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南水北调中线是一项跨世纪的大型水利工程,从长江支流汉口上的丹江口水库引水,沿唐白河流域北部及黄、淮、海平原西部,布设自流输水总干渠,全长1 237km,供河南、河北、天津、北京四省,市的城市生活,工业,农业及环境改善等用水。沿线总干渠与集流面积小于20km~2河沟的交叉建筑物是南水北调的重要组成部分,包括排洪槽、倒虹吸、暗涵三种类型。根据长委文件规定:地震设计裂
The midline of the South-to-North Water Diversion Project is a large-scale water conservancy project of the past century. It drew water from the Danjiangkou Reservoir on the Hankow, a tributary of the Yangtze River. It drafted a gravity-fed main canal along the northern Tangbaihe River basin and the western part of the Huang-Huai-Hai Plain. , Hebei, Tianjin, Beijing, four provinces, cities of urban life, industry, agriculture and environmental improvement and other water. Crossing structures along the main canal and current collecting area of less than 20km ~ 2 are important components of the South-to-North Water Diversion Project, including flood discharge troughs, inverted siphons and concealed culverts. According to the document of the Long Commission: Earthquake design crack