关键词: 寒区路堤, 非线性破坏准则, 极限分析, 寒区路堤, 非线性破坏准则, 极限分析

Abstract: In many practical problems,such as the frozen gravel or the frozen gravel-fill embankments,it has been illustrated that the frozen porous material obeys a highly non-linear failure criterion.Based on the upper bound theory of limit equilibrium analysis,a formula is obtained for the plastic work rate that takes place in a frozen embankment consisting of a perfectly plastic material obeying the non-linear failure criterion with an associative flow rule in the plane strain regime.The non-linear failure criterion is reduced to a linear one that is the tangent line of the former in the stress space in order to simplify the procedure of the stability analysis.The advantage of the presented method lies in its incorporation of the related non-linear effects and yielding results of high accuracy with simple calculation procedure.The analyses indicate that the results for the slope stability obtained by using the linear failure criterion in the existing literatures can be applied to the cases with the nonlinear failure criterions in engineering practice.

Key words: frozen embankment, nonlinear failure criterion, limit equilibrium analysis, frozen embankment, nonlinear failure criterion, limit equilibrium analysis