滤网孔径影响砂土径向渗透特性的试验研究

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.