摘要
旋挖钻成孔核心技术为通过旋挖钻底部带有活门的桶式钻头,利用钻杆的扭矩力将钻头压入土体回转破碎岩土,并将其装入钻头内,提出孔外卸土,往复循环达到成孔目的。
The core technology of rotary drilling is using drill pipe rotary torque force to press the barrel drill which is located on the bottom of the rotary drilling and with a valve into the rock and soil,and then rotate the drilling to break the rock and soil,make the barrel full with fragments,then pull the drill out to pour them out,repeat several times until the hole forming.
关键词
旋挖钻机
成孔灌注桩
龙青高速公路
应用
rotary drilling rig
bored pile
LongQing expressway
application
