Slope Stability Charts for Two-Layered Purely Cohesive Soils Based on Finite-Element Limit Analysis Methods

被引：62
作者：
Qian, Z. G. [1 ]
Li, A. J. [1 ]
Merifield, R. S. [2 ]
Lyamin, A. V. [3 ]
机构：
[1] Deakin Univ, Sch Engn, Geelong, Vic 3217, Australia
[2] SMEC Australia, Newcastle, NSW 2300, Australia
[3] Univ Newcastle, Ctr Geotech & Mat Modelling, Callaghan, NSW 2308, Australia
来源：
INTERNATIONAL JOURNAL OF GEOMECHANICS | 2015年 / 15卷 / 03期
关键词：
Limit-equilibrium methods (LEMs); Soil fill; Stability number; Factor of safety; Landslides; BROWN FAILURE CRITERION; 3-DIMENSIONAL ANALYSIS; LOADED SLOPES; EQUILIBRIUM; CLAY;
D O I：
10.1061/(ASCE)GM.1943-5622.0000438
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
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 slope material 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.
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页数：14
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