national trunk highway造句

• Mark rules of highway route name and number of national trunk highway
  公路路线标识规则国道名称和编号
• A study on the flood damage treatment technique at chongqing shandong section of national trunk highway no
  国道319重庆山洞段公路水毁处治技术研究
• Research on the flood damage treatment technique at shandong section of chongqing of national trunk highway no
  国道319重庆山洞段公路水毁处治技术研究
• Code for highway and main formation and administration maintenance organizations . code for national trunk highway of traffic volume observation station
  公路及主要构筑物管理养护单位代码国道交通量观测站代码
• Associated with a project of the planned xuefengshan tunnel with 7 . 6 km long during the construction of shaoyang to huaihua expressway in hunan province of shanghai to ruili national trunk highway , this paper firstly makes an introduction of the frequently - used analysis & computation methods for tunnel supporting structure . then , based on the analysis of the basic theory about the interaction mechanism of surrounding rock and support structure , a spatial computation model is made , a coupling numerical computation method with 3 - d elastic - plastic finite element and infinite element is proposed , and a comprehensive analysis has been made to the effects of the overall stability and safety of the surrounding rocks of different characteristics , different classes and under different construction methods . and thus the problem of 3 - d infinite region to which applying the general finite ca n ' t do has been resolved
  6公里的雪峰山隧道工程，首先介绍了隧道支护结构的常用分析计算方法；然后通过对隧道施工过程中，洞室稳定性与支护结构相互作用机理的深入分析，建立了隧道施工过程的空间计算模型，提出了采用三维弹塑性有限元-无限元耦合的数值计算方法，综合分析了隧道在不同围岩特性和围岩类别条件下，以及不同施工开挖方案等对隧道围岩整体稳定和安全性的影响，从而解决了通用有限元方法难以解决的隧道三维无限域问题；其可充分发挥有限元法在分析非线性方面的有效性和成熟性，以及无限元法在分析处理无限域和半无限域方面的精确性和简便性，为隧道施工过程中围岩的稳定性分析开辟了一条新的途径。