Article (Scientific journals)
Numerical investigation of tunneling in saturated soil: the role of construction and operation periods
ALIMARDANI LAVASAN, Arash; Zhao, Chenyang; Barciaga, Thomas et al.
2018In Acta Geotechnica, 13 (3), p. 671 - 691
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Keywords :
Consolidation analysis; Hydraulic conductivity; Hydromechanical coupling; Infiltration; Mechanized tunneling; Saturated soil; Geotechnical Engineering and Engineering Geology; Earth and Planetary Sciences (miscellaneous)
Abstract :
[en] This paper numerically investigates the slurry shield tunneling in fully saturated soils with different hydraulic conductivities in short- and long-term scales. A fully coupled hydromechanical three-dimensional model that accounts for the main aspects of tunnel construction and the hydromechanical interactions due to tunneling process is developed. An elasto-plastic constitutive model obeying a double hardening rule, namely hardening soil model, is employed in the numerical simulations. The research mainly focuses on assessing the influence of soil hydraulic conductivity and the method to simulate backfill grouting in the tail void on the evolution of ground subsidence, excess pore water pressure and lining forces. Two different consolidation schemes have been taken into account to computationally address the tunnel construction in soil with low and high hydraulic conductivities. In addition, different methods are employed to simulate the tail void grouting as a hydromechanical boundary condition and to study its effects on the model responses. Finally, the influences of infiltration of the fluidized particles of grouting suspension into the surrounding soil and its corresponding time–space hydraulic conductivity evolution on the displacements and lining forces are studied.
Disciplines :
Civil engineering
Author, co-author :
ALIMARDANI LAVASAN, Arash  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
Zhao, Chenyang;  Chair of Foundation Engineering, Soil and Rock Mechanics, Ruhr-Universität Bochum, Bochum, Germany
Barciaga, Thomas;  Chair of Foundation Engineering, Soil and Rock Mechanics, Ruhr-Universität Bochum, Bochum, Germany
Schaufler, Alexander;  Institute of Mechanics, Ruhr-Universität Bochum, Bochum, Germany
Steeb, Holger;  Institute of Mechanics (CE), University of Stuttgart, Stuttgart, Germany ; Stuttgart Research Center for Simulation Technology (SRC Sim Tech), Stuttgart, Germany
Schanz, Tom;  Chair of Foundation Engineering, Soil and Rock Mechanics, Ruhr-Universität Bochum, Bochum, Germany
External co-authors :
yes
Language :
English
Title :
Numerical investigation of tunneling in saturated soil: the role of construction and operation periods
Publication date :
June 2018
Journal title :
Acta Geotechnica
ISSN :
1861-1125
eISSN :
1861-1133
Publisher :
Springer Verlag
Volume :
13
Issue :
3
Pages :
671 - 691
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Deutsche Forschungsgemeinschaft
Funding text :
Financial support was provided by the German Science Foundation (DFG) in the framework of the Collaborative Research Center SFB 837 (subprojects A5 and B4), and the first author was sponsored through a scholarship by Alexander von Humboldt Foundation, Germany. These supports are gratefully acknowledged.
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