索风营水电站左岸防渗帷幕溶洞区灌浆处理技术

索风营水电站左岸帷幕穿越三叠系下统夜郎组玉龙山段 （T1y2）厚层及薄层灰岩,由于断裂的影响,地层中溶洞、溶蚀裂隙及泥化夹层均较发育,是防渗帷幕灌浆处理的难点和重点.为此,专门制定了对K10、S63溶洞系统、溶蚀裂隙及泥化夹层的灌浆处理技术措施和方法.实践表明,左岸防渗帷幕采取双排孔布置,以及事先查明溶洞系统发育规模与部位并进行封堵、扩孔灌注混凝土及水泥砂浆等措施,能保证帷幕灌浆工程的质量,防渗效果达到了设计要求.

Grouting Treatment Technology for Cavern Zone of The Anti-seepage Curtain on The Left Bank of Suofengying Hydropower Station

The curtain on the left bank of Soufengying Hydropower Station penetrates thick and thin limestone strata in Yulongshan section,Yelang group,lower series of Triassic system(T_(1y)~2).Because of influence of faults solution cavities,fissures,argillation intercalations strongly develop in these strata,they are main difficult points for anti-seepage curtain grouting.The engineers specially made up grouting treatment measures and methods for solution cavities K10 and S63,solution fissures and argillation intercalations.These measures include distribution of double holes for grouting,closing the areas that karst strongly develops using expanding holes and impregnating concrete and cement mortar and etc..The practice has made known that these measures are effective,and insure engineering construction quality.