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不同黏性土的残余强度及其抗剪强度指标特性研究

许成顺, 王馨, 杜修力, 戴福初, 王国盛, 高岩

许成顺, 王馨, 杜修力, 戴福初, 王国盛, 高岩. 不同黏性土的残余强度及其抗剪强度指标特性研究[J]. 岩土工程学报, 2017, 39(3): 436-443. DOI: 10.11779/CJGE201703006
引用本文: 许成顺, 王馨, 杜修力, 戴福初, 王国盛, 高岩. 不同黏性土的残余强度及其抗剪强度指标特性研究[J]. 岩土工程学报, 2017, 39(3): 436-443. DOI: 10.11779/CJGE201703006
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XU Cheng-shun, WANG Xin, DU Xiu-li, DAI Fu-chu, WANG Guo-sheng, GAO Yan. Experimental study on residual strength and index of shear strength characteristics of different clay soils[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 436-443. DOI: 10.11779/CJGE201703006
Citation: XU Cheng-shun, WANG Xin, DU Xiu-li, DAI Fu-chu, WANG Guo-sheng, GAO Yan. Experimental study on residual strength and index of shear strength characteristics of different clay soils[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 436-443. DOI: 10.11779/CJGE201703006
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不同黏性土的残余强度及其抗剪强度指标特性研究  English Version

  • 北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124

基金项目: 国家重点基础研究发展计划（“973”计划）项目（2011CCB13600）; 国家自然科学基金项目（51278015）
详细信息
    作者简介:

    许成顺（1977- ）,女,教授,主要从事土动力学与岩土地震工程研究。E-mail: xuchengshun@bjut.edu.cn。

Experimental study on residual strength and index of shear strength characteristics of different clay soils

  • Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China

摘要

    摘要
  • 摘要: 利用环剪仪系统地研究了17种不同塑性指数的饱和黏性土在不同固结状态下的残余强度的变化规律,分析了当前法向应力、超固结比、塑性指数和多级剪切方式对残余强度的影响,重点给出了大变形条件下的抗剪强度指标随塑性指数的变化规律及实用公式。试验结果表明：残余强度随当前法向应力的增大而增大;超固结比对残余强度没有显著的影响;随着塑性指数的增大,残余强度逐渐减小;残余强度在较小的当前法向应力水平下具有明显的非线性;在大变形条件下,残余内摩擦角随塑性指数的增大而减小;最后给出了残余内摩擦角与塑性指数的函数关系式。
    Abstract: Using the ring shear apparatus, the variation rules of residual strength of 17 saturated claysoil samples with different plasticity indices under different consolidation conditions are studied. The influences of current normal stress, over-consolidation ratio, plastic index and multistage shear mode on the residual strength are analyzed. The variation of shear strength index with different plasticity indices under large deformation and the corresponding practical formula are investigated. The test results show that with the increase of the current normal stress, the residual strength increases. The over-consolidation ratio does not have a significant impact on the residual strength. With the increase of the plasticity index, the residual strength reduces gradually. Under the small stress level the residual strength is nonlinear. Under large deformation, the residual internal friction angle increases while the plasticity index decreases. Finally, the formula for the relation between the residual internal friction angle and the plasticity index is proposed.
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  • 收稿日期:  2016-01-27
  • 发布日期:  2017-04-24

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