本文提出用应力路径法分析路堤的稳定性,能考虑路堤逐层筑高时地基土的固结和强度增长的因素。文中给出层状地基下变网格体系、交替方向隐式差分方程的表达式,供计算地基的固结度之用。它与常用的显式差分格式相比,具有绝对稳定、网格划分灵活、计算时间省、精度高等优点。文末附有实例分析。 This paper proposes to use the stress path method to analyze the stability of the embankment. It can consider the factors of consolidation and strength increase of the foundation soil when the embankment is built layer by layer. In this paper, the expressions of the variable-grid system and the alternating-direction implicit difference equations for layered soils are given to calculate the degree of consolidation of the foundation. Compared with the commonly used explicit difference format, it has the advantages of absolute stability, flexible mesh division, less computation time, and high precision. At the end of the article, there is an example analysis.