIA Qi-jun,ZHAO Cheng-gang,HAN Zi-dong.Study on shear strength of the unsaturated soils in pendular state and its application[J].Rock and Soil Mechanics,2005,26(4):580-585. |
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| Authors: | JIA Qi-jun ZHAO Cheng-gang HAN Zi-dong |
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| Institution: | 1. Beijing Guodaotong Highway Design & Research Institute, Beijing 100053, China; 2. School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China; 3. Beijing Zhong Zi Hua Ke Traffic Engineering Technology co.Ltd, Beijing 100037, China |
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| Abstract: | Based on the micromechanical structure, an approximate equation between the increase of normal stress and suction due to capillarity in unsaturated assemblies of unequal-sized spheres is proposed and derived; and then the shear strength of unsaturated soils in pendular stage is derived also. All the equations derived have been verified by experiments and theoretical analysis. At last, the effect of soil gradation on the shear strength of unsaturated soils is analyzed qualitatively. |
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| Keywords: | unsaturated soils pendular state matric suction effective stress shear strength |
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