宝泉抽水蓄能电站引水系统上斜井古风化壳地层灌浆处理

Grouting Treatment on Upper Inclined Shaft of Water Diversion System in Ancient Weathering Crust

摘要:

宝泉抽水蓄能电站引水系统上斜井开挖揭示，在高程668000～651000 m和高程526000～514000 m处，分别穿过古风化壳地层。古风化壳地层岩石极为破碎，夹泥较多，基岩裂隙发育，地下水丰富，透水率较大。古风化壳地层段地层的灌浆处理，成为斜井开挖能否顺利通过该地层的关键，并且直接影响着电站的安全、稳定运行。针对上述问题，通过采取阻水帷幕、高压固结、锥形帷幕灌浆几种方法联合处理，取得了满意的效果。详细介绍了具体的灌浆处理技术措施，分析了处理效果。

Abstract:

The excavation for upper inclined shaft of water diversion system of Baoquan Pumped-storage power plant revealed that in the elevation of 668.000~651.000 m and 526.000~514.000 m, the ancient weathering crust was separately drilled through. The rock in ancient weathering crust is rather broken with much slob, bedrock fracture, abundant groundwater and large pervious rate. Grouting of ancient weathering crust becomes the most important step in inclined well excavation, and directly influences the safety and steady operation of pumped-storage power plant.