含高承压水黄土层中注浆堵水的理论与实践

在高承压水黄土层中掘井筒，使用冷冻法似乎又成了工程定例，但其高昂的施工费用常令建设者望而却步。而运用廉价的普通注浆的方法进行堵水能保证井筒安然通过，国内外鲜有成功 例。

THEORY AND PRACTICE OF WATER BLOCKING BY USING COMMON GROUTING METHOD IN SATURATED CLAY STRATA UNDER HIGH PRESSURE WATER

Use of specialized method for soil stabilization, freezing method, accustomed to be a rule when shaft sinking in saturated clay under high pressure water. With expensive cost, it is limited for this method to be adopted. There is a few successful precedent of water blocking by using common grouting method in such situation. In view of that the West Air shaft is sunk in the Quaternary clay with high water pressure of 0 85 MPa and large in flow of 104m 3/h at Fanshan Phosphate Mine, a new conception of water blocking, Backward Grouting,is advanced.And according to the correct judge and distintive design with this new concept, the shaft penetrates the water bearing and unconsolidated clay stratasafely by using common grouting method.