Stability analyses of dual porosity soil slope

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Many geotechnical analyses require the investigation of water flow within partially saturated soil zone to incorporate the effect of climatic conditions. It is widely understood that the hydraulic properties of the partially saturated soil should be included in the transient seepage analyses. However, the characteristics of dual porosity soils with dual-mode water retention curve are normally modelled using single-mode mathematical equation for simplification of the analysis. In reality, the rainwater flow can be affected significantly by the dual-mode hydraulic properties of the soil. This paper presents the variations of safety factor for dual porosity soil slope with dual-mode water retention curve and dual-mode unsaturated permeability. This paper includes the development of the new dual-mode unsaturated permeability to represent the characteristics of soil with the dual-mode water retention curve. The finite element analyses were conducted to examine the role of dual-mode water retention curve and dual-mode unsaturated permeability on the variations of safety factor under rainfall loading. The results indicate that the safety factor variations of dual porosity soil slope modelled using the dual-mode water retention curve and the unsaturated permeability equation are lower than those of dual porosity slope modelled using single-mode water retention curve and unsaturated permeability equations.

Original languageEnglish
Pages (from-to)77-87
Number of pages11
JournalGeomechanics and Engineering
Volume28
Issue number1
DOIs
Publication statusPublished - Jan 10 2022

Keywords

  • Numerical analyses
  • Partially saturated soil
  • Safety factor
  • Seepage
  • Slope stability

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

Fingerprint

Dive into the research topics of 'Stability analyses of dual porosity soil slope'. Together they form a unique fingerprint.

Cite this