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Hydro-mechanical Behavior of a Circular Opening Excavated in Saturated Rockmass  

Lee Youn-Kyou (군산대학교 해양과학대학)
Shin Hee-Soon (한국지질자원연구원)
Publication Information
Explosives and Blasting / v.23, no.2, 2005 , pp. 23-35 More about this Journal
Abstract
Excavation of an opening in a saturated porous rock may lead to the development of pore pressure around the opening due to the redistribution of initial rock stresses. The built-up of pore pressure, in turn, may affect the mechanical behavior of rock mass and give the different pattern of stress distribution around the opening from that of the case where the coupling is neglected. In this study, the short time response of an opening excavated in saturated ground under anisotropic initial stress conditions was investigated numerically. Not on the wall of opening but at a short distance from the wall, the tangential stresses were peak during the short period after excavation when the hydro-mechanical coupling is considered.
Keywords
poroelasticity; shielding effect; hydro-mechanical coupling; tunnel;
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