大口径旋挖钻具的研究及其应用

Application and Research of Large Diameter Rotary Drill Tools

摘要:

介绍了旋挖钻进所用的各种钻具结构特点及适用地层，包括螺旋钻具、旋挖钻斗、筒式环状钻头、扩底钻头。并介绍了这些钻具在青藏铁路等工程施工中应用所取得的良好效果。

关键词:旋挖钻进 旋挖钻具 钻孔桩 青藏铁路

Abstract:

The structure peculiarities and formation of application of different rotary drill tools, including helicoidal drill head, rotary drill bucket, tube-shaped ringlike bit and under reamer, were introduced. The application results of the tools in construction of railway Qinghai to Tibet were also briefly mentioned.

Key words:rotary drilling,rotary drill tools,bored pile,Railway Qinghai to Tibet