| 剪切速率对结构性黄土力学性质的影响 |
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| 引用本文： | 杨小平,李永红.剪切速率对结构性黄土力学性质的影响[J].西北农业学报,2010,19(3):136-138. |
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| 作者姓名： | 杨小平 李永红 |
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| 作者单位： | 1. 杨凌职业技术学院,陕西杨凌,712100
2. 中国科学院水利部,水土保持研究所,陕西杨凌,712100 |
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| 摘 要： | 以天然黄土为对象,采用在不同含水率和剪切速率下的固结不排水剪(CU)三轴试验,研究剪切速率对结构性黄土力学性质的影响。发现天然黄土的不同力学性状受剪切速率的影响各异。在高剪切速率下,天然黄土的应力应变关系曲线产生应变软化现象;随剪应变率的增大,峰值强度、凝聚力C呈现先增大后减小的特征;但是内摩擦角受剪切速率的增加,其值呈现减少趋势。
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| 关 键 词： | 结构性黄土 剪切速率 剪应变速率 强度指标 |
| 收稿时间： | 2009/11/9 0:00:00 |
| 修稿时间： | 2009/12/2 0:00:00 |
Influence of Shearing Rate on Mechanical Property of Constructional Loess |
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| YANG,Xiaoping,and LI,Yonghong.Influence of Shearing Rate on Mechanical Property of Constructional Loess[J].Acta Agriculturae Boreali-occidentalis Sinica,2010,19(3):136-138. |
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| Authors: | YANG Xiaoping and LI Yonghong |
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| Institution: | YANG Xiaoping1 , LI Yonghong2(1.Yangling Vocational&Technical College,Yangling Shaanxi 712100,China,2.Institute of Soil , Water Conservation,Chinese Academy of Sciences & Ministry of Water Resources,China) |
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| Abstract: | Based on the study of natural loess and consolidation and non-drainage(CU) travail test,it has been found that shearing rate affects mechanical property of natural loess in different degrees.When shearing rate is high,strain curves of natural loess have the phenomenon of strain softening.There is an extreme point among peak strength,cohesion and shearing rate.Peak strength and cohesion increase,then reducing as shear strain rate rises,but the internal friction angle is not affected obviously by shearing rat... |
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| Keywords: | Constructional loess Shearing rate Shear strain rate Strength parameter |
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