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4月21～27日铁道部在北京召开了《铁路隧道设计规范》审查会。会议对规范送审稿中存在的主要问题展开了热烈讨论,认为:隧道按长度分类是必要的,特长隧道与长隧道宜以10公里分界;围岩分类、线路平纵断面与轨道等章节内容应与有关规范协调;关于偏压与明洞回填土压力问题,规范条文中仅述计算原则,计算公式列入附录;拱、墙防排水要求可
April 21 ~ 27 Ministry of Railways held in Beijing, “Railway Tunnel Design Code” review. The meeting heated discussion on the main problems existing in the draft of the draft for review. It is believed that it is necessary to classify the tunnels according to the length, and the special tunnels and the long tunnels should be delimited by 10km. The sections of the surrounding rock classification, Should be coordinated with the relevant norms; on the bias and the pressure of backfill in Myeongdong, only the calculation principles of the provisions of the provisions of the formula included in the appendix; Arch, wall drainage requirements