| Q2黄土的非饱和直剪试验研究 |
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| 引用本文： | 申春妮,方祥位,陈正汉. Q2黄土的非饱和直剪试验研究[J]. 地下空间与工程学报, 2010, 6(4) |
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| 作者姓名： | 申春妮 方祥位 陈正汉 |
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| 作者单位： | 重庆科技学院建筑工程学院,重庆,401331;后勤工程学院建筑工程系,重庆,401311;重庆交通科研设计院,重庆,400067;后勤工程学院建筑工程系,重庆,401311 |
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| 基金项目： | 重庆市自然科学基金计划资助项目 |
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| 摘 要： | 改进了后勤工程学院研制的国内第一台非饱和土直剪仪,升级为四联非饱和土直剪仪。四联非饱和土直剪仪极大的缩短了试验时间,提高了效率。利用该仪器研究了原状、重塑非饱和Q2黄土的抗剪强度特性。试验结果表明,在试验研究的吸力范围内,原状、重塑Q2黄土的凝聚力均随吸力线性增加,内摩擦角随吸力的变化较小,可以认为是一常数;吸力摩擦角较大,说明Q2黄土的抗剪强度受吸力变化影响较大,也即受含水率变化影响较大。原状Q2黄土的抗剪强度大于重塑Q2黄土,随着吸力增大,结构性增强。
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| 关 键 词： | 四联非饱和土直剪仪 Q2黄土 非饱和土 直剪 强度 |
The Unsaturated Direct Shear Tests of Q2 Loess |
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| Shen Chunni,Fang Xiangwei,Chen Zhenghan. The Unsaturated Direct Shear Tests of Q2 Loess[J]. Chinese Journal of Underground Space and Engineering, 2010, 6(4) |
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| Authors: | Shen Chunni Fang Xiangwei Chen Zhenghan |
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| Affiliation: | Shen Chunni1,Fang Xiangwei2,3,Chen Zhenghan2 (1.School of Civil Engineering and Architecture,Chongqing University of Science and Technology,Chongqing 401331,China,2.Department of Architecture and Civil Engineering,Logistical Engineering University,Chongqing 401311,3.Chongqing Communications Research & Design Institute,Chongqing 400067) |
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| Abstract: | The direct shear apparatus for unsaturated soils developed in Logistical Engineering University,China was improved to quadruplet direct shear apparatus for unsaturated soils.The quadruplet direct shear apparatus of unsaturated soils shortened the test time.The direct shear tests with controlled suction were conducted to study the shear strength of unsaturated intact and remolded Q2 loess using improved quadruplet direct shear apparatus of unsaturated soils.The test results show that the cohesions of unsatur... |
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| Keywords: | quadruplet direct shear apparatus for unsaturated soils Q2 loess unsaturated soil direct shear strength |
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