潜孔锤偏心跟管钻进在高压喷射灌浆中的应用

Eccentric DHT drilling in high pressure jet grouting

由冲积堆积的含漂砂卵砾石层和冲洪堆积含漂卵砾石夹砂土层组成的地层,是钻探工程中常见的一种典型的难钻进不稳定地层。文章介绍了通过采用潜孔锤偏心钻头跟管钻进法,克服了砂卵石成孔难点,加快了施工进度,保证了工程质量。

By the accumulation of alluvial sand and gravel layer with bleach and washed with Boulder Hong：stacked layers consisting of coarse ground, is a drilling project in the common difficulty of drill- ing a typical unstable ground. This paper introduces the eccentricity through the use of DHT hammer drilling bit with the tube method, a sand and gravel into the hole to overcome difficulties, to speed up the construction progress, ensure project quality.