Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay

Thesis (S.M.)--Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2013. === Cataloged from PDF version of thesis. === Includes bibliographical references (pages 129-133). === This thesis describes the development of a 3D finite element model for representing me...

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Main Author: Founta, Vasiliki
Other Authors: Andrew J. Whittle.
Format: Others
Language:English
Published: Massachusetts Institute of Technology 2013
Subjects:
Online Access:http://hdl.handle.net/1721.1/82836
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spelling ndltd-MIT-oai-dspace.mit.edu-1721.1-828362019-05-02T16:02:13Z Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay Founta, Vasiliki Andrew J. Whittle. Massachusetts Institute of Technology. Department of Civil and Environmental Engineering. Massachusetts Institute of Technology. Department of Civil and Environmental Engineering. Civil and Environmental Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2013. Cataloged from PDF version of thesis. Includes bibliographical references (pages 129-133). This thesis describes the development of a 3D finite element model for representing mechanized tunnel construction using an Earth Pressure Balance (EPB) machine in clay. The model uses the commercial FE code, Plaxis 3D, to represent the face pressure, conical shield, grouting process and activation of precast segmental concrete lining systems through a set of boundary conditions that advance through the soil mass along a prescribed trajectory. The model simulates ground conditions associated with on-going EPB tunnel construction for the Crossrail project in central London. The analyses use a linearly-elastic perfectly plastic (MC) soil model based on design profiles of undrained shear strength and stiffness characteristics of London Clay. The analyses show the importance of the in situ Ko-effective stress conditions on predictions of the free-field, short-term (i.e., undrained) ground movements caused by tunnel construction as well as the structural forces induced in the segmental lining. The results of the model are in good overall agreement with simulations from a more complex finite element model that uses sub-structing to represent the EPB machine (Kratos-ekate program; done in collaboration with the research group at TU Bochum). The results of this study form the basis for more extensive research on time dependent ground response and interactions with overlying structures. by Vasiliki Founta. S.M. 2013-12-06T20:47:40Z 2013-12-06T20:47:40Z 2013 Thesis http://hdl.handle.net/1721.1/82836 863222488 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 148 pages application/pdf Massachusetts Institute of Technology
collection NDLTD
language English
format Others
sources NDLTD
topic Civil and Environmental Engineering.
spellingShingle Civil and Environmental Engineering.
Founta, Vasiliki
Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
description Thesis (S.M.)--Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2013. === Cataloged from PDF version of thesis. === Includes bibliographical references (pages 129-133). === This thesis describes the development of a 3D finite element model for representing mechanized tunnel construction using an Earth Pressure Balance (EPB) machine in clay. The model uses the commercial FE code, Plaxis 3D, to represent the face pressure, conical shield, grouting process and activation of precast segmental concrete lining systems through a set of boundary conditions that advance through the soil mass along a prescribed trajectory. The model simulates ground conditions associated with on-going EPB tunnel construction for the Crossrail project in central London. The analyses use a linearly-elastic perfectly plastic (MC) soil model based on design profiles of undrained shear strength and stiffness characteristics of London Clay. The analyses show the importance of the in situ Ko-effective stress conditions on predictions of the free-field, short-term (i.e., undrained) ground movements caused by tunnel construction as well as the structural forces induced in the segmental lining. The results of the model are in good overall agreement with simulations from a more complex finite element model that uses sub-structing to represent the EPB machine (Kratos-ekate program; done in collaboration with the research group at TU Bochum). The results of this study form the basis for more extensive research on time dependent ground response and interactions with overlying structures. === by Vasiliki Founta. === S.M.
author2 Andrew J. Whittle.
author_facet Andrew J. Whittle.
Founta, Vasiliki
author Founta, Vasiliki
author_sort Founta, Vasiliki
title Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
title_short Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
title_full Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
title_fullStr Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
title_full_unstemmed Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
title_sort numerical simulation of ground movements and structural forces in lining for earth pressure balance (epb) tunneling in clay
publisher Massachusetts Institute of Technology
publishDate 2013
url http://hdl.handle.net/1721.1/82836
work_keys_str_mv AT fountavasiliki numericalsimulationofgroundmovementsandstructuralforcesinliningforearthpressurebalanceepbtunnelinginclay
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