摘要
利用研制成功的公路隧道结构与围岩综合实验系统 (CTSSSRH) ,以渝黔高速公路重庆段真武山隧道为例 ,对大跨度扁坦隧道的开挖过程进行了 1∶ 36的大比例尺相似模型实验 ,并建立了相似模型四分部开挖方法及全断面法、上下台阶法、左右分部法的三维力学模型 ,用 3D-σ程序分别对其动态施工过程进行了数值分析。同一开挖方法同一施工阶段相应测点的围岩位移对比表明 。
Based on the comprehensive testing system for structure and surrounding rockmass of highway tunnel (CTSSSRH), taking Zhenwu Mt. Tunnel as an example, a test concerning the dynamic construction procedure of large span flat tunnel with different methods of excavation is carried out through physical analogic modeling. Then, the yield initiation is assumed to occur following Coulomb Mohr failure criterion. The displacement and its mechanics properties for different construction methods are compared by building related mechanical analytical model and analyzing with three dimensional elasto plastic FEM code (3D σ).The calcultions show the both displacements matched well.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2000年第5期567-572,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
交通部科技进步"通达计划"项目!( 95 0 42 2 14 )
关键词
大跨度扁坦隧道
有限元相似模拟
数值分析
large span flat tunnel, 3D elasto plastic FEM, physical simulation, numerical analysis
