屹立在长江上的葛洲坝水利枢纽二号船闸,全长407米,闸室有效长280米,净宽34米,是目前我国最大的船闸,也是世界上大型船闸之一。船闸座落在由下白垩系的砂岩,粘土质粉砂岩及粘土岩组成的软弱夹层上,一条裂隙性强透水带从闸室中段的基岩中穿过。这种复杂的基岩地质条件,将导致船闸产生不均匀沉陷、倾斜、扭转和水平位移,降低建筑物的抗 The No. 2 ship lock of Gezhouba Hydro Project on the Yangtze River, with a total length of 407 meters and an effective length of 280 meters and a net width of 34 meters, is the largest ship lock in China and one of the major ship locks in the world. The lock is located on a weak interlayer of Lower Cretaceous sandstone, clayey siltstone and clay rock, and a fissured permeable belt passes through bedrock in the middle of the chamber. This complex bedrock geological conditions will result in uneven subsidence, tilt, twist and horizontal displacement of the ship lock, reducing the building’s resistance