“深厚砂卵石覆盖层金刚石钻进与取样技术”,是《深厚覆盖层建坝研究》中的重要成果之一。在深厚砂卵石覆盖层中,成功地采用无固相冲洗液护壁配合金刚石钻进,使这类地层的钻探与取样有了新的突破,并初步解决了薄砂层取样的难题,获得了较好的技术经济效果。 “Deep sand and pebble overlay diamond drilling and sampling technology”, “deep overburden dam research” one of the important achievements. In the deep sand and pebble overlay, the successful use of non-solid flushing fluid retaining wall with diamond drilling, drilling and sampling of such formations have made a new breakthrough, and initially solved the problem of sampling sand, obtained more than Good technical and economic results.