A better method for calculation of water cut-off rate and evaluation of curtain grout effect was proposed.
提出了一种能较好地计算堵水率，评价帷幕注浆效果的方法。
When the bore hole-top-enclosed grouting method is used to conduct high-pressure curtain grouting, shallow weathered broken rock is easy to be split, resulting in excessive grout loss.
采用孔口封闭灌浆法进行高压帷幕灌浆时，对于浅层风化破碎岩体易产生多次劈裂而流失过多浆液造成浪费。
When the bore hole-top-enclosed grouting method is used to conduct high-pressure curtain grouting, shallow weathered broken rock is easy to be split, resulting in excessive grout loss.
采用孔口封闭灌浆法进行高压帷幕灌浆时，对于浅层风化破碎岩体易产生多次劈裂而流失过多浆液造成浪费。
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