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一、前言江垭水电站位于湖南慈利县江垭向斜北翼溇水上,拟建坝高130米,坝基下埋藏的热水承压含水层,水温51℃,水头高出地表15米,其上相对隔水层厚68.49米,起着热水层的顶盖作用。建坝后,库水壅高110米,在高水头作用下,坝下渗流场的变化趋势以及温泉对水工建筑物的影响是工程设计中的一个重要问题。
I. Introduction Jiangya Hydropower Station is located in the southern tip of Jiangya syncline in Cili County, Hunan Province. It is planned to build a dam with a height of 130 meters. The buried hot water under the dam foundation confines the aquifer at a water temperature of 51 ℃ and the water head is 15 meters above the surface. On the relative water level 68.49 meters thick, plays a role in the roof of the hot water layer. After the dam is built, the water level of the reservoir is 110 meters high. Under the action of high water head, the changing trend of the seepage field beneath the dam and the influence of hot springs on the hydraulic structures are an important issue in engineering design.