Abstract 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.
Abstract：
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.
.Design and Analysis of a Double-Arch Tunnel with Concealed, Sprayed Irregular-Composite Mid-Wall[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(6): 147-151
2013, Vol. 50 