摘要
为解决山岭地区竖井施工中快速出碴问题,对重庆地铁6号线支线竖井施工中大量采用漏碴孔出碴的情况进行分析。得出以下结论:1)当竖井深度较深、断面较大、底部有施工通道与外界相连时,采用漏碴孔出碴,可以显著提高施工速度、节约成本;2)施工过程证明,漏碴孔采用旋挖钻机的方式成孔,具有快速安全且适用性广泛的特点。
The application of mucking through muck-dropping boreholes in the sinking of the vertical shafts on the branch of No.6 line of Chongqing Metro is analyzed.Conclusions drawn are as follows： 1） Mucking through muck-dropping boreholes can accelerate the shaft sinking and reduce the shaft sinking cost when the vertical shafts are deep,have large cross-section and have underground galleries stretching from the shaft bottoms toward the ground surface;2） It is rapid,safe and reliable to drill muck-dropping boreholes by rotary drilling rigs.
出处
《隧道建设》
2011年第4期515-518,共4页
Tunnel Construction
关键词
竖井施工
漏碴孔
出碴
旋挖钻机
vertical shaft
muck-dropping borehole
mucking
rotary drilling rig
