Study on seepage control of micro pervious vertical seepage control wall of earth-rock dam on the base of heterogeneous infinite deep pervious foundation
Along with the dam locations with the good geologic condition are decreasing gradually, many dams have been or will be located on the heterogeneous infinite deep pervious foundation or deep overburden foundation. In order to meet the safe operation of dam under the premise of as far as possible to reduce the seepage flow, through physical model experiment, this paper studied the influence of the depth of earth-rock dam micro pervious vertical seepage control wall on the base of the heterogeneous infinite deep pervious foundation upon dam foundation seepage flow. It can get the effective depth of vertical seepage control wall when the waterhead in front of earth-rock dam is under unchanged condition. The trend of marked reduction of seepage of dam foundation decrease, when the depth of suspended cut-off wall is more than 10times of the waterhead in front of earth rock dam, the seepage of dam foundation approximately trends to be stable, when the depth of suspended cut-off control wall is about 20times of the waterhead in front of earth rock dam.