Numerical modeling of the pathological case of a damaged tunnel application to Djebel El-Ouahch tunnel (east–west highway)
Tóm tắt
This work deals with a numerical analysis of a pathological case of a part of tunnel T1 of Djebel El-Ouahch which suffered a collapse. The pathological analysis of state of stress and state of deformation in the soil and in the tunnel wall was examined. Numerical modeling is performed in 3D space using the PLAXIS 3D TUNNEL calculation code which is based on the finite element method; the behavior of the soil is described by the elastoplastic model of Mohr–Coulomb. The results are presented in terms of settlement at ground free surface, vertical displacement under the tunnel floor, stresses, and deformations developed at the tunnel retaining level and in the ground around retaining to be able to analyze the causes of the collapse.
Tài liệu tham khảo
AFTES 1, French Association of Works in Underground. (2003). Characterization of the rock massifs useful for the study and the realization of the underground works, GT1, 88.
AFTES 2, French Associations of Underground Works. (2003). Cicatrisation of rock masses useful for the design and construction of underground constructions, tunnel and underground works (no. 177, pp. 2–492).
Bellwald, P. (1990). A contribution to the design o f tunnels in argillaceous rock. P h D Thesis. Massachusetts Institute o f technology. Boston, USA.
Bultel, F. (2001). Consideration of the swelling of the ground in the sizing of the tunnels coverings. Engineering sciences [physical]. National School of Roads and Bridges, 2001 French.
Chen, F. H. (1965). The use of piers to prevent the uplifting of lightly loaded structures founded on expansive soils. In: Engineering effects of moisture changes in soils. Concluding Proceedings, International Research and Engineering Conference on Expansive Clay Soils (pp. 152–171). Texas: A&M Press.
Chen F.H. (1975). Foundations on expansive soils. Developments in Geotechnical Engineering (vol. 12). Elsevier.
Einstein, H.H., & Bischoff, N. (1975). Design of tunnels in swelling rock. In Proceedings of the 16th U.S Symposium on Rock Mechanics (USRMS), 22-24 September, Minneapolis, Minnesota. ARMA-75-185.
Grasso, P., Chiriotti, E., & Xu, S. (2004). Risk control, an essential approach in the development of tunnel studies in difficult terrain. French Review of Geotechnics, 109, 3–21.
Idris, J. (2007). Geotechnical accidents in tunnels and underground structures-analytical methods for feedback and numerical modeling. Geo-mechanical Environmental Laboratory and Mining Works-School in Nancy, National Polytechnic Institute of Lorraine, Nancy University.
Kerisel, J. (1975). Old structures in relation to soil conditions, Geotechnique (vol. 25, no.3, pp. 433–483). Lama R.D., Vutukuri V.S., 1978.
Levy, M. (2000). The consideration of risk in materials and works cases of tunnels, Risk and civil engineering, proceedings of the symposium (pp. 427–451). Paris: UNESCO, Presses of the National School of Bridges and Roadway.
Oggeri, C., & Ova, G. (2004). Quality in tunnelling: ITA-AITES working group 16 final reports. Tunnelling and Underground Space Technology, 4, 239–272.
Panet, M. (1995). The calculation of tunnels by the convergence-confinement method. Presses of the ENPC.
Panet & Guellec. (1974). Contribution to the study of retaining a tunnel at the back of the face. 1974. In Proc. 3th Int. Cong. Rock Mech., Denver, Vol. IIB.
Panet, M., & Guenot, A. (1982). Analysis of convergence behind the face of a tunnel. In Proceedings international symposium tunnelling (vol. 82, pp. 197–204). Brighton.
Panet M., Guenot A. (1982). Analysis of convergence behind the face of a tunnel. In Proceedings of the ISRM symposium: Tunnelling 82’, Brighton (pp. 199–204).
Mouroux P., Margron P., & Pinte, J.C. (1988). Economic construction on swelling soils. BRGM, manuals and methods, RexCoop (Construction Plan) (p. 126).
Robert & Fabre. (1987). Report on swelling. French Committee of Rock Mechanics (CFMR).
Steiner, W. (1993). Swelling rock in tunnels: Rock characterizations, effect of horizontal stresses and construction procedures. International Journal of Rock Mechanics and Mining Sciences, 30(4), 361–380.
Terzaghi, K. (1946). Rock defects and loads in tunnels supports. In R.V Proctor, T.L White. Rock tunneling with steel supports, (Ed.), tunnels supports (pp. 17–99). Youngstown, Ohio: The commercial shearing and stamping Co.