Proceedings of the
8th International Symposium on Geotechnical Safety and Risk (ISGSR)
14 – 16 December 2022, Newcastle, Australia
Editors: Jinsong Huang, D.V. Griffiths, Shui-Hua Jiang, Anna Giacomini, Richard Kelly
doi:10.3850/978-981-18-5182-7_20-009-cd
Three-Dimensional Marine Geological Modeling for Land Reclamation
1The Hong Kong University of Science and Technology, Hong Kong SAR, China.
2The Hong Kong University of Science and Technology, Hong Kong SAR, China; HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian, Shenzhen, China.
3AECOM Asian Company Limited, Hong Kong SAR, China.
ABSTRACT
Understanding marine geological conditions is a primary task for land reclamation, and a three-dimensional (3-D) marine geological model is a straightforward and visualized tool for this purpose. Considering the different advantages of boreholes and geophysical surveys in terms of accuracy and scale, this study proposes a Bayesian framework to integrate the information from both boreholes and geophysical surveys to develop a more reliable 3-D marine geological model. Machine learning is applied to facilitate the prediction of geological units at unknown locations from existing boreholes. A 3-D marine geological model for the East Lantau Metropolis, Hong Kong, is created. Both geological layers of alluvium and marine deposits are thicker than 18 m, and the bedrock surface is more than 50 m below the sea level. The 3-D marine geological model can facilitate the land reclamation design in this area.
Keywords: Land reclamation, geological modeling, marine borehole, Bayesian approach, machine learning.
