牙轮钻头在钻孔灌注桩进入硬岩中的应用研究  

Applicant research of bored piles into the hard rock with roller cone bit

作　　者：刘荣桂[1] 邾祝融[1] 程知言[2] 颜庭成[1] 

机构地区：[1]江苏大学土木工程系,江苏镇江212013 [2]江苏华东建设基础工程总公司,江苏南京210007

出　　处：《四川建筑科学研究》2008年第1期100-102,共3页Sichuan Building Science

摘　　要：以安山岩为例,总结和分析了安山岩的强度特性以及组合牙轮钻头的破岩机理。由于中微风化安山岩岩质硬,采用滚刀钻头破岩效果差,施工进度慢。结合南京汇达广场桩基工程地质情况,提出了进入安山岩时,采用组合牙轮钻头代替滚刀钻头。此法大大提高了施工进度,降低了工程成本。It is summarized and analyzed the strength characteristic of andesite and the prineipium of destroying rock of roller bit, take andesite for example. Due to the fact that andesite is extraordinary hard, if using roller bit to destroy rock ,the result is not good. The construction speed is slow and the wastage of bit is considerable. It is combined with the engineering geology of Huida public square in Nanjing, suggesting that roller cone bit should take place of roller bit when digging in rock. This method can not only speed up the construction, but also reduce the construction cost.

关 键 词：牙轮钻头 钻孔灌注桩 安山岩 破岩机理 

分 类 号：TU473.1[建筑科学—结构工程]