柘林水电站泄空洞是用于放空水库以及施工后期导流和运用期辅助泄洪的泄水建筑物。泄空洞自1972年建成至1976年原一级趾墩消力池每年在运用中都有程度不同的破坏,其中,1973年趾墩下游护坦遭受的空蚀破坏最为严重 The Zhelin Hydropower Station Drainage Tunnel is a drainage structure used for venting reservoirs and auxiliary flood discharging during the post-diversion and utilization phases. Drainage hole was built in 1972 to 1976, the first-class toe pier digester each year in the use of different degrees of damage, of which in 1973 toe Pier underpass suffered the most severe cavitation damage