Abstract
This paper focuses on the design phase of I-BIM tunnelling projects using Sequential Excavation Method (SEM), in Europe, commonly referred to as the New Austrian Tunnelling Method (NATM), and addresses the problem of coupling geotechnical conditions and tunnelling Building Information Model (BIM) for the preparation of the computational model suitable for the finite element analysis method (FEM). The review of the literature led to the conclusion that an automatic merging of the tunnel model and ground model for use in the FEM software is currently not reliable due to the number of differences between various types of models as they serve contrasting needs. Consequently, modelling becomes a manual task, which is very time-consuming and error prone. In this paper, we present the development of a framework for the semiautomatic transformation of the various tunnelling models and respective ground models into the model suitable for further analysis. We conclude that the import and translation of the geometry into the FEM software are most successful and accurate when the initial I- BIM (tunnel) model is prepared at a level of detail appropriate for a computational model. The result is the I-BIM model, fit for use in the FEM software which speeds up the modelling process and reduces errors. We have shown that it is possible to prepare the geometry of a tunnel in the BIM software, transfer it, and use it in the software for geotechnical analysis. This makes the preparation of the tunnel geometry for FEM analysis much easier and faster. Due to the fast preparation of the geometry of the new model, the approach presented in this research is useful in practice. The applicability of the framework and the framework workflow are both presented through a practical case study.
Highlights
Transportation infrastructure can be considered the backbone of any economy, as reliable, safe, and efficient movement of goods and citizens greatly enhances economic and social development [1]
The transfer of the tunnel excavation geometry from the Building Information Model (BIM) model to the finite element analysis method (FEM) analysis software according to the proposed method was successful
It is true that the geometry has to be designed for the computational model, but since this process is almost automated, much less effort is required. is means that the proposed approach is considerably better in terms of time efficiency if compared to creating a new tunnel geometry in a FEA program or correcting the imported geometry of the BIM model
Summary
Robert Klinc ,1 Dani Gabrscek, Jure Cesnik, Marko Zibert, Martin Hostnik, and Janko Logar 1. We present the development of a framework for the semiautomatic transformation of the various tunnelling models and respective ground models into the model suitable for further analysis. We conclude that the import and translation of the geometry into the FEM software are most successful and accurate when the initial I- BIM (tunnel) model is prepared at a level of detail appropriate for a computational model. E result is the I-BIM model, fit for use in the FEM software which speeds up the modelling process and reduces errors. We have shown that it is possible to prepare the geometry of a tunnel in the BIM software, transfer it, and use it in the software for geotechnical analysis. Due to the fast preparation of the geometry of the new model, the approach presented in this research is useful in practice. Due to the fast preparation of the geometry of the new model, the approach presented in this research is useful in practice. e applicability of the framework and the framework workflow are both presented through a practical case study
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