曲线形冻结孔钻进技术探讨

Discussion on Drilling Technology of Curve Type Freezing Hole

曲线形冻结是地下冻结工程封底、封端、封头技术发展的新方向。阐述了曲线冻结技术特点,分析研究了不同曲率半径曲线形钻孔技术特点,指出柔性钻具技术适用于曲线形冻结孔钻进,提出了曲线形冻结孔技术在超小曲率半径钻进、实时纠偏、软土钻孔稳定性控制等方面的重点研究方向。

A curve type ground freezing would be a new orientation of a bottom sealing,end sealing and head sealing technology development for the underground freezing engineering.The paper stated the technical features of the curve freezing.The paper analyzed and studied the technical features of the curve type hole with different curvature radius.The paper pointed out that the technology of the flexible drilling tools could be suitable to the drilling of the curve type freezing hole.The paper provided the key study orientation of the curve type freezing technology in the minimum curvature radius drilling,real time deviation control,stability control of soft soil drilling and other aspects.