江垭大坝第5号、8号坝段坝面裂缝处理  

Dam face crack treatment of the dam block No.5 and No.8 at Jiangya dam

作　　者：邓虎 吴毅 周福生 

机构地区：[1]湖南省江垭水电站,湖南慈利427200 [2]湖南宏禹水利水电岩土工程公司,湖南长沙410007 [3]湖南省澧水流域水利水电综合开发有限公司,湖南慈利427200

出　　处：《大坝与安全》2008年第2期59-61,共3页Dam & Safety

摘　　要：湖南省江垭大坝第5号、8号坝段原施工期处理的裂缝在较长时期温度、水位变化作用下重新张开,并有继续发展的趋势。经过前期勘探和采取有效的安全监测措施后,运用了化学灌浆和表面防渗处理。表面防渗处理采用SR2纳米塑性止水材料和环氧砂浆嵌缝,PSI-tape裂缝修补带封缝?裂缝灌浆采用了LW水溶性聚氨酯灌浆材料。裂缝处理完后,经压水试验检查和外观检查,200m廊道内混凝土表面干燥,裂缝处未发现渗水现象,完全满足预想要求,达到了处理的目的。Because of long-terra temperature and water level change, the cracks once treated during construction period at the dam block No.5 and No.8 of Jiangya dam split again and tended to develop. By investigation and with safety monitoring, chemical grouting and surface anti-seepage treatment were adopted. In surface anti-seepage treatment, SR2 plastic sealing nanomaterial and epoxy slurry were used in joint caulking, while PSI-tape crack repair belt was used to obdurate cracks. In chemical grouting, LW waterborne polyurethane was used. After treatment, the water pressure test and outside examine were taken and no seepage were found, which indicated that the treatment effect was good.

关 键 词：江垭大坝 裂缝 SR2纳米塑性止水材料 PSI—tape裂缝修补带 LW水溶性聚氨酯 化学灌浆 防渗处理 

分 类 号：TV698.2[水利工程—水利水电工程]