嵌岩扩底灌注桩及MRR型基岩扩底钻头

Rock,Underreamed Piles and MRR Rock Underreamer

摘要:

简要介绍了国内外扩底技术现状、扩底灌注桩的特点、ＭＲＲ型基岩扩底钻头的结构及技术参数，结合工程实例对ＭＲＲ１０００钻头的使用效果进行了分析。

Abstract:

A brief introduction is given to the present state of underreaming technology and features ofunderreamed piles in bed rock both at home andabroad. An analysis is made on the use of MRR 1000bit with reference to field cases.