摘要
针对大断面公路隧道改扩建施工方案,文章依托国内第一座双洞四车道公路隧道原位扩建为双洞八车道公路隧道的工程实践,采用相似模拟和数值计算相结合的方法,研究软弱围岩条件下隧道改扩建施工开挖方案,得到了大断面原位扩建隧道施工的围岩变形、应力变化规律,提出了先新建再扩建的组合施工方案,可为公路隧道及类似地下工程建设提供参考。
A redevelopment scheme for highway tunnels with large cross sections is presented using analog simula- tions and numerical calculations to study the law of surrounding rock deformation and stress variation during in-situ reconstruction of a large cross section tunnel in weak surrounding rock based on the first domestic in-situ recon- struction of a highway tunnel expanded from a twin-tube, four-lane highway tunnel into a four-tube, eight-lane tun- nel. A combined construction scheme is set forth in which new construction goes before expansion, providing a refer- ence for highway tunnels and similar underground works.
出处
《现代隧道技术》
EI
CSCD
北大核心
2016年第5期145-153,160,共10页
Modern Tunnelling Technology
关键词
隧道
改扩建
施工开挖
相似模拟
数值计算
Tunnel
Redevelopment
Excavation
Analog simulation
Numerical calculation
