根据莫尔—库仑强度理论推导了关于确定并行隧道合理间距的安全系数s。
Based on the Mohr-Coulomb theory, safety factor s was deduced and used to ensure the reasonable parallel tunnel distance and judge the stability of surrounding rock effectively.
随着城市地下空间的进一步开发，近距离并行隧道施工、盾构隧道近距离相互穿越与日俱增。
With the development of city underground space, there are more and more projects come out in each passing day, in which tunnels are built much close to existing tunnel.
为了模拟并行隧道分步开挖和并行开挖两种方式即在不同应力释放程度下的实际变形究竟有多大差别，本文针对重塑粉土和原状土进行了不同剪切路径下的变形特性试验研究。
To simulate the difference of deformation of multi-step excavation and simultaneous excavation in double metro tunnels, a group of remoulded soil and undisturbed soil test has been carried out.
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