Browse > Article
http://dx.doi.org/10.9711/KTAJ.2014.16.1.075

Influence analysis of continuous pile walls on the behavior of a soil tunnel at the shallow depth through a parametric study  

You, Kwang-Ho (Dept. of Civil Eng., Univ. of Suwon)
Yoon, Woo-Jin (Dept. of Civil Eng., Univ. of Suwon)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.16, no.1, 2014 , pp. 75-89 More about this Journal
Abstract
In recent years, utilization of underground space has been increasing in various parts of the world. In particular, open-cut method is usually applied to the shallow depth excavation. However some problems such as extreme traffic congestion and unstability of adjacent structures etc. might occur. In order to cope with these problems, the M-CAM (Modified Cellular Arch Method) method was proposed to excavate soil tunnels at shallow depth with secured enough stability and minimized construction period. In this study, sensitivity analysis was performed to predict the influence of the size of CPW(Continuous Pile Wall) and ground conditions on the behavior of the tunnel. First of all, embedded depth and diameter (or thickness) of CPW, coefficient of lateral earth pressure, and ground conditions were selected as parameters that could affect tunnel stability. Meanwhile, FLAC 2D based on finite difference method was used for numerical analysis. As a result of this study, it was checked out that embedded depth among sizes of CPW had a greatest influence on the stability of a tunnel.
Keywords
Modified Cellular Arch Method; Continuous Pile Wall; Finite Difference Method; Factor of Safety;
Citations & Related Records
연도 인용수 순위
  • Reference
1 You, K.H., Park, Y.J., Kang, Y. (2001), "A numerical study on the estimation of safety factor of tunnels excavated in jointed rock mass", Journal of the Korean Society for Rock Mech., Vol. 11, No. 3, pp. 279-288.   과학기술학회마을
2 You, K.H., Park, Y.J., Hong, K.Y., Lee, H.K., Kim, J.K. (2005), "Numerical estimation for safety factors of tunnels considering the failure of supports", Journal of the Korean Tunnelling Association, Vol. 7, No. 1, pp. 37-48.
3 You, K.H., Yoon, W.J., Park, G.S., Cho, H., Lim, J.S. (2013), "A study on the stability of M-CAM construction method using finite difference method", Korean Society of Civil Engineers Conference, pp. 950-953.
4 Dawson, E.M., Roth, W.H., Drescher, A. (1999), "Slope stability analysis by strength reduction", Geotechnique, Vol. 49, pp. 835-840.   DOI   ScienceOn
5 Duncan, J.M. (1996), "State of the art : limit equilibrium and finite element analysis of slopes", Journal of Geotechnical Engineering, Vol. 122, pp. 577-596.   DOI   ScienceOn
6 Bishop, A.W. (1955), "The use of pore pressure coefficient in practice", Geotechnique, Vol. 5, pp. 7-17.
7 You, K.H., Park, Y.J., Bae, G.J. (2000), "An assessment of safety factor for tunnels excavated in a weak rock layer", Journal of the Korean Tunnelling Association, Vol. 2, No. 3, pp. 47-57.
8 Itasca Consulting Group, Inc. (2005), Fast Lagrangian Analysis of Continua, Ver. 5.0, Itasca Consulting Group, Minnesota, USA.
9 Kim, U.J., Sohn, Y.J., Cho, H., Lim, J.S. (2010), "Tunnel design of using M-CAM method", Korean Society of Civil Engineers Conference, pp. 1748-1751.
10 Lim, J.S., Choi, J.H., J, H. (2011), "Tunneling method of using continuous pile wall at shallow depth", Journal of the Korea Association of Geotechnical Professional Engineers, Vol. 8, No. 1, pp. 3-10.