温亚楠, 朱鸿鹄, 张诚成, 施斌. 2015: 砂土蠕变特性研究现状及展望. 工程地质学报, 23(s1): 284-291. DOI: 10.13544/j.cnki.jeg.2015.s1.045
    引用本文: 温亚楠, 朱鸿鹄, 张诚成, 施斌. 2015: 砂土蠕变特性研究现状及展望. 工程地质学报, 23(s1): 284-291. DOI: 10.13544/j.cnki.jeg.2015.s1.045
    WEN Yanan, ZHU Honghu, ZHANG Chengcheng, SHI Bin. 2015: CURRENT STATURE AND TRENDS ON THE STUDY OF SAND CREEP. JOURNAL OF ENGINEERING GEOLOGY, 23(s1): 284-291. DOI: 10.13544/j.cnki.jeg.2015.s1.045
    Citation: WEN Yanan, ZHU Honghu, ZHANG Chengcheng, SHI Bin. 2015: CURRENT STATURE AND TRENDS ON THE STUDY OF SAND CREEP. JOURNAL OF ENGINEERING GEOLOGY, 23(s1): 284-291. DOI: 10.13544/j.cnki.jeg.2015.s1.045

    砂土蠕变特性研究现状及展望

    CURRENT STATURE AND TRENDS ON THE STUDY OF SAND CREEP

    • 摘要: 室内外试验和工程实践都表明砂土和软黏土一样, 也存在长期变形难以收敛的问题, 值得我们深入研究、探讨。为了更深入地认识砂土的蠕变, 首先从宏观和微观角度探讨了砂土蠕变的变形机制, 得出砂土蠕变主要是由颗粒重组和颗粒破碎等机制引起的, 然后, 从引起砂土蠕变的内因和外因研究了砂土蠕变特性, 同时分析了一维和三轴蠕变试验中的变形特性, 得出含水率、孔隙水性质、应力历史、应力路径和应力水平等对砂土蠕变都有一定的影响。最后, 从宏观和微观角度介绍了砂土蠕变模型, 并对今后砂土蠕变研究进行了展望。在对砂土蠕变的研究中, 离散元法将是未来研究的重要途径。未来可将试验研究、理论分析与数值模拟相结合, 开展更为深入的研究。砂土的蠕变将是土力学领域未来的重要研究方向之一。

       

      Abstract: Laboratory tests, field observations and engineering accidents have shown that sand exhibits long-term deformation like soft clay. These issues deserve our in-depth study. For further understanding of sand creep, the mechanism of creep is first discussed from macroscopic and microscopic viewpoints, results show that sand creep is caused mainly by the mechanism of particle reorganization and particle breakage. Then, creep characteristics are analyzed from internal and external factors, and the creep characteristics under both 1D and 3D creep tests are analyzed. Water content, pore water properties, stress history, stress path and size have a certain effect on sand creep. Finally, the creep models are analyzed from macroscopic and microscopic viewpoints, and a future prospect of sand creep is discussed. In the study of sand creep, discrete element method is an important way for future research. At the same time, experimental research, theoretical analysis and numerical analysis can be combined to carry out further research. Creep of sandy soil will be one of the major research directions for soil mechanics in the future.

       

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