摘要
本文研究了深埋黄土隧道在施工开挖过程中围岩与初期支护结构的变形特性及稳定性,通过对连霍高速公路古浪隧道围岩的变形进行现场监测与计算分析,采用有限元软件对隧道施工过程进行数值模拟分析。得出以下结论:对于深埋黄土隧道,在施工过程中超前支护尤其应加强拱顶和拱脚处支护结构的强度;应尽可能早的施作仰拱,减轻隧道底部的隆起;为了减轻拱铰处的应力集中现象,拱铰和仰拱之间应圆弧连接。
In this paper,the monitored and measured data in site of Gulang tunnel was taken to know the mechanics characteristic and stability of deep loess tunnel in shallow.The mechanics characteristic and stability of the early support in excavating-process was analyzed using finite element analysis method.In conclusion,to advance supporting tunnel and to strengthen the intensity of the top and the foot;as early as possible for invert to reduce the uplift of the bottom of the tunnel;arc joining arch hinge and invert to reduce the stress concentration.
出处
《低温建筑技术》
2011年第7期85-87,共3页
Low Temperature Architecture Technology
关键词
黄土隧道
施工监测
受力变形
稳定性
loess tunnel
cansruction monitoring
stressed deformation
stability
