TY - GEN
T1 - The ground reaction curve due to tunnelling under drainage condition
AU - Shin, Young Jin
AU - Kim, Byoung Min
AU - Han, Shin In
AU - Lee, In Mo
AU - Kim, Daehyeon
PY - 2008
Y1 - 2008
N2 - When a tunnel is excavated below the groundwater table, water flows into the excavated wall of tunnel and seepage forces are acting on the tunnel wall. Such seepage forces significantly affect the ground behavior. The ground response to tunnelling is understood theoretically by the convergence- confinement method, which consists of three elements: longitudinal deformation profile, ground reaction curve, and support characteristic curve. The seepage forces are likely to have a strong influence on the ground reaction curve which is defined as the relationship between internal pressure and radial displacement of the tunnel wall. In this paper, seepage forces arising from the ground water flow into a tunnel were estimated quantitatively. Magnitude of seepage forces was determined based on hydraulic gradient distribution around tunnel. To estimate seepage forces, different cover depths and groundwater table levels were considered. Using these results, the theoretical solutions for the ground reaction curve (GRC) with consideration of seepage forces under steady-state flow were derived. Copyright ASCE 2008.
AB - When a tunnel is excavated below the groundwater table, water flows into the excavated wall of tunnel and seepage forces are acting on the tunnel wall. Such seepage forces significantly affect the ground behavior. The ground response to tunnelling is understood theoretically by the convergence- confinement method, which consists of three elements: longitudinal deformation profile, ground reaction curve, and support characteristic curve. The seepage forces are likely to have a strong influence on the ground reaction curve which is defined as the relationship between internal pressure and radial displacement of the tunnel wall. In this paper, seepage forces arising from the ground water flow into a tunnel were estimated quantitatively. Magnitude of seepage forces was determined based on hydraulic gradient distribution around tunnel. To estimate seepage forces, different cover depths and groundwater table levels were considered. Using these results, the theoretical solutions for the ground reaction curve (GRC) with consideration of seepage forces under steady-state flow were derived. Copyright ASCE 2008.
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U2 - 10.1061/40971(310)49
DO - 10.1061/40971(310)49
M3 - Conference contribution
AN - SCOPUS:66549084234
SN - 9780784409718
T3 - Geotechnical Special Publication
SP - 394
EP - 401
BT - Proceedings of session of GeoCongress 2008 - GeoCongress 2008
T2 - GeoCongress 2008: Geosustainability and Geohazard Mitigation
Y2 - 9 March 2008 through 12 March 2008
ER -