Abstract: Because of severe seepage and calcium-bleeding in Luowan Dam,decision has been made in2001to carry out anti-seepage treatment at upstream facing.A10-cm-thick anti-seepage bituminous concrete is cast to cover the face slab,using plastic sealing material at expansion crack,lying3～5-m-thick clay blanket along dam datum line upstream.A cofferdam was built in front of the dam for anti-seepage treatment under EL338m to make construction in the dry.?

摘要： 鉴于罗湾大坝渗漏析钙的严重性，2001年决定对大坝上游面板进行防渗处理。大坝上游面板浇筑一道10 cm厚的沥青混凝土防渗层，伸缩缝采用SR塑性止水材料。沿坝基线上游侧铺设3~5 m厚的粘土铺盖。338 m高程以上水上施工，338m高程以下防渗处理，在坝前修筑一道围堰，抽干库水，实行旱地施工。