Design and analysis of a double-arch tunnel with concealed, sprayed irregular-composite mid-wall

作者：Zhang Wanbin^*; Li Haijun; Wang Mingnian

来源：Modern Tunnelling Technology, 2013, 50(6): 147-151.

• 3D finite element model
• Concealed irregular middle-wall
• Construction efficiency
• Double-arch tunnels
• Efficient construction
• Rock pillar
• Sprayed steel fiber concretes
• Structure durability

To improve the effects of waterproofing, drainage, structure durability, and construction efficiency of double-arch tunnels, this paper analyzes the state of the art indesign and construction methods for double-arch tunnels, addresses associated problems, and puts forward a new structural type which can effectively guarantee efficient construction by using a concealed irregular middle-wall installed using one-pass sprayed steel fiber concrete. Additionally, construction safety can be guaranteed by the enlarged foundation and protection from the reserved rock pillar. Installing an independent waterproofing and drainage system and a secondary lining with equal thickness results in better performance regarding waterproofing and drainage as well as structure durability. In this paper, a 3D finite element model is created. The results show that this type of structure can ensure safe and rapid double-arch tunnel construction for various working procedures.

• 出版日期2013
• 单位西南交通大学