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Slope stability charts for two-layered purely cohesive soils based on finite-element limit analysis methods

Version 2 2024-06-05, 05:04
Version 1 2015-08-12, 12:59
journal contribution
posted on 2024-06-05, 05:04 authored by ZG Qian, AJ Li, RS Merifield, AV Lyamin
Stability charts for soil slopes, first produced in the first half of the twentieth century, continue to be used extensively as design tools, and draw the attention of many investigators. This paper uses finite-element upper and lower bound limit analysis to assess the short-term stability of slopes in which the slopematerial and subgrade foundation material have two distinctly different undrained strengths. The stability charts are proposed, and the exact theoretical solutions are bracketed to within 4.2% or better. In addition, results from the limit-equilibrium method (LEM) have been used for comparison. Differences of up to 20% were found between the numerical limit analysis and LEM solutions. It also shown that the LEM sometimes leads to errors, although it is widely used in practice for slope stability assessments.

History

Journal

International journal of geomechanics

Volume

15

Pagination

1-14

Location

Reston, Va.

ISSN

1532-3641

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2015, American Society of Civil Engineers

Issue

3

Publisher

American Society of Civil Engineers (ASCE)