28 / 2021-10-28 21:39:21

Coupled characterization of stratigraphic and geo-properties uncertainties - A conditional random field approach

Site characterization; Conditional random field; Stratigraphic uncertainty; Geo-properties uncertainty; Soil liquefaction

Site characterization, which aims to characterize the subsurface stratigraphic configuration and the associated geo-properties, has long been a significant challenge in geological and geotechnical practice. Due to the complexity and inherent spatial variability of the geological bodies and the limited availability of borehole data, uncertainty could be significant in the characterized stratigraphic configuration and the associated geo-properties. In previous studies, the stratigraphic uncertainty and the geo-properties uncertainty were characterized separately. This poster presents a conditional random field approach for the coupled characterization of the stratigraphic and geo-properties uncertainties, through which the inherent spatial variability of stratigraphic configuration and that of geo-properties are considered simultaneously in probabilistic site characterization. The effectiveness of this approach is demonstrated through a case study of probabilistic site characterization of an offshore wind farm site in Taiwan. To extend the applicability of the presented approach, a probabilistic evaluation of liquefaction potential at this site and a probabilistic stability analysis of Majiagou Landslide are performed.