Journal Publications

DOI number:10.1016/j.compgeo.2026.108371

Journal:Computers and Geotechnics

Key Words:Granular landslide; Nonlocal effect; Basal sliding; μ(I) model; SPH

Abstract:Continuum-based theories are widely used to analyze earth surface granular flows, yet their reliance on local constitutive laws and no-slip boundary conditions fundamentally limits the representation of phenomena arising from granular discreteness, particularly nonlocal effects (e.g., quasi-static creep, internal shear structures, and critical thickness) and basal sliding. To address these limitations, a novel 3D-SPH numerical model is developed upon our previous research by enhancing both the rheological description and boundary treatment. A gradient-extended μ(I) rheology is incorporated to capture the spatial diffusion of granular fluidity and is validated through a series of flume and granular-collapse experiments. Furthermore, a normalization and boundary-flux compensation strategy is introduced to correct support-domain truncation errors in conventional single-layer SPH boundaries, upon which a concise basal sliding condition governed by a dimensionless sliding coefficient ε is constructed. Based on experimental data, the controlling factors of ε are systematically identified and a quantitative determination scheme is established. Finally, the novel 3D-SPH model integrating the nonlocal constitutive formulation and the basal-sliding boundary treatment, is applied to the back-analysis of the 2016 Aso landslide in Japan. Results demonstrate improved accuracy in capturing granular nonlocal effects and basal sliding, and exhibits high consistency with observations in terms of the evolution of granular flow dynamics and deposition morphology.

Note:中科院一区、TOP期刊

Co-author:(中科院一区、TOP期刊) Han Zheng, Huang, Jiayong, Su Bin (Corresponding author), Xie Wendu, Ma Yangfan, Li Changli, Li Yange, Chen Guangqi

Indexed by:Journal paper

Document Code:108371

Issue:199

Page Number:108371

Translation or Not:no

Date of Publication:2026-06-20

Included Journals:SCI