青草沙水库堤坝工程关键技术研究与实践

Key technology and practice of dyke engineering design of Qingcaosha Reservoir

青草沙水库作为上海市的取水水源水库,地处长江口,其工程建设面临河口区域复杂水动力条件、河床演变、地质条件等困难,对建筑材料选择和施工作业的限制颇多。在青草沙水库堤坝工程设计中,开展了潮汐河口水库选址选线与工程保滩、潮汐水流作用下特大龙口的保护与截流、水力充填堤坝渗流控制等关键技术研究,取得了深水筑堤、保滩护底、特大型龙口截流、水力充填堤坝多元化渗流控制等一系列创新成果,并已成功应用于工程实践中,保障了青草沙水库的顺利建成供水,对今后类似潮汐河口地区的堤坝建设具有借鉴意义。

Qingcaosha Reservoir Project, a water source reservoir of Shanghai City in the Yangtze River Estuary, is confronted with great difficulties such as complex estuarine hydrodynamic condition, fluvial evolution and complicated geological condition, which exert many constraints on construction technology and selection of construction materials. In the design of dyke of Qingca- osha Reservoir, several key technologies are researched deeply and valuable results are obtained, including reservoir site selection and shoal protection, closure and protection of extra - large tidal closure gap as well as seepage control for hydraulic filling. These research results have been applied in the engineering practice successfully, and ensured the smooth construction of the reservoir.