Analysis on seepage effects of plastic concrete cut-off wall in construction and operation period of hydropower station tail channel

摘要

By numerical calculation, it analyzed the seepage effects of plastic concrete cut-off wall in in construction period. On construction period, the seepage flow from inside of channel to outside at unit length is 0.753m~3/h. The seepage flow from under plastic concrete cut-off wall is 0.646m~3/h which is 85.79％ of total seepage flow. Under certain condition on operation period, the seepage flow from inside of channel to outside at unit length is 0.394m~3/h. The seepage flow from under plastic concrete cut-off wall is 0.358m~3/h which is 90.86％ of total seepage flow. Under another condition on operation period, the seepage flow from inside of channel to outside at unit length is 0.249m~3/h. The seepage flow from under plastic concrete cut-off wall is 0.236m~3/h which is 94.78％ of total seepage flow. In It showed the plastic concrete cut-off wall has obvious effect.