软弱围岩全断面隧道机械化施工优化与效益分析
  • 作者: 刘建国
论文摘要

软弱围岩全断面隧道机械化施工优化与效益分析

刘建国

(中铁十八局集团第三工程有限公司,河北 涿州 072750)

[摘要]结合郑万高速铁路苏家岩隧道,总结出一套适合软弱围岩全断面隧道开挖的机械化配套及优化方案。通过现场实践可知,提高钻孔爆破效果和改良喷射混凝土质量能较好地提高工序效率和降低循环时间。软弱围岩全断面工法开挖进尺可适当增大,4.2m进尺较为安全、经济合理。机械开挖较人工开挖有着明显的效率优势,且月度进尺越高,机械化施工成本较人工开挖成本越低。

[关键词]高速铁路;隧道工程;机械化;优化;效益分析

[中图分类号]U455     [文献标识码]A     [文章编号]1002-8498(2021)04-0076-04

Optimization and Benefit Analysis of Mechanized Construction of Full Section Tunnel in Weak Surrounding Rock

LIU Jianguo

(The Third Engineering Co., Ltd. of China Railway 18th Bureau Group Co., Ltd., Zhuozhou, Hebei 072750, China)

Abstract: Combined with Sujiayan Tunnel of Zhengzhou Wanzhou High speed Railway, a set of mechanized supporting and optimization schemes suitable for the excavation of a full section tunnel in weak surrounding rock is summarized. It can be obtained through field practice that improving the drilling blasting effect and improving the quality of shotcrete can improve process efficiency and reduce cycle time. The full section excavation footage of weak surrounding rock can appropriately increase, and the 4.2m footage is safe and economical. Mechanical excavation has obvious efficiency advantages over manual excavation, and the higher the monthly footage, the more obvious the advantage of mechanized construction cost compared with manual excavation.

Keywords:high speed railway; tunnels; mechanization; optimization; benefit analysis

[作者简介]刘建国,工程师,Email: 2926058037@qq.com

 

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