葛洲坝二江泄水闸是泄洪和排沙的主要通道。去年特大洪水期间,闸室和护坦受到大流量、高流速的江水所挟带的大量泥沙和卵砾石的冲刷,出现了麻面、腐蚀和气蚀等破损现象。为了保证泄水闸和整个枢纽的安全运行,必须在今年桃汛前全部修补完毕。为此,主要采用了两种修补方法。 Gezhouba Erjiang sluice is the main channel of flood discharge and sediment discharge. Last year during the flood period, sluice chambers and escort tanks were washed away by large amounts of sediment and gravel brought along by high-flow and high-velocity rivers, causing damage such as pitting, corrosion and cavitation. In order to ensure the safe operation of the sluice gate and the entire hub, it must be completely repaired before the peach flood this year. To this end, mainly used two methods of repair.