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在人工挖孔桩、井筒构筑物及深基础地基处理的施工过程中,可能会碰上涌泥、流砂、涌水等现象。钢护筒护壁法施工及水泥类浆液进行注浆施工只能对淤泥层及其他土层有效,遇上涌水量较大的流砂层时根本解决不了问题。某地井筒工程在含水流砂层挖掘过程中,以纸浆废液、甲醛、农用尿素等材料配制注浆液,采用合适的注浆工艺注浆,使注浆范围内的砂层凝结成实体,注浆段涌水量从300m3/h降至0.5
During the construction process of artificial digging piles, wellbore structures and deep foundations, it may encounter the phenomenon of gushing mud, flowing sand and gushing water. Construction of steel tube wall protection and cement grouting grouting construction can only be effective on the silt layer and other soil layers, in the case of runoff with large influx of water can not solve the problem at all. In a wellbore project in the process of water flow sand mining, pulp slurry, formaldehyde, agricultural urea and other materials preparation of grouting fluid, grouting by appropriate grouting, the grouting within the sand layer solidified, note Pouring water from 300m3 / h down to 0.5