Undrained stability of an active planar trapdoor in non-homogeneous clays with a linear increase of strength with depth
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- 作者：Suraparb Keawsawasvong ; M.Eng. ; Ph.D. suraparb@hotmail.com" class="auth_mail" title="E-mail the corresponding author (Research Fellow) ; Boonchai Ukritchon ; Sc.D. ; boonchai.uk@gmail.com" class="auth_mail" title="E-mail the corresponding author (Associate Professor)
- 关键词：Limit analysis ; Numerical analysis ; Stability ; Trapdoor ; Active failure
- 刊名：Computers and Geotechnics
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：81
- 期：Complete
- 页码：284-293
- 全文大小：3054 K
文摘
Finite element limit analysis was employed to determine the upper and lower bound solutions of the active failure of a planar trapdoor in non-homogeneous clays that have a linear increase of strength with depth. Influences of cover ratio, dimensionless strength gradient and trapdoor roughness on predicted failure mechanisms and stability factors were determined. In all cases, the exact stability factors were accurately bracketed by computed bound solutions within 1%. Accurate closed-form equations to predict the exact estimates of stability factors, trapdoor pressure and factor of safety using the new proposed factors for the cohesion and strength gradient are presented.