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三峡一期土石围堰工程是为了保护右岸一期导流明渠能够在枯、汛期都不受水情影响常年施工而修建的建筑物,围堰与右岸岸坡相围构成导流明渠施工的封闭基坑。围堰设计堰顶全长2649米,高程79至80米,堰体为土石结构,防渗体为yKC防渗心墙与上部土工织物和下部局部灌浆帷幕的结合体。施工工程量包括土石方填筑340万立米,水下清淤20余万立
The Three Gorges Project Phase 1 earth and stone cofferdam is a building constructed to protect the first-phase diversion channel on the right bank during the dry and flood seasons, which is not affected by the year-round construction of water conditions. The closure of the diversion canal and the right bank bank slope constitute the closure of the diversion channel construction. Foundation pit. The cofferdam design dome has a total length of 2649 meters and an elevation of 79 to 80 meters. The concrete body is a soil-rock structure. The impervious body is a combination of the yKC impervious core wall and the upper geotextile and the lower partial grout curtain. The amount of construction work includes earth and stone filling 3.4 million cubic meters, and more than 200,000 underwater dredging