| 关于三轴试验破裂角的试验论证与探讨 |
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| 引用本文： | 谭凡,黄斌,饶锡保,左永振.关于三轴试验破裂角的试验论证与探讨[J].西北地震学报,2011,33(Z1). |
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| 作者姓名： | 谭凡 黄斌 饶锡保 左永振 |
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| 作者单位： | 长江科学院土工研究所,湖北武汉430010;水利部岩土力学与工程重点实验室,湖北武汉430010 |
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| 摘 要： | 目前不同排水条件下的三轴试验中试样的剪切破裂角的计算方法存在用有效应力内摩擦角还是用总应力内摩擦角计算的争议。本文首先通过三轴UU、CU及CD试验对破裂角与内摩擦角之间的关系进行了论证,然后展开理论分析与探讨,并对三轴试验强度包线的确定存在的问题进行了讨论。结果表明:同一饱和土样在不同类型的三轴试验中破裂角与由有效应力指标计算的破裂角基本相等,试样的破裂角应由有效应力强度指标确定;三轴UU试验采用最大剪应力作为不排水强度是偏危险的,CU试验采用总应力摩尔圆公切线确定的强度参数与用实际剪切面确定的参数差别较小。
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| 关 键 词： | 三轴试验 破裂角 总应力 有效应力 内摩擦角 |
Experimental Proof and Discuss on Rupture Angle of Triaxial Test |
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| TAN Fan,HUANG Bin,RAO Xi-bao,ZUO Yong-zhen.Experimental Proof and Discuss on Rupture Angle of Triaxial Test[J].Northwestern Seismological Journal,2011,33(Z1). |
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| Authors: | TAN Fan HUANG Bin RAO Xi-bao ZUO Yong-zhen |
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| Institution: | TAN Fan 1,2,HUANG Bin 1,RAO Xi-bao 1,ZUO Yong-zhen 1,2(1.Geotechnical Division of Yangtze River Scientific Research Institute,Wuhan 430010,China,2.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,China) |
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| Abstract: | The controversy about rupture angle of sample should be calculated by the effective stress internal friction angle or by the total stress internal friction angle in triaxial tests with different drain conditions has been existent.In this paper,the relationship between rupture angle and internal friction angle is proved first by triaxial tests with conditions of unconsolidated-undrained,consolidated-undrained and consolidated-drained.Then the mechanism of rupture angle is analyzed and the problems in strengt... |
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| Keywords: | Triaxial test Rupture angle Total stress Effective stress Internal friction angle |
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