对隧道TBM导洞扩挖法施工的探讨与展望  

Discussion and Prospects on TBM Pilot-heading and Enlarging Method

作　　者：王立川[1,2] 陈海勇 王占军 徐润泽 潘建平[6] 陈宏宇[7] 

机构地区：[1]成都铁路局,四川成都610082 [2]中南大学土木工程学院,湖南长沙410075 [3]北京中铁隧建筑有限公司,北京100022 [4]中信重工洛阳矿山机械工程设计研究院,河南洛阳471039 [5]中铁建大桥工程局集团第二工程有限公司,广东深圳518083 [6]中铁十八局集团有限公司三南项目部,重庆400800 [7]中铁隧道集团一处有限公司,重庆401121

出　　处：《隧道建设》2015年第2期149-159,共11页Tunnel Construction

基　　金：国家科技支撑项目(2012BAG05B03)

摘　　要：介绍导洞法的概念及其作用,分析导洞法的特点及其适用条件。以2座已建成运营的单洞双线铁路隧道和1座施工图设计阶段的双洞6车道高速公路隧道共3座地质差异较大的特长隧道为依托,主要进行以工期关键工序——挖掘和初期支护为研究对象的工期方案模拟,并比对模拟方案工期与实际或施工图设计工期。认为:1)软弱破碎围岩比例高的单洞隧道应慎重采取TBM导洞法。2)仅用1台TBM单向导洞法取代工期性辅助导坑对单洞特长隧道而言是不可行的;在单洞特长隧道建设中,2台TBM相向实施TBM导洞法是可行的,但须具备设置辅助导坑的条件,辅助导坑宜按无轨双车道断面设置。3)在双洞特长隧道建设中,双洞各用1台TBM相向平行导洞法则有望取代工期性辅助导坑;双洞特长隧道实施TBM导洞法,在工期、成本(投资)、不良地质应对方面有明显优势。4)川渝地区广泛分布的泥岩、砂岩、砂质泥岩、泥质砂岩及其互层地层具有实施TBM导洞法的天然地质优势。最后对TBM导洞法的应用前景进行了展望。In this paper,the concept and effect of pilot-heading method are presented,and the characteristics and applicable conditions of pilot-heading method are analyzed. The construction schedules of 3 tunnels located in different geological conditions are simulated in terms of excavation and primary support,and comparison and contrast is made between simulated construction schedules and actual / designed construction schedules. Conclusions drawn are as follows：1） TBM pilot-heading method is not suitable for single-tube tunnels located in soft,weak and fractured strata; 2）Instead of other construction galleries,TBM pilot-heading method may be adopted for single-tube tunnels. 3） Twin TBM pilot-heading method is suitable for twin-tube extra-long tunnels, which has advantages in terms of construction schedule,cost and coping with unfavorable geological conditions; 4） TBM pilot-heading method is suitable for the construction of tunnels in Sichuan and Chongqing area. Finally,the application of TBM pilot-heading method isprospected.

关 键 词：隧道 TBM导洞扩挖法 钻爆法 

分 类 号：U45[建筑科学—桥梁与隧道工程]