Experimental research on the effect of groundwater seepage on bank slope′s stability

Based on the underground steady seepage′s analytical solution and FEM solution,we analyzed the seepage gradient′ s distribution law on slope surface,and obtained the calculation formula for the critical fall of soil particle on unconfined seepage surface.We also carried out an experimental research on the effect of groundwater seepage on bank slope′s stability and analyzed the river bank-failure′s mechanism of occurrence,development and evolution process under the action of underground seepage.We studied the seepage control measures for bank-failure′s prevention,especially the effect of geotextiles and drainage well on reducing the risk of seepage failure and increasing the stability of slope from prevention of seepage failure,reduction of saturation line and decrease of seepage discharge.The design criteria for geotextiles and calculation method for drainage well seepage are presented.