摘要
我国是一个多山的国家,也是世界上公路隧道最多的国家。在一些山区高速公路中,双向4车道乃至双向6车道公路隧道已不能适应交通量日益增长的需求,在原有公路隧道基础上改建或新建成为双向8车道公路隧道的建设显得尤为迫切。单洞原位扩建隧道有单侧扩建、两侧扩建和周围扩建3种形式。通过大帽山隧道IV、V级围岩3种原位扩建形式的数值分析,得出采用单侧原位扩建的合理性。
China is a mountains country with the most highway tunnels in the world.In some expressways in mountainous areas,bi-directional 4-lane,even 6-lane highway tunnels are no longer adaptable to daily increasing demand of traffic volume,so the reconstruction based on original highway tunnels or new construction of bi-directional 8-lane highway tunnels is particularly stringent.Single-side expansion,double-side expansion and peripheral expansion are 3 modes for single-cave tunnels at original position.Based on a numerical analysis for 3 expansion modes at original position on wall rock of grades IV and V in Damaoshan Tunnel,this paper acquires reasonability of single-side expansion at original position.
出处
《公路交通技术》
2010年第5期93-97,共5页
Technology of Highway and Transport
关键词
隧道
原位扩建
4车道大断面隧道
tunnel
expansion at original position
4-lane large-section tunnel
