Influence of Both Soil Properties and Geometric Parameters on Failure Mechanisms and Stability of Two-Layer Undrained Slopes. (27th June 2020)

• Record Type: Journal Article
• Authors: Guo, Shuangfeng; Li, Ning; Liu, Wenpeng; Ma, Zongyuan; Liu, Naifei; Lv, Gao
• Other Names: Boccaccio Antonio Academic Editor.
• Is Part Of: Advances in materials science and engineering. Volume 2020(2020)
• Publication Date: 2020-06-27
• Subjects: Materials science -- Periodicals; Materials science; Periodicals; 620.11
• DOI: 10.1155/2020/4253026
• Languages: English
• ISSNs: 1687-8434

Abstract

Abstract : The stability of the two-layer undrained clay slopes should be given considerable attention since they are commonly observed in nature and in manmade structures, and they traditionally have low stability. Therefore, with the elastoplastic finite element method, this paper thoroughly explores the influence of the soil strength parameter c u, slope angle β, and slope depth ratio DH on the slope stability and failure mechanisms by the wide-ranging parametric changes. The aims of this study are also to find the critical strength ratio ( c u 2 /c u 1 ) crit and the maximum values of the stability number N c that were observed in the parametric studies. Numerical results are displayed in the form of charts to give N c and ( c u 2 /c u 1 ) crit as a function of c u, β, and DH . Moreover, influences of DH and β on N c and failure mechanisms are examined in this study. The results of numerical analysis demonstrate that c u 2 /c u 1 significantly affects both the critical failure mechanism and the stability of the two-layer undrained slope. Improved knowledge of the location of the critical failure mechanism allows for accurately estimating the stability of the two-layer undrained slopes for future strengthening measurements to preserve stability.