Drained shear strength parameters for analysis of landslides

Timothy D. Stark, Hangseok Choi, Sean McCone

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

This paper presents recommendations for selecting the type and magnitude of drained shear strength parameters for analysis of landslides. In particular, the importance, existence, and use of the cohesion shear strength parameter is reviewed. For slope stability analyses, it is recommended that the shear strength be modeled using a stress dependent failure envelope or a friction angle that corresponds to the average effective normal stress acting on the slip surface passing through that particular material instead of using a combination of cohesion and friction angle to represent soil shear strength. Other recommendations for stability analyses include using an effective stress cohesion of zero for residual and fully softened strength situations. To facilitate selection of shear strength parameters for landslide analyses, empirical relationships for the drained residual and fully softened strengths are updated from the previous empirical relationships presented by Stark and Eid. Finally, the paper presents torsional ring shear test results that indicate that pre-existing shear surfaces exhibit self-healing that results in increased shear resistance. The magnitude of healing appears to increase with increasing soil plasticity, and this increase could have implications for the size, timing, and cost of landslide remediation. Journal of Geotechnical and Geoenvironmental Engineering

Original languageEnglish
Pages (from-to)575-588
Number of pages14
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume131
Issue number5
DOIs
Publication statusPublished - 2005 May 1
Externally publishedYes

Fingerprint

Landslides
Shear strength
shear strength
landslide
cohesion
friction
Friction
Soils
Slope stability
shear test
effective stress
slope stability
Remediation
Plasticity
plasticity
remediation
soil
analysis
parameter
engineering

Keywords

  • Landslides
  • Overconsolidated clays
  • Remedial action
  • Shear strength
  • Slope stability
  • Soil mechanics

ASJC Scopus subject areas

  • Environmental Science(all)
  • Geotechnical Engineering and Engineering Geology

Cite this

Drained shear strength parameters for analysis of landslides. / Stark, Timothy D.; Choi, Hangseok; McCone, Sean.

In: Journal of Geotechnical and Geoenvironmental Engineering, Vol. 131, No. 5, 01.05.2005, p. 575-588.

Research output: Contribution to journalArticle

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