黄土公路边坡稳定性数值模拟研究

以某高速公路边坡为工程背景，针对开挖后的高堑边坡，运用抗剪强度折减法，结合FLAC3D进行三维数值模拟分析，研究坡体变形破坏的演化规律。研究结果表明：土坡破坏前临界时刻发生最大应变增量处位于土坡最后发生剪切破坏的滑裂面上，且应变增量的等值线即为最危险滑裂面；剪切破坏带是沿实际滑裂面基本对称的带状区域，其应变增量由带状中心向两侧逐渐减小，而且剪切破坏带中心位置自坡脚处向上应变增量值逐渐减小，土体剪切破坏是从坡脚处向上逐渐发展并最终贯通为整个滑裂面。

Numerical Simulation Study on Stability of Loess Highway Slope

Based on the excavation of high cutting slope,shear strength reduction method is used to study the evolution of deformation and failure of a highway slope combining with FLAC3D three-dimensional numerical simulation.The results show that the maximum strain increment occurs in the slope of the last occurrence of shear failure slip surface before the damage critical moment of slope,and the strain increment contours should be the most dangerous slip surface;shear failure is the fundamental symmetric of the strip area along with the actual