期刊
COMPUTERS AND GEOTECHNICS
卷 144, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2022.104637
关键词
Computational tunnel advancement simulation; Mechanized tunneling; CAD-based design; Fictitious domain method; Cut finite element method
类别
资金
- German Research Foundation (DFG) [SFB 837, 77309832]
- German Research Foundation through the DFG Emmy Noether Award [SCH 1249/2-1]
This paper presents a computational framework based on the cut finite element method (CutFEM) for process-oriented simulation in mechanized tunneling. The framework allows for the modeling, discretization, and coupling of various components and enables the analysis of multiple tunnel alignment variants using the same mesh. It facilitates the integration of geometric, building information, and simulation models in early stages of a tunnel project.
We describe a novel computational framework based on the cut finite element method (CutFEM) for process-oriented simulation in mechanized tunneling. The framework incorporates all relevant components required for the simulation of the tunnel advance process, namely the ground, the staged installation of the lining support, the tail void grouting and the tunnel boring machine. We demonstrate that CutFEM concepts can significantly facilitate the modeling, discretization and coupling of the different components, while maintaining the same accuracy as the standard boundary-fitted finite element method. The proposed CutFEM technology, which is being applied and investigated in the context of advancement simulations in mechanized tunneling for the first time, enables the seamless analysis of an arbitrary number of different tunnel alignment variants on the same structured background mesh without the need to set up a new model for each variant. This is a shift of paradigm in simulation-supported tunnel design, as the CutFEM based framework considerably facilitates a direct integration of geometric, building information and simulation models in early stages of a tunnel project. The simulation model allows for the damage assessment of the buildings during tunnel advancement with regards to different excavation scenarios, as shown in the numerical examples in this paper.
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