Analysis of tunnel excavation based on linear DFN-FEM modelling

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00363218" target="_blank" >RIV/68407700:21110/23:00363218 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.14311/APP.2023.40.0061" target="_blank" >https://doi.org/10.14311/APP.2023.40.0061</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.14311/APP.2023.40.0061" target="_blank" >10.14311/APP.2023.40.0061</a>

Result language
angličtina
Original language name
Analysis of tunnel excavation based on linear DFN-FEM modelling
Original language description
Simulations of tunnel excavations have to take into account the natural occurrence of joints and faults in the surrounding rock mass, which dominantly control its mechanical re-sponse. In this paper, we present work in progress toward 3D finite element analysis of excavation using equivalent rock-mass properties derived from stochastically generated dis-crete fracture networks (DFNs). To this end, the averaging scheme proposed by Oda et al. [1] is used. Presently, we solve the problem linearly for an incremental change of the stress state. The fracture’s stiffness is assumed to depend on the initial normal stress acting in direction normal to it. However, within the solved incremental step, we assume the fracture’s stiffness to be constant. This assumption is acceptable for small stress changes. Since the fractures repre-sented in the DFN model have preferred directions, the equivalent stiffness is anisotropic.
Czech name
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Czech description
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Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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