西宁石膏岩赋存于第三系中新统西宁组中段，分布于南、北两山的前山带。为了确保水工建筑物的安全和效益，在水工建筑物及其基础分布处，必须隔离石膏岩体与水体，尽量不让两者直接接触，防止石膏岩被溶蚀及由此产生渗漏而造成溃坝事故。（１）西宁石膏岩的溶蚀性石膏岩体... Xining gypsum occurs in the middle of the Miocene Xining Formation in the Tertiary, and is distributed in the anterior mountains of the two mountains in the south and north. In order to ensure the safety and efficiency of hydraulic structures, the gypsum and water bodies must be isolated from the hydraulic structures and their basic distribution so as to prevent direct contact between the two and prevent the gypsum rocks from being eroded and thus causing leakage Cause dam break accident. (1) Xining gypsum corrosive gypsum ...