K0应力状态下渗流潜蚀试验与数值研究

Translated title of the contribution: Experimental and numerical study of seepage-induced suffusion under K 0 stress state

Tuo Wang, Feng shou Zhang, Pei Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Suffusion in gap-graded soil involves selective erosion of fine particles through the pores formed by coarse particles under seepage forces. As the fines content (FC) decreases, the hydraulic and mechanical behavior of the soil will change, posing a huge threat to engineering safety. In this study, we first conduct a series of experimental tests of suffusion by using gap-graded soils and then analyze the evolution process of suffusion and the effect of the hydraulic gradient. Subsequently, according to the physical model, a discrete element method (DEM) numerical model with dynamic fluid mesh (DFM) is developed to extend the experimental study to the pore scale. Our results reveal the migration process of fines and the formation of erosion zones. A parametric study is then conducted to investigate the effect of the hydraulic gradient, FC, and K0 pressure (which limits the lateral displacement of the sample and applies vertical pressure) on eroded weight. The results show that the eroded weight increases with the increase of the hydraulic gradient and FC but decreases with the increase of K0 pressure.

Translated title of the contributionExperimental and numerical study of seepage-induced suffusion under K 0 stress state
Original languageChinese (Simplified)
Pages (from-to)319-331
Number of pages13
JournalJournal of Zhejiang University: Science A
Volume24
Issue number4
DOIs
Publication statusPublished - Apr 2023

Keywords

  • Discrete element method (DEM)
  • Dynamic fluid mesh (DFM)
  • Gap-graded soil
  • Suffusion

ASJC Scopus subject areas

  • General Engineering

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