摘要
深厚卵砾石地层的桩基成孔一直是个未获得很好解决的问题，目前来说，反循环冲击钻进法是高效低成本的先进成孔技术之一。
Grab drilling method is efficial and economical in shallow soft clays.Reverse impact drilling in bouldery formation is a new-hopeful technique.Some experiences on this technique were introduced.
出处
《地质与勘探》
CAS
CSCD
北大核心
1998年第3期55-56,共2页
Geology and Exploration
