GCF－1500型冲击反循环钻机在桩孔硬岩中的钻进效果

GCF-1500 Percussive-Rotary Reverse Circulation Drill Are Used for Drilling Hard Rock Pile Hole

摘要:

该钻机在厦门钻进中风化、微风化的凝及熔岩，桩孔直径为１０００ｍｍ，最大孔深４７．５６ｍ。采用冲击反循环钻进，解决了采用回转钻进无法进尺的问题，取得了良好的效益。同时就该钻机存在的问题提出了改进建议。

Abstract:

This drill are used for drilling medium and slight-weathered tufflave in Xiamen,diameter of pile holeis 1000mm,maximum depth is 47.56m.Percussive-rotary reverse circulation drilling is used to solve the problems,which could not be solved by using rotatary drilling,meanwhile suggestions on improving this drill are put intlforth.