Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2005.10a
- /
- Pages.601-612
- /
- 2005
Practical 2-Arch Road Tunnel Design in Mountainous area
산악지형에서 효율적인 2-Arch 터널의 설계사례
- Jeong, Kyeong-Han (Dodam Engineering and Construcion Co. Ltd) ;
- Lee, Joo-Gong (Dodam Engineering and Construcion Co. Ltd) ;
- Han, Sung-Su (Department of Tunnel, Dodam Engineering and Construcion Co. Ltd) ;
- Hwang, Yong-Sub (Construcion Division, Samsung Heavy Industries Co. Ltd) ;
- Kim, Ji-Sung (Construcion Division, Samsung Heavy Industries Co. Ltd)
- Published : 2005.10.07
Abstract
In mountainous area, Two parallel tunnels have been usually recognized as a road tunnel which has benefits in aspects of cost and stability. However, Design and construction of 2-Arch road tunnel are growing recently due to environmental destruction, compensation of land and difficulty of route separation. As studies are mainly undergoing on only guaranteeing stability and developing a waterproofing-drainage system to avoid water leakage through comprehension for characteristics of 2-arch tunnel behaviors, there is a tendency to evaluate quantity of support by empirical method with a tunnel which has a complicated cross-section and lack of construction ability. In this study, therefore, we made a plan of tunnel cross-section which had shown good construction ability and developed the waterproofing-drainage system which is able to solve the water leakage problem fundamentally by analyzing precedented 2-arch tunnels and investigating their sites in and out of nation. We also determined fixed quantity of support by a large-scale model test and numerical analysis. We want to contribute to 2-arch tunnel design hereafter introducing design procedure and method applied here.
Keywords
- 2-arch tunnel;
- waterproofing-drainage system;
- longitudinal distance;
- excavation procedure;
- large-scale model test