| 重塑非饱和黏土脱吸湿抗剪强度对比 |
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| 引用本文： | 温晓鹏,杨庆,杨钢,杨清雷.重塑非饱和黏土脱吸湿抗剪强度对比[J].水利水电科技进展,2011,31(1):70-73. |
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| 作者姓名： | 温晓鹏 杨庆 杨钢 杨清雷 |
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| 作者单位： | 1. 铁道第三勘察设计研究院,天津,300142
2. 大连理工大学岩土工程研究所,辽宁,大连,116023 |
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| 摘 要： | 基于压力板仪与非饱和土直剪仪,针对脱湿与吸湿条件非饱和土的抗剪强度特性进行对比试验研究,探讨不同基质吸力、不同竖向压力下非饱和粉质黏土试样的抗剪强度特性。研究结果表明,抗剪强度与基质吸力成正比;基质吸力的变化对抗剪强度的影响主要表现在对黏聚力的影响,对摩擦角影响不大。进行脱湿与吸湿情况下相同含水率的抗剪强度对比,发现脱湿后试样的抗剪强度高于吸湿试样的抗剪强度;脱湿过程中试样的抗剪强度参数高于吸湿试样的抗剪强度参数。
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| 关 键 词： | 非饱和土 脱湿 吸湿 抗剪强度 基质吸力 |
| 修稿时间： | 2011/2/24 0:00:00 |
Comparison of shear strengths of remolded unsaturated clay under dehydration and moisture absorption |
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| WEN Xiaopeng,YANG Qing,YANG Gang,YANG Qing-lei.Comparison of shear strengths of remolded unsaturated clay under dehydration and moisture absorption[J].Advances in Science and Technology of Water Resources,2011,31(1):70-73. |
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| Authors: | WEN Xiaopeng YANG Qing YANG Gang YANG Qing-lei |
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| Abstract: | By use of the pressure plate extractor and the direct shear apparatus for unsaturated soil,comparative tests on shear strength properties of unsaturated soil under moisture absorption and dehydration conditions were carried out.The shear strengths of unsaturated clay samples with different matric suctions and different vertical pressures were investigated.The test results show that the shear strength is directly proportional to the matric suction.The impact of the variation of the matric suction on the strength is mainly represented by the impact on the cohesion and little impact on the friction angle.Under the same moisture content,the shear strength and shear strength parameters of the specimens with dehydration are higher than those of the specimens with moisture absorption. |
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| Keywords: | unsaturated soil dehydration moisture absorption shear strength matric suction |
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