arc tunnel造句

• Study on the crack of double - arc tunnels and its prevention measures
  浅埋偏压连拱隧道开裂原因及防治措施
• The conclusions we draw can also play a directive role in highway double - arc tunnel construction
  所得结论对公路双连拱隧道的建设有重要的工程指导意义。
• In this paper we dissertate the common structure cross forms and excavating methods of highway double - arc tunnel home and abroad at the first part , and study common simulation methods of tunnel construction afterwards . based on the method of reversing and releasing the stress , and combined with the capacity of simulating continuous construction of ansys programme , we come up with the thought of using the method of applying virtual support force to release the stress step by step to realize the step - by - step release of initial stress during the tunnel construction simulation . with the help of design language of ansys , we develop a command to apply the virtual support force
  探讨了应用平面应变模型进行隧道施工过程模拟的常用方法，在“反转应力释放法”的基础上，结合ansys软件可以模拟连续施工的特点，提出利用“施加虚拟支撑力逐步释放法”来实现隧道施工过程中地应力随工序的逐步释放的思路，并且利用ansys的apdl设计语言，开发出施加虚拟支撑力的命令，实现了施工过程中应力的逐步释放，从而找到了一种模拟隧道施工过程的好方法。
• Then we simulate the common excavating methods of double - arc tunnel respectively , analyze the stress and strain of wall rock and support structure of each method , and recommend the best excavating method to construct double - arc tunnel in wall rocks of ii . then we analyze the " three headings method " in detail , and also simulate the effect of construction factor , stress releasing coefficient and secondary lining
  对实际工程中最常用的三种开挖方法分别进行了施工模拟，分析了它们各自的围岩和支护的受力变形规律，经比较后，得出了三导洞法是类围岩中修建连拱隧道的较好开挖方法的结论。