TY - JOUR
T1 - Risk analysis during tunnel construction using Bayesian Networks
T2 - Porto Metro case study
AU - Sousa, Rita L.
AU - Einstein, Herbert H.
N1 - Funding Information:
The authors would like to acknowledge The Fundação para a Ciência e Tecnologia (FCT) for the funding it has provided to this project through a doctoral research fellowship and the Porto Metro Authorities for generously allowing us to use data from the construction of the Porto metro, without which this work would not have been possible.
PY - 2012/1
Y1 - 2012/1
N2 - This paper presents a methodology to systematically assess and manage the risks associated with tunnel construction. The methodology consists of combining a geologic prediction model that allows one to predict geology ahead of the tunnel construction, with a construction strategy decision model that allows one to choose amongst different construction strategies the one that leads to minimum risk. This model used tunnel boring machine performance data to relate to and predict geology. Both models are based on Bayesian Networks because of their ability to combine domain knowledge with data, encode dependencies among variables, and their ability to learn causal relationships. The combined geologic prediction-construction strategy decision model was applied to a case, the Porto Metro, in Portugal. The results of the geologic prediction model were in good agreement with the observed geology, and the results of the construction strategy decision support model were in good agreement with the construction methods used. Very significant is the ability of the model to predict changes in geology and consequently required changes in construction strategy. This risk assessment methodology provides a powerful tool with which planners and engineers can systematically assess and mitigate the inherent risks associated with tunnel construction.
AB - This paper presents a methodology to systematically assess and manage the risks associated with tunnel construction. The methodology consists of combining a geologic prediction model that allows one to predict geology ahead of the tunnel construction, with a construction strategy decision model that allows one to choose amongst different construction strategies the one that leads to minimum risk. This model used tunnel boring machine performance data to relate to and predict geology. Both models are based on Bayesian Networks because of their ability to combine domain knowledge with data, encode dependencies among variables, and their ability to learn causal relationships. The combined geologic prediction-construction strategy decision model was applied to a case, the Porto Metro, in Portugal. The results of the geologic prediction model were in good agreement with the observed geology, and the results of the construction strategy decision support model were in good agreement with the construction methods used. Very significant is the ability of the model to predict changes in geology and consequently required changes in construction strategy. This risk assessment methodology provides a powerful tool with which planners and engineers can systematically assess and mitigate the inherent risks associated with tunnel construction.
KW - Bayesian Networks
KW - Risk
KW - Tunneling
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U2 - 10.1016/j.tust.2011.07.003
DO - 10.1016/j.tust.2011.07.003
M3 - Article
AN - SCOPUS:82855175190
SN - 0886-7798
VL - 27
SP - 86
EP - 100
JO - Tunnelling and Underground Space Technology
JF - Tunnelling and Underground Space Technology
IS - 1
ER -