Journal
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
Volume 78, Issue 8, Pages 5727-5743Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10064-019-01513-2
Keywords
Random field; Probabilistic analysis; Permeability; Soil-water characteristic curve (SWCC); Shear strength; Rainfall infiltration
Funding
- Thailand Research Fund [DBG-6180004]
- Ratchadapisek Sompoch Endowment Fund (2019), Chulalongkorn University [762003-CC]
- Royal Society-Newton Advanced Fellowship [NA170293]
- Ratchadapisek Sompote Fund (2019) for Postdoctoral Fellowship, Chulalongkorn University
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In general, soil properties, including shear strength and hydraulic parameters, are characterised as a spatial variability. This paper aims to investigate the effect of spatial variability of the soil properties on slope stability during rainfall infiltration. The effective friction angle, saturated hydraulic conductivity, and soil water characteristic curve parameters of sand are simulated using random field theory. A seepage analysis is conducted using the random finite element method to obtain pore water pressure distribution. A stability analysis is performed to show the variation of safety factors and failure probability. The results show that the random field of the soil-water characteristic curve produces a significant variation of pore water pressure, while the random field of the effective friction angle is the most important parameter for probabilistic stability analysis.
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