A non-Darcy flow CFD–DEM method for simulating ground collapse induced by leakage through underground pipeline defect

X Li, R Chen, L Liu, C Zhou, B Bate - Computers and Geotechnics, 2023 - Elsevier
Ground collapse due to soil erosion near pipeline defects involves soil loss and orifice
outflow, which may lead to non-Darcy flow, but it is often ignored in numerical simulations. In …

CFD-DEM simulation of sand erosion into defective gravity pipes under constant groundwater table

A Ibrahim, MA Meguid - Tunnelling and Underground Space Technology, 2023 - Elsevier
As sewer pipes age, cracks and other forms of structural damage may develop leading to
soil infiltration into the pipes that can cause sinkholes and damage the overlying roads and …

A coupled discrete element model for the simulation of soil and water flow through an orifice

Y Tang, DH Chan, DZ Zhu - International Journal for Numerical …, 2017 - Wiley Online Library
Soil erosion around defective underground pipes can cause ground collapses and
sinkholes in urban areas. Most of these soil erosion events are caused by fluidization of the …

Study on drilling ground collapse induced by groundwater flow and prevention based on a coupled CFD-DEM method

H Zhou, C Liu, G Wang, K Kang, Y Liu - KSCE Journal of Civil Engineering, 2022 - Springer
Given the hazards caused by drilling ground collapse (DGC) due to groundwater flow in the
processes of geotechnical engineering investigation, a coupled computational fluid …

Numerical simulation on the longitudinal breach process of landslide dams using an improved coupled DEM-CFD method

D Li, D Zheng, H Wu, Y Shen, T Nian - Frontiers in Earth Science, 2021 - frontiersin.org
An accurate investigation of the landslide dam breach process is crucial for the
understanding the breach mechanism and disaster prediction. However, the numerical …

Simulating the collapse of unsaturated soil by DEM

SH Liu, DA Sun - … journal for numerical and analytical methods …, 2002 - Wiley Online Library
This paper presents a numerical method to simulate the collapse behaviours of unsaturated
soils by distinct element method (DEM). The influence of suction in unsaturated soil is …

Experimental and numerical investigation on the mechanism of ground collapse induced by underground drainage pipe leakage

Z Dai, L Peng, S Qin - Environmental Earth Sciences, 2024 - Springer
Ground collapse is a common urban geological disaster mainly triggered by the leakage of
underground drainage pipe. To reproduce the process of underground cavity formation and …

Quantitative analysis of piping erosion micro-mechanisms with coupled CFD and DEM method

H Tao, J Tao - Acta Geotechnica, 2017 - Springer
Piping, as one of the critical patterns of internal erosion, has been reported as a major cause
for failures of embankment dams and levees. The fundamental mechanism of piping was …

[HTML][HTML] Numerical simulation for runout process of debris flow using depth-averaged material point method

K Abe, K Konagai - Soils and Foundations, 2016 - Elsevier
Debris flows, ie, combined flows of watery mud, chunks of boulders, trees, etc., can be
extremely destructive to life and property and can exhibit complicated mechanical features …

Experimental and numerical study of internal erosion around submerged defective pipe

DM Zhang, WW Du, MZ Peng, SJ Feng, ZL Li - … and Underground Space …, 2020 - Elsevier
Ground subsidence induced by internal erosion around defective sewer pipes commonly
occurs in urban areas of many cities over the world, which has caused substantial …