摘要
为确保郑万高铁隧道施工的安全、质量,加快隧道施工进度,在软弱围岩中采用三臂凿岩台车进行大断面施工。通过对三臂凿岩台车进行适当改造(改造推进梁位置、改用加粗钻杆、改装降低夹持器高度、更换耐磨大钻头等)可实现利用三臂凿岩台车进行加深炮孔、超前地质钻孔、超前管棚施工;将提前设定好的钻臂负责施工范围、钻孔顺序、钻孔深度及角度等钻爆参数导入三臂凿岩台车操作控制系统可方便钻爆施工;加装3D激光扫描仪,可实现隧道开挖断面扫描。通过对比三臂凿岩台车与传统钻爆法施工在钻孔精度、钻爆效果、施工管理和施工进度等多个方面的优缺点,采用三臂凿岩台车大断面施工相对于传统分部开挖施工,减少了施工作业工序及施工干扰,更便于施工组织和管理,更有利于隧道施工安全质量的控制、加快施工进度;大断面施工减少了分部施工时多次对围岩的扰动,更有利于围岩稳定。通过一系列的试验,总结出一整套三臂凿岩台车在软弱围岩地质条件下施工的理论数据及现场施工经验,为今后推广三臂凿岩台车在隧道软弱围岩中大断面施工提供借鉴。
In order to ensure the safety and quality of the construction of Zhengzhou-Wanzhou high-speed railway tunnel and shorten the construction schedule of the tunnel,the large cross-section construction method by triple-boom rock drilling jumbo is put forward.And then proper transformations for the jumbo,i.e.changing the position of the driving beam,using thick drill pipe,reducing the clamp height and changing big wear drill,are carried out to realize blasting hole deepening,advance geological drilling and advance pipe roofing.The pre-set construction range,drilling process,drilling depth and blasting parameters are added to operating system of the jumbo.The 3D laser scanner is used to scan the tunnel excavation cross-section.The comparison between triple-boom rock drilling jumbo and conventional drilling and blasting method is made in terms of drilling accuracy,drilling and blasting effect,construction management,construction schedule,etc.The results show that:(1)By adopting triple-boom rock drilling jumbo,the construction process and disturbance can be reduced,the construction organization and management can be carried out easily,and the construction quality can be guaranteed.(2)The large cross-section construction method can reduce the disturbance of construction on surrounding rock,and is good to surrounding rock stability.The theoretical data and applicable experience of triple-boom rock drilling jumbo are summarized to provide reference for application of triple-boom rock drilling jumbo in the future.
作者
赵宏博
卢伟
ZHAO Hongbo;LU Wei(Xingshan Construction Headquarter,Wuhan-Jiujiang Railway Passenger-dedicated Line Hubei Co.,Ltd.,Yichang 443000,Hubei,China;Hubei Department of Zhengzhou-Wanzhou High-speed Railway Project,China Railway No.5 Engineering Group Co.,Ltd.,Badong 444303,Hubei,China)
出处
《隧道建设（中英文）》
北大核心
2018年第8期1342-1349,共8页
Tunnel Construction
基金
中国铁路总公司科技研究开发计划课题(2017G007-F
2017G007-H)
关键词
高铁隧道
软弱围岩
三臂凿岩台车
大断面施工工法
high-speed railway tunnel
weak surrounding rock
triple-boom rock drilling jumbo
large cross-section construction method
