| 基于平面应变试验的非饱和膨胀土强度分析 |
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| 引用本文： | 安骏勇,蒋刚,王钊.基于平面应变试验的非饱和膨胀土强度分析[J].岩土力学,2007,28(12):2649-2651. |
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| 作者姓名： | 安骏勇 蒋刚 王钊 |
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| 作者单位： | 1.中国科学院 武汉岩土力学研究所，武汉，430071；2南京工业大学 土木工程学院，南京，210009;3.武汉大学 土木建筑学院，武汉，430072 |
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| 摘 要： | 介绍了非饱和土强度理论的研究现状，总结了FREDLUND提出的吸力内摩擦角 的性质与规律研究，根据FREDLUND非饱和土强度理论和吸力内摩擦角 的计算方法，利用原状膨胀土的平面应变等应力比卸荷试验，分析得到土样破坏时应力状态下得到的吸力内摩擦角 > ，与FREDLUND提出的吸力内摩擦角 的变化规律不一致，分析认为，是由于卸荷试验过程导致微裂隙的张开，引起基质吸力的降低，有待于继续深入研究。
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| 关 键 词： | 非饱和土强度 吸力 平面应变 吸力内摩擦角 |
| 文章编号： | 1000-7598-（2007）12-2649-04 |
| 收稿时间： | 2006-08-18 |
| 修稿时间： | 2006年8月18日 |
Analysis of shear strength of unsaturated expensive soil under plane strain test |
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| AN Jun-yong,JIANG Gang,WANG Zhao.Analysis of shear strength of unsaturated expensive soil under plane strain test[J].Rock and Soil Mechanics,2007,28(12):2649-2651. |
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| Authors: | AN Jun-yong JIANG Gang WANG Zhao |
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| Affiliation: | 1.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;2.College of Civil Engineering, Nanjing University of Technology, Nanjing 210009,China;3.School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China |
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| Abstract: | The state-of-art of unsaturated soils strength and the angle of internal friction with matric suction indicated by Fredlund are introduced; and the law of is analyzed. With the test results of plane strain constant stress ratio-unloading of undisturbed expansive soils, the angle of internal friction with matric suction calculated by Fredlund’s method is great than the effective angle of internal friction . The result is not accord with Fredlund’s theory; the reason is that micro- crannies were puffed during unloading test so sa to reduce the matric suction. More experiments analysis must be taken. |
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| Keywords: | unsaturated soils strength matric suction plane strain angle of internal friction with matric suction |
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