3D Modeling of an NATM Tunnel in High K0 Clay Using Two Different Constitutive Models

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F09%3A00014330" target="_blank" >RIV/00216208:11310/09:00014330 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
3D Modeling of an NATM Tunnel in High K0 Clay Using Two Different Constitutive Models
Original language description
This paper studies the accuracy of the three-dimensional ?nite-element predictions of a displacement ?eld induced by tunneling using new Austrian tunneling method NATM in stiff clays with high K0 conditions. The studies are applied to the Heathrow express trial tunnel. Two different constitutive models are used to represent London Clay, namely a hypoplastic model for clays and the modi?ed Cam-clay MCC model. Good quality laboratory data are used for parameter calibration and accurate ?eld measurements are used to initialize K0 and void ratio. The hypoplastic model gives better predictions than the MCC model with satisfactory estimate for the displacement magnitude and slightly overestimated width of the surface settlement trough. Parametric studies demonstrate the in?uence of variation of the predicted soil behavior in the very-small-strain to large-strain range and the in?uence of the time dependency of the shotcrete lining behavior.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JM - Structural engineering
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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