| 
  
MODERN TUNNELLING TECHNOLOGY   2018, Vol. 55   Issue (3) :1-5    DOI:                                                                                                      | 
  
      
  | 
  ||||
| Technical Challenges of Super-Long Mountainous Tunnels at Great Depth | ||||
| (1 China Railway Academy Co., Ltd, Chengdu 611731; 2 International Tunnelling and Underground Space Association, Geneva 1219) | ||||
Copyright 2010 by MODERN TUNNELLING TECHNOLOGY 
      |