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_03-011-cd
Probabilistic Investigation of Infinite Undrained Slopes with Seismic Loading and Linearly Increasing Mean Strength
1Institute of Geotechnical Engineering, Yangzhou University, Yangzhou, P. R. China.
2Jiangsu Hongji Water Source Technology Co., Ltd., Yangzhou, P. R. China.
3Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO, USA.
4Department of Engineering Mathematics, Dalhousie University, Halifax, NS, Canada.
ABSTRACT
The infinite model is often used, for an initial assessment of the mechanics and stability of shallow landslides. Spatial variability is a dominant feature of natural soils, with a trend of increasing strength with depth. In this paper, an algorithm to generate 1D non-stationary random fields of undrained strength is proposed, and used to analyze the influence of spatially variable undrained strength on infinite slope reliability, with a linearly increasing mean trend. Both static and pseudo-seismic loading is considered. A critical slope angle leading to a minimum reliability index is identified, and shown to be related to the horizontal seismic coefficient.
Keywords: Infinite slope, Failure mechanism, Non-stationary random field, Spatial variability, Probability of failure.
