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_03-001-cd
Analysis of Multiple Failure Modes for Pile-Reinforced Slope with Soil Spatial Variability
1Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, School of Geosciences and Info-Physics, Central South University, Changsha 410083, P. R. China
2Laboratory 3SR, Grenoble Alpes University, CNRS UMR 5521, Grenoble, France
ABSTRACT
Stabilizing piles have been widely used in slope reinforcement against landslides. Previous investigations on the stability analyses of slope stabilized with flexible piles, however, were mainly based on the deterministic methods, where the uncertainty inherent in soil properties and the pile response were rarely incorporated. This paper proposed a new integrated framework for probabilistic analysis of pile-reinforced slopes considering the interaction between piles and soils. The soilpile interaction is modelled by the strain wedge (SW) model, and the soil spatial variability is simulated by one-dimensional random field theory. In particular, the effect of soil spatial variability on piles response and the slope failure modes are studied. Illustrative examples with parametric studies show that soil spatial variability has significant influences on the failure mode of slope and soil-pile response. The integrated framework provides an efficient solution for probabilistic analysis of pile-reinforced slope system.
Keywords: Stabilizing pile, Spatial variability, Strain wedge model, Soil-pile interaction, Slope stability.
