| 高围压下冻结砂土的强度特性 |
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| 引用本文： | 马巍,吴紫汪.高围压下冻结砂土的强度特性[J].冰川冻土,1996,18(3):268-272. |
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| 作者姓名： | 马巍 吴紫汪 |
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| 作者单位： | 中国科学院兰州冰川冻土研究所冻土工程国家重点实验室， |
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| 摘 要： | 在高围压条件下，对冻结兰州砂土在不同温度和不同应变速度下进行三轴压缩试验，试验结果表明，围压的增大和应变速度的减小明显增强了冻土的塑性性能；同时，随围压的增大，冻土的抗剪强度增加，但随围压的进一步增加，它出现降低的趋势，存在一个临界 围压，此临界围压值随温度的变化而变化，但不随应变速率而变化。
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| 关 键 词： | 高围压 冻土 强度 冻结砂土 |
Strength Characteristics of Frozen Sandy Soil under High Confining Pressure |
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| Ma Wei,Wu Ziwang,Chang Xiaoxiao and Sheng Yu.Strength Characteristics of Frozen Sandy Soil under High Confining Pressure[J].Journal of Glaciology and Geocryology,1996,18(3):268-272. |
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| Authors: | Ma Wei Wu Ziwang Chang Xiaoxiao and Sheng Yu |
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| Abstract: | Under high confining pressure, triaxial compressive tests on frozen Lanzhou sandy soil are performed at different temperatures and strain rates. It is revealed that plasticity is strengthened obviously with the increase of confining pressure or decrease of strain rate. The shear strength of frozen sandy soil increases with increase of confining pressure, but decreases gradually with further increase of confining pressure. There exists a critical confining pressure, which changes with temperature but does not change with strain rate. The shear strength of frozen sandy soil increases with decrease of temperature or increase of strain rate. |
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| Keywords: | high confining pressure frozen soil strength |
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