摘要
以兰渝铁路毛羽山隧道为工程背景,利用数值模拟分析研究方法,优化研究超前导洞位于正洞的合理位置。通过建立超前导洞在不同位置的数值模型,从导洞开挖时的围岩变形情况、正洞扩挖后围岩变形情况及应力释放率三方面进行对比分析,研究了超前导洞位置对围岩变形的影响规律,确定了最优的超前导洞位置,以便结合监控量测数据指导高地应力软岩隧道施工。
Taking Maoyushan Tunnel of Lanzhou-Chongqing Railway as the engineering background,the author adopted the research method of numerical simulation analysis to optimize researches on the reasonable position of leading hole position in the main tunnel. Through establishing numerical models of leading hole in different positions,the author carried out comparative analyses from three aspects,namely,surrounding rock deformation situations while the leading hole excavating,surrounding rock deformation situations after the main hole excavating,and the stress release rate,researched influential rules of the leading hole positions on surrounding rock deformation,and determined the optimized position,so as to guide high crustal stress soft rock tunnel construction in combination with supervision data.
出处
《铁道建筑技术》
2016年第8期59-62,共4页
Railway Construction Technology
基金
中国铁建股份有限公司科技研究开发计划项目(13-C03)
关键词
高地应力
软弱围岩
超前导洞
应力释放
数值模拟
high crustal stress
weak surrounding rock
leading hole
stress release
numerical simulation
