摘要
以宁(南京)淮(安)高速公路老山公路隧道为依托,对洞口前置式洞口施工过程的力学行为进行了三维数值模拟,分析了洞口段围岩和前置式支护结构体的位移场、应力。计算结果表明:前置支护结构及两洞间土体对洞口山体的支撑作用明显,既可大大减少洞口的边、仰坡开挖量保护洞口环境,又能有利于洞口段稳定和洞口施工安全。
The construction process of advanced entrance of highway tunnel was simulated, and the stress and displacement in surrounding rock and advanced support structure were analyzed based on the actual conditions of Laoshan highway tunnel located on Nanjing-Huaian Highway. It was shown that the advanced support structure and soil body between the two tunnels had good effect on the slope stability of mountain. The construction of advanced entrance of highway tunnel was beneficial not only to the reduction of the amount of slope excavation but also to the stability and safety of the tunnel entrance.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2007年第4期484-489,共6页
Chinese Journal of Geotechnical Engineering
关键词
公路隧道
前置式洞口工法
施工过程
数值分析
highway tunnel
advanced entrance construction method
construction process
numerical simulation
