Analyses of tunnel stability under dynamic loads

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Title: Analyses of tunnel stability under dynamic loads
Authors: Oraee, B
Hosseini, N
Oraee, K
Gholinejad, M
Item Type: Conference Paper
Abstract: Tunnels as any other structures are affected by different loads and stresses. Generally, the loads on tunnels consist of both static and dynamic loads. These loads must both be considered in the tunnel design process. In this paper, the stability state of Jiroft water-transform tunnel is evaluated. Firstly, the in-situ stresses and then using Kirschs equations the induced stresses due to static loads in walls and crown of tunnel are calculated. Consequently, the strain caused by probable earthquake without considering the interaction between the concrete lining of tunnel and rock mass using seismic analysis is calculated based on free-field deformation. When the strain is determined, the simplified method of closed-form solution, Wangs equations and Penziens equations are used to estimate the applied forces on the tunnel due to earthquake such as axial force and bending moment on a tunnel section taking into account the interaction of the tunnel concrete lining and rock mass. Results of this study show that the loads applied to the tunnel as a result of earthquake waves can be affect the stability of underground structures, especially long structures such as tunnels.
Content Version: Accepted version
Issue Date: 12-Sep-2011
URI: http://hdl.handle.net/10044/1/6385
Publisher Link: http://www.smenet.org/
Publisher: Society for Mining, Metallurgy & Exploration
Presented At: Society for Mining, Metallurgy & Exploration Annual Meeting & Exhibit and CMA 113th National Western Mining Conference "Shaping a Strong Future Through Mining"
Copyright Statement: © 2011 SME
Conference Location: Denver, Colorado, U.S.A
Appears in Collections:Centre for Environmental Policy



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