【摘要】 为了研究渗透破坏的机理，基于自行研发的径向渗透试验仪，开展了系列的不同滤网孔径条件下的砂土渗透破坏试验和砂土稳定渗透试验，研究了滤网孔径对砂土径向渗流特性的影响规律，分析了渗透试验过程中滤网孔径对渗透破坏的临界水头差、稳定渗流流速、土颗粒损失质量、土体径向渗透系数的影响。试验结果表明：滤网孔径对砂土的径向渗流特性具有重要影响；在渗透破坏试验中，减小滤网孔径可增大渗透破坏的临界水头差；在稳定渗透试验中，减小滤网孔径可有效降低砂土的渗透系数；同时土的细颗粒先于粗颗粒发生质量流失，仅当土颗粒的质量流失为零时，渗流流速才会达到最终稳定。更多还原

【Abstract】 Based on the self-developed radial penetration tester, a series of seepage failure tests and stable seepage tests on sand were carried out under various filter pore size conditions to study the influence of filter pore size on the radial permeation characteristics of sand. The influences of filter pore size on critical water head difference,seepage flow, mass loss of soil particles and radial permeability coefficient of sand were analyzed. The results show that the filter pore size has an important effect on the radial permeability of sand; The critical water head difference can be increased by decreasing the filter pore size in the seepage failure tests; Sand’s permeability coefficient can be efficiently decreased in the stable seepage tests by reducing the filter pore size; The mass loss of fine particles precedes that of coarse particles. If there is none of the mass loss of soil particles, the seepage velocity will be stable.更多还原