钻进大口径锚索孔的新方法——浅谈潜孔锤扩底钻进

A new method of drilling an anchor hole——Discussion on DTH enlarging bottom of a hole

在高边坡施工大吨位锚索孔存在一些困难,文中给出了一种以潜孔锤跟管和孔底扩孔相结合的施工方法,用该方法施工可用较小的钻机钻进较大的孔。

There is some trouble in the construction of drilling large tonnage anchor hole in the high slope.This paper presents a drilling method in combination drilling and casing simultaneously with enlarging the hole in the bottom.Us-ing this new method can resolve the problem of operating a smaller drilling machine to bore a larger anchor hole.