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帷幕灌浆采取孔口封闭,孔内循环,自上而下分段灌浆,排内施工顺序为先两边排,后中间排。三排孔布置时每排分两序孔施工,先施工Ⅰ序孔,再施工Ⅱ序孔。同一排上相邻的两个次序孔之间,以及后序排上第一次序孔与其相应部位前序排上最后次序孔之间,在岩石中钻孔灌浆的间隔高差不得小于15m。
Curtain curtain to take the hole closed, the hole circulation, grouting grouped from top to bottom, the row of the construction sequence for the first two sides row, after the middle row. Arrangement of three rows of holes arranged in two rows of holes for each row, the first construction of the first hole, then the construction of the second hole. In the same row, between two adjacent sequence holes, and between the first sequence hole on the rear row and the last row on the front row of the corresponding part, the height difference of the drilling grouting in the rock shall not be less than 15m.