| 原状非饱和黄土的三轴试验研究 |
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| 引用本文： | 李永乐,张红芬,佘小光,侯进凯,杨利乐.原状非饱和黄土的三轴试验研究[J].岩土力学,2008,29(10):2859-2863. |
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| 作者姓名： | 李永乐 张红芬 佘小光 侯进凯 杨利乐 |
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| 作者单位： | 1.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；2.华北水利水电学院，郑州 450008 |
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| 基金项目： | 中国科学院重点实验室基金，河南省教育厅自然科学基金 |
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| 摘 要： | 利用特制的非饱和土三轴仪器，对不同含水量条件下原状非饱和黄土的强度和土-水特征曲线进行了试验研究。试验结果表明：非饱和黄土的抗剪强度随着含水量的不同而不同，含水量越大，非饱和黄土的基质吸力就越小，抗剪强度亦越小。含水量趋于饱和时，非饱和黄土的抗剪强度值逐渐接近于饱和黄土的强度值。原状非饱和黄土的抗剪强度均高于饱和黄土的抗剪强度。非饱和黄土的内摩擦角受含水量的影响不大。凝聚力受含水量的影响很大，含水率越大，基质吸力越小，总凝聚力越小。根据实验结果，提出了非饱和土的抗剪强度模型，该模型易于确定，与实测基本吻合，误差较小，满足非饱和黄土的强度计算要求。
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| 关 键 词： | 非饱和黄土 基质吸力 三轴试验 抗剪强度 土水特征曲线 |
| 收稿时间： | 2007-09-10 |
Experimental study of triaxial test of undisturbed unsaturated loess |
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| LI Yong-le,ZHANG Hong-fen,SHI Xiao-guang,HOU Jin-kai,YANG Li-le.Experimental study of triaxial test of undisturbed unsaturated loess[J].Rock and Soil Mechanics,2008,29(10):2859-2863. |
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| Authors: | LI Yong-le ZHANG Hong-fen SHI Xiao-guang HOU Jin-kai YANG Li-le |
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| Institution: | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2.North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450008, China |
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| Abstract: | With triaxial apparatus specially made for unsaturated soil,the tests of shear strength and soil-water characteristic curve of unsaturated loess under different water contents are performed.The test data show that the shear strength of unsaturated is bigger than that of saturated loess;and it decreases with increasing water contents and lessening matric suction,and vice versa.The shear strength of unsaturated loess will be close to that of saturated loess when water content is saturated.The internal frictio... |
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| Keywords: | unsaturated loess matric suction triaxial test shear strength soil water characteristic curve |
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