南水北调中线配套工程广阳水库地质问题及处理

The geologic problem and dispose measure of Guangyang reservoir in the middle route of the South-North water diversion matching project

广阳水库是调节南水北调中线配套工程——廊坊干渠来水的平原型调蓄水库,地基主要为第四系全新统壤土、砂壤土、粉细砂,其中粉细砂、砂壤土的渗透系数较大,坝基部位有可能产生渗漏、渗透变形等地质问题。库区地震基本烈度为8°,经判别,水库蓄水后,砂壤土、粉砂层存在地震液化问题,必须采取适当处理措施才能保证水库安全蓄水。

Guangyang reservoir is plain whose acction is regulating the water from middle route of South-North water transfer, It＇s groundsill is loam,sandy loam,silty sand and fine sand in quaternary deposit holocene,among them, the permeability of silty sand ＆fine sand,sandy loam is upper, dam foundation is likely to produce geologic problem on leakage,seepage failure etc. The earthquake seismic is 8 degree at there, by distinguish, The sandy loam and silty sand have earthquake liquefaction potential after water impoundment in the reservoir. We must adopt proper dispose measure in order to ensure the safety of water impoundment.