流土和管涌破坏机理研究

    STUDY ON THE MECHANISM OF PIPING AND FLOWING SAND

    • 摘要: 首先针对渗流破坏的机理进行研究,区别在堤防工程中常用的流土和管涌的概念,从现有的大量土的渗流破坏的实验资料,结合理论分析,从微观的角度去阐述渗流破坏的形成机理,提出了在级配连续性土和级配不连续性土中进行管涌型土和流土型土判别的标准.然后从定量的角度去推导出各种渗流破坏类型的判别公式以及临界抗渗坡降计算公式.

       

      Abstract: In this thesis,the mechanism of piping is firstly studied by, lots of experiments and theoretic analysis.As a result, it is proved that piping and flowing are two different kinds of erosion effect. It is proposed how to discriminate between piping and flowing sand. Additionally, the formula of the critical seepage gradient is proposed.

       

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