美国肯塔基州史密斯兰德72 MW水电站基坑开挖时,发生了特大洪水,河水位超过了百年一遇洪水位和堰顶高程。为了减轻洪水造成的损失,打开围堰上的防洪建筑物,采取了主动淹没基坑的措施。讨论了在主动淹没基坑和随后基坑排水过程中,随着河水位上升对围堰和基坑所进行的监测工作。 At the excavation of the 72 MW Hydropower Station in Smithfield, Kentucky, an extraordinarily large flood occurred and the water level surpassed the once-in-a-century flood level and crest elevation. In order to reduce the damage caused by the flood, the flood control structures on the cofferdam were opened and the initiative to submerge the pit was taken. Discusses the monitoring of cofferdams and foundation pits as the river level rises during active submerged pit and subsequent pit drainage.