摘要
利用有限元程序模拟了Ⅴ级围岩深埋地质条件下大跨度隧道的动态施工过程,以隧道施工后周边围岩稳定性和初期支护及临时支护安全性为指标比较了CD法和CRD法的开挖效果。结果表明,CRD法是该级围岩条件下的合理工法,同时给出了二次衬砌应滞后掌子面的合理距离。
Simulating the course of dynamic construction of large-span tunnd on geology condition of five-grade rock mass and deep-bury by finite element programming, the excavation effect of CD method is comapared with the effect of CRD method obased on safety of the rock mass around and preliminary lining and temporary lining. The result indicates that the CRD method is the proper construction method on this condition and gives the proper distance between the second lining and the excavation face.
出处
《地下空间与工程学报》
CSCD
2005年第6期844-847,共4页
Chinese Journal of Underground Space and Engineering
关键词
大跨度隧道
施工方法
初期支护
临时支护
安全性
large- span tunnel
construction method
preliminary lining
temporary lining
safety
