摘要
文章结合广惠高速公路小金口双连拱隧道工程(Ⅲ类围岩),开展大型相似模型试验研究和有限元数值分析,阐述了双连拱隧道的内力样式(二次衬砌的轴力和弯矩), 得出双连拱隧道的两边墙脚、中墙底部和顶部的弯矩值较大,尤其是中墙的受力特征将直接决定双连拱隧道围岩的整体稳定性。
A large-scale model test by using analogous materials is carried out together with the numerical finite element analysis to study the structure of Xiaojinkou double-arch tunnel (embedded in surrounding rock category III) on the Guanghui (Guangzhou-Huizhou) high speed highway. The internal forces in the secondary lining are obtained and it is shown that bending moments at the bottom of two side walls, at the bottom and top of the intermediate wall are comparatively large and the stress condition of the intermediate wall will directly affect the stability of the tunnel and surrounding rock.
出处
《现代隧道技术》
EI
北大核心
2005年第1期6-10,共5页
Modern Tunnelling Technology
关键词
双连拱隧道
模型试验
有限元数值分析
结构内力模型
Double-arch tunnel
Model test
Numerical finite element analysis
Internal forces of structure
