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。
Most of the joints in the broken dolomite rock mass were originally tight, to the extent that little grout could be injected.
大多在残破的白云岩岩石大量的联接最初是紧的，在某种程度上可能注射一点水泥。
Generally, chemical interactions occurred between foundation rock (including grout curtain) and ground water are the main reason of many time-related engineering problems occurred in dam foundation.
坝基岩体(包括防渗帷幕)与其中地下水水溶液之间发生的化学作用是坝基晚期出现一系列病态问题最重要的原因之一。
Step one is to grout with low grouting pressure to fill the gravel pack interval and blocked the channels which relieves the grouting pressure in the shallow surrounding rock.
“一步”低压注浆充填壁后散体状碎石充填层，堵塞浅部围岩泄压通道；
Step one is to grout with low grouting pressure to fill the gravel pack interval and blocked the channels which relieves the grouting pressure in the shallow surrounding rock.
“一步”低压注浆充填壁后散体状碎石充填层，堵塞浅部围岩泄压通道；
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