潜孔锤偏心跟管钻进法在卵砾石地层岩土工程勘察中的应用

Downhole Hammer Concentric Simultaneous Casing Drilling Method Applied to Rock-Soil Engineering Survey in the Gravel Strata

卵砾石地层是钻探工程中常见的一种典型的难钻进不稳定地层。通过采用潜孔锤偏心跟管钻进法,从根本上解决了卵砾石地层难以钻进的难题,结合都匀市区岩土工程勘察实例,笔者认为潜孔锤偏心跟管钻进法是在卵砾石地层钻进中行之有效的一种钻进法。

The gravel stratum is a common and typical unstable bed difficult for borehole prospecting project. Through applying downhole hammer concentric simultaneous casing drilling method, the difficulties that drill in gravel strata are solved out fundamentally, the authors consider downhole hammer concentric simultaneous casing drilling is an effective way for gravel beds in combination with a case of rock - soil engineering survey in Duyun City