夏加国, 胡瑞林, 高玮. 2016: 土石混合体强度特性的大型三轴试验. 工程地质学报, 24(s1): 1211-1218. DOI: 10.13544/j.cnki.jeg.2016.s1.176
    引用本文: 夏加国, 胡瑞林, 高玮. 2016: 土石混合体强度特性的大型三轴试验. 工程地质学报, 24(s1): 1211-1218. DOI: 10.13544/j.cnki.jeg.2016.s1.176
    XIA Jiaguo, HU Ruilin, GAO Wei. 2016: RESEARCH ON MECHANICAL CHARACTERISTIC OF THE SOIL ROCK MIXTURES BY LARGE-SCALE TRIAXIAL SHEAR TESTS. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1211-1218. DOI: 10.13544/j.cnki.jeg.2016.s1.176
    Citation: XIA Jiaguo, HU Ruilin, GAO Wei. 2016: RESEARCH ON MECHANICAL CHARACTERISTIC OF THE SOIL ROCK MIXTURES BY LARGE-SCALE TRIAXIAL SHEAR TESTS. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1211-1218. DOI: 10.13544/j.cnki.jeg.2016.s1.176

    土石混合体强度特性的大型三轴试验

    RESEARCH ON MECHANICAL CHARACTERISTIC OF THE SOIL ROCK MIXTURES BY LARGE-SCALE TRIAXIAL SHEAR TESTS

    • 摘要: 以土石混合体重塑样为研究对象,采用大型三轴试验仪对其进行固结不排水试验,研究了含石量和围压对土石混合体力学性质的影响,分析了不同含石量、不同围压条件下土石混合体剪切强度和初始剪切刚度的变化趋势。实验结果表明:土石混合体的变形破坏模式不同于常规的岩土体,应力-应变曲线存在应力跳跃现象,且不同含石量、不同围压条件下,土石混合体的变形破坏模式也不同;土石混合体的剪切强度随着围压的增大而增大,随着含石量的增大先增大后减小,当围压增加一倍时,在不同的围压水平下,土石混合体的剪切强度的变化趋势不同;土石混合体的初始剪切刚度随着围压的增大而增大,随着含石量的增大先增大后减小,当围压增加一倍时,土石混合体的初始剪切刚度与剪切强度变化趋势一致。

       

      Abstract: Taking the remolded sample of soil rock mixtures as research objective, Consolidated undrained(CU)triaxial shear tests were performed to study the effect of volumetric block proportions(VBP) and confining pressures on mechanical behaviors of soil rock mixtures by using large-scale triaxial shear apparatus, the trends of the initial shear stiffness and shear strength of soil rock mixtures under different volumetric block proportions(VBP) and different confining pressure conditions are analyzed. The results show that: the degeneration failure mode of soil rock mixtures is different from conventional rock and soil mass, stress jump exists in the curve of stress-strain relationship, and the degeneration failure mode of soil rock mixtures is different between each other under different volumetric block proportions(VBP) and different confining pressure conditions. The Shear strength of soil rock mixtures increases with the increase of confining pressure, however, it increases initially then decrease with the the increase of the volumetric block proportions(VBP),when the confining pressure doubled, the trends of shear strength of soil rock mixtures is different at different levels of confining pressure; the initial shear stiffness of soil rock mixtures increases with the increase of confining pressure, and it increases initially then decrease with the the increase of the volumetric block proportions(VBP),when the confining pressure doubled, the trends of initial shear stiffness in accordance with the trends of shear strength.

       

    /

    返回文章
    返回