| 不同应力路径下非饱和黄土的结构变化特性 |
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| 引用本文： | 张腾,胡再强,吴兴辉,陈存礼.不同应力路径下非饱和黄土的结构变化特性[J].岩土力学,2006,27(11):1945-1948. |
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| 作者姓名： | 张腾 胡再强 吴兴辉 陈存礼 |
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| 作者单位： | 西安理工大学 岩土工程研究所，西安 710048 |
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| 摘 要： | 以陕西杨陵非饱和黄土为研究对象，对不同初始含水率的原状黄土及相应的重塑黄土进行不同应力比下的等应力比加载试验，求取非饱和黄土在不同应力状态下的综合结构势参数，研究了黄土在等应力比压缩试验状态下的结构变化特性。结果表明，当初始含水率不变时，应力比(?=?3/?1)对黄土的结构性有较大的影响，表现为应力比愈小，黄土的结构性愈弱；当应力状态不变时，含水率对结构性参数影响明显。含水率愈低，同一应力状态下对应的结构性参数愈大，尤其在低含水率区域，含水率变化强烈影响原状黄土的结构性。
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| 关 键 词： | 非饱和黄土 结构性 应力比 |
| 文章编号： | 1000-7598-（2006）11-1945-04 |
| 收稿时间： | 2005-09-30 |
| 修稿时间： | 2005-12-26 |
Variation characteristics of soil structure of unsaturated loess under different stress paths |
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| ZHANG Teng,HU Zai-qiang,WU Xing-hui,CHEN Cun-li.Variation characteristics of soil structure of unsaturated loess under different stress paths[J].Rock and Soil Mechanics,2006,27(11):1945-1948. |
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| Authors: | ZHANG Teng HU Zai-qiang WU Xing-hui CHEN Cun-li |
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| Institution: | Institute of Geotechnical Engineering，Xi’an University of Technology, Xi’an 710048, China |
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| Abstract: | Taking the unsaturated loess at Yangling in Shaanxi Province as the research object, the compressive tests on different stress paths are made with the intact loess and the corresponding remoulded loess under different water contents. The comprehensive structure potential parameters of unsaturated loess are calculated under different stress conditions. Based on the above, the variation characteristics of structural loess are studied under equal stress ratio condition. The result indicates: when the water content is invariable, the stress ratio(?=?3/?1)influences the structural characteristics of intact loess obviously; the performance is smaller for the stress ratio; the structural characteristics of intact loess is weaker; when the stress ratio is invariable, the water content of intact loess influences the structural parameter obviously. The lower water content, the bigger structural parameter. Especially in the region of low water content, the structural characteristics of unsaturated loess are influenced by the variation of water content strongly. |
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| Keywords: | unsaturated loess structural properties stress ratio |
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