山区软岩大跨大断面四线铁路车站隧道二衬施工技术研究

摘要

对大跨大断面隧道，特别是在浅埋且围岩地质条件较差的情况下，为保证隧道衬砌施工过程中的安全，尽可能采用整体衬砌。以位于贵昆线六盘水至沾益段增建二线工程上的乌蒙山二号隧道出口四线车站隧道为例，结合现场实际施工，对山区软岩大跨大断面四线隧道整体二次衬砌进行了研究，所得成果可为今后类似工程提供参考。%As for the large cross section tunnels, especially these which are shallowly buried in the relatively weak geolog- ical conditions, in order to ensure construction safety during the tunnel lining construction process, the monolithic lining is preferable. Based on the four-line railway station tunnel located in exit section of Wumeng Mountain Second Tunnel, this article carries out in-depth studies on the final lining construction technology for four-line tunnel in weak rock, and some of the result can provide a reference for similar projects in the future.