3-D numerical simulation; Building deformations; Continuous simulation; Finite element simulations; Simulation technique; Surface settlements; Tunnel excavation; Tunneling process; Civil and Structural Engineering; Computer Science Applications; Computer Graphics and Computer-Aided Design; Computational Theory and Mathematics; Building and Construction
Abstract :
[en] To provide realistic predictions of mechanized tunnel excavation-induced ground movements, this research develops an innovative simulation technique called hybrid modeling that combines a detailed process-oriented finite element (FE) simulation (submodel) with the computational efficiency of metamodel (or surrogate model). This hybrid modeling approach has three levels. In Level 1, a small scale submodel is cut out from the global model and the continuous simulations are conducted in this submodel. Level 2 deals with identification of uncertain soil parameters based on the measurements (e.g., surface settlements) during tunnel excavation. In Level 3, the tunneling process parameters (e.g., grouting pressure) can be optimized to control tunneling-induced ground movements or building deformations according to the design criterion. The proposed hybrid modeling approach is validated via a 3D numerical simulation of mechanized tunnel excavation. The results show the capability of the proposed approach to provide reliable model responses in the near field around the tunnel with reduced computational costs.
Disciplines :
Civil engineering
Author, co-author :
Zhao, Chenyang; Department of Civil and Environmental Engineering, Ruhr-Universität Bochum, Bochum, Germany
Hölter, Raoul; Department of Civil and Environmental Engineering, Ruhr-Universität Bochum, Bochum, Germany
König, Markus; Department of Civil and Environmental Engineering, Ruhr-Universität Bochum, Bochum, Germany
ALIMARDANI LAVASAN, Arash ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
External co-authors :
yes
Language :
English
Title :
A hybrid model for estimation of ground movements due to mechanized tunnel excavation
Publication date :
July 2019
Journal title :
Computer-Aided Civil and Infrastructure Engineering
This research has been supported by the German Research Foundation (DFG) through the Collaborative Research Center (SFB 837). This support is gratefully acknowledged. The authors express their sincerest reverence to Prof. Tom Schanz who passed away during this research for his unforgettable scientific contribution.informationGerman Research Foundation (DFG) through the Collaborative Research Center (SFB 837).This research has been supported by the German Research Foundation (DFG) through the Collaborative Research Center (SFB 837). This support is gratefully acknowledged. The authors express their sincerest reverence to Prof. Tom Schanz who passed away during this research for his unforgettable scientific contribution.
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