河南省宿鸭湖水库异常渗水分析及处理

Analysis and treatment of abnormal seepage in Henan Suya Lake Reservoir

河南省宿鸭湖水库大坝渗水异常,下游出现沼泽化,长度绵延几公里,积水宽度30～50m,积水量随库水位升降而增减明显。经勘探,存在中等一强透水砂层。经方案比选,采用深层水泥土搅拌桩防渗墙进行防渗处理,施工中严格按照施工方案控制施工质量。完成后与历史同期相同水位比较,防渗效果明显。

Henan Suya Lake Reservoir dam has abnormal water seepage.Paludification is occured in the downstream area,and the length extends for several kilometers.Water-logging width is 30 ～ 50 m.Accumulated water is significantly increased or decreased with reservoir water level.Medium-strong permeable sand layer is available according to exploration.Seepage prevention treatment is implemented with deep cement-soil mixing pile cut-off wall through scheme comparison.Construction quality is controlled in strict accordance with construction plan in construction.It is compared with the same water level at the same period after the project completion,and seepage control effect is obvious.