含水率对土石混合体力学特性影响的试验研究

薛亚东 岳磊 李硕标

薛亚东, 岳磊, 李硕标. 2015: 含水率对土石混合体力学特性影响的试验研究. 工程地质学报, 23(1): 21-29. doi: 10.13544/j.cnki.jeg.2015.01.004
引用本文: 薛亚东, 岳磊, 李硕标. 2015: 含水率对土石混合体力学特性影响的试验研究. 工程地质学报, 23(1): 21-29. doi: 10.13544/j.cnki.jeg.2015.01.004
XUE Yadong, YUE Lei, LI Shuobiao. 2015: EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF SOIL-ROCK MIXTURE CONTAINING WATER. JOURNAL OF ENGINEERING GEOLOGY, 23(1): 21-29. doi: 10.13544/j.cnki.jeg.2015.01.004
Citation: XUE Yadong, YUE Lei, LI Shuobiao. 2015: EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF SOIL-ROCK MIXTURE CONTAINING WATER. JOURNAL OF ENGINEERING GEOLOGY, 23(1): 21-29. doi: 10.13544/j.cnki.jeg.2015.01.004

含水率对土石混合体力学特性影响的试验研究

doi: 10.13544/j.cnki.jeg.2015.01.004
基金项目: 

国家自然科学基金项目(No.40772179,No.41072206), 贵州省交通厅科技项目(2010-122-010-3-1)资助

详细信息
    作者简介:

    薛亚东(1971-),男, 博士,副教授,主要从事复杂岩土体本构与隧道工程方面的研究与教学工作. Email: yadongxue@126.com

  • 中图分类号: TU47

EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF SOIL-ROCK MIXTURE CONTAINING WATER

  • 摘要: 土石混合体的变形和剪切强度参数主要受含石率、块石形状、土体性质和水等因素的影响,现阶段的研究主要集中在前3方面因素,少有考虑水对其力学性能的影响.本文通过采用卵石、粉质黏土和水的不同比例制备混合体重塑试样,开展室内大型直剪试验.研究结果表明:随着模型剪切位移增加,土石混合体应力-切向位移关系曲线表现出3个阶段:线性变形阶段、初始屈服阶段、硬化阶段.含石率和含水率共同作用影响土石混合体材料力学性质.其中土石混合体的抗剪强度随含水率的增加经历了缓慢减小-快速减小-缓慢减小3个过程; 当含石率相同时,内摩擦角随着含水率的增加,经历了两个阶段的下降过程:低含水率的缓慢下降和高含水率的快速下降.
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出版历程
  • 收稿日期:  2014-10-27
  • 修回日期:  2014-12-25
  • 刊出日期:  2015-02-25

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