Impact force of granular flows on walls normal to the bottom: slow versus fast impact dynamics

T Faug - Canadian Geotechnical Journal, 2021 - cdnsciencepub.com
The devastating effects of natural hazards due to the propagation of mass flows, such as
landslides, debris flows, and avalanches, can be avoided, or at least reduced, by placing …

Influence of particle size on the mechanism of dry granular run-up on a rigid barrier

CWW Ng, CE Choi, LHD Liu, Y Wang… - Géotechnique …, 2017 - icevirtuallibrary.com
Granular flows comprise a wide range of particle sizes. The particle size governs the degree
of grain contact and inertial stresses in the flow, thus influencing the mechanism of impact …

Experimental validation of a new semi-empirical impact force model of the dry granular flow impact against a rigid barrier

YJ Jiang, XY Fan, LJ Su, S Xiao, J Sui, RX Zhang… - Landslides, 2021 - Springer
The maximum impact force of granular flow and its action point on a rigid barrier are the key
indices of the anti-slip and the anti-overturning calculation, respectively. On the basis of the …

Slit structures: Fundamental mechanisms of mechanical trapping of granular flows

SR Goodwin, CE Choi - Computers and Geotechnics, 2020 - Elsevier
Slit-structures are rigid structures with one or more slits. To retard steep-creek hazards, slit-
structures are sometimes installed to reduce the peak discharge, as well as to mechanically …

Effects of solid fraction of saturated granular flows on overflow and landing mechanisms of rigid barriers

CWW Ng, U Majeed, CE Choi - Géotechnique, 2022 - icevirtuallibrary.com
Steep creek hazards are characterised according to their solid fraction, ν s, which governs
the flow dynamics. To arrest these hazards, rigid multiple barriers are installed along a …

Unsteady overflow behavior of polydisperse granular flows against closed type barrier

B Zhang, Y Huang - Engineering Geology, 2021 - Elsevier
The overflow behavior of polydisperse granular flows against closed type barrier is a crucial
yet poorly understood aspect of multiple-barrier design. We use a robust numerical model …

Effects of debris flow rheology on overflow and impact dynamics against dual-rigid barriers

CWW Ng, A Bhatta, CE Choi, S Poudyal, H Liu… - …, 2022 - icevirtuallibrary.com
It is well recognised that the rheology of an interstitial fluid has profound effects on debris
flow dynamics. Existing design guidelines for multiple resisting barriers, however, do not …

Experimental investigation of dry granular flows down an inclined channel against a wall-like obstacle of limited width

Y Wu, D Wang, P Li, Z Niu - Acta Geotechnica, 2023 - Springer
The granular flow down an inclined channel impacting a wall-like obstacle of limited width is
experimentally investigated, and the influences of incoming flow characteristics as well as …

Quantitative 3D simulation analysis of debris flow impact effect based on SPH

X Song, X Zhang, S Wu - Computational Particle Mechanics, 2024 - Springer
The debris flow is a multiphase mixture. The traditional numerical model based on Bingham
and Herschel–Bulkley–Papanastasiou (HBP) constitutive relations cannot simultaneously …

A combined method for modeling the triggering and propagation of debris flows

M Hong, S Jeong, J Kim - Landslides, 2020 - Springer
This study describes a combined method for rainfall-induced debris flow initiations
(landslides) and propagations including a series of numerical analyses. In this study, the …