第１部門④

[21006-11-05] Reliability Assessment of Multivariate soil Properties under Offshore Airport Using Large-Scale Generic Database and Hierarchical Bayesian Model(Proceedings of Symposium on Applied Mechanics)

*Taiga Saito¹, Yu Otake¹, Stephen Wu², Daiki Takano³, Ikumasa Yoshida⁴ (1. Tohoku University, 2. The Institute of Statistical Mathematics, 3. Port and Airport Research Institute, 4. Tokyo City University)

Keywords:Hierarchical Bayesian model, Soil property prediction, Site identification

In geotechnical engineering, it's challenging to construct a site-specific multivariate probability distribution model for soil/rock properties because the site-specific data are usually sparse and incomplete. A hybridization method has been proposed to combine site-specific data and a generic database to produce a quasi-site-specific model. However, this method doesn't consider the possible intersite correlation.The Hierarchical Bayesian model (HBM), which considers inter-site and intra-site correlations, is proposed later. In this study, we consider the applicability of HBM to an ocean airport in Japan, by conducting spatial completion of geotechnical properties by using HBM and comparing the results with the actual data.