| 非饱和粉土静、动强度对比试验研究 |
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| 引用本文： | 杨庆,王猛,栾茂田,刘功勋.非饱和粉土静、动强度对比试验研究[J].岩土力学,2010,31(1):71-75. |
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| 作者姓名： | 杨庆 王猛 栾茂田 刘功勋 |
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| 作者单位： | 大连理工大学,海岸和近海工程国家重点实验室,大连,116024;大连理工大学,土木水利学院岩土工程研究所,大连,116024 |
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| 摘 要： | 针对非饱和重塑粉土,利用改进的可控制吸力式非饱和土静力-动力液压三轴-扭转多功能剪切仪,进行了多组固结排水非饱和土静、动三轴试验,探讨了非饱和粉土静、动强度特性,分析了粉土静三轴强度随固结压力、吸力变化的规律,以及动强度随固结压力、吸力以及破坏振动次数变化的规律,研究表明粉土静、动强度之间具有很强的相关性。最后,通过归一化处理提出了利用粉土的静三轴强度推求相应的动力强度曲线的公式,从而达到在非饱和土地基稳定性分析中减少工作量的目的。
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| 关 键 词： | 非饱和 粉土 基质吸力 循环荷载 三轴试验 动强度 |
| 收稿时间： | 2008-05-23 |
Experimental research of correlation on static and dynamic strength of unsaturated silty clay |
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| YANG Qing,WANG Meng,LUAN Mao-tian,LIU Gong-xun.Experimental research of correlation on static and dynamic strength of unsaturated silty clay[J].Rock and Soil Mechanics,2010,31(1):71-75. |
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| Authors: | YANG Qing WANG Meng LUAN Mao-tian LIU Gong-xun |
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| Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 2. Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | The improved static and dynamic universal triaxial and torsional shear apparatus for unsaturated silty is employed to perform matric suction controlled cyclic triaxial tests under consolidated drained condition. Through a series of static and dynamic triaxial tests on unsaturated remoulded slity clay. The characteristics of static and dynamic strength of unsaturated silty clay are studied. The rules that static strength of silty clay changes with confining pressure and matric suction, and dynamic strength changes with confining pressure and matric suction and number of cycles are also analyzed. Moreover, it is verified that the correlation of strength between static and dynamic test of unsaturated silty clay is remarkable. Finally, some experience formulas of ascertaining dynamic strength curve according to static strength are presented by normalizating test data, so as to reduce the workload for analyzing of stability on unsaturated foundations. |
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| Keywords: | unsaturated silty matric suction cyclic loading triaxial test dynamic strength |
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