广西某高速公路边坡开挖稳定性评价及加固效果分析

以广西某高速公路边坡的开挖加固工程为例，基于快速拉格朗日元法FLAC3D数值模拟分析，评价了该边坡在开挖支护过程中的稳定性。结果表明:在开挖到第三步时，坡体最大不平衡力不收敛，需对边坡进行加固设计。在施加锚索支护后，坡体的水平位移和最大剪应力区域均保持在工程要求的范围内，边坡的整体稳定性得到提高，可以保障开挖工程和高速公路路基施工的安全。

Assessment on Stability of Slope Excavation and Analysis on Reinforcement Effect for an Expressway in Guangxi Province

Taking the excavation and reinforcement project of a highway slope in Guangxi as an example, the stability of the slope in the excavation and support process was evaluated based on the FLAC3D numerical simulation of the fast Lagrangian element method. The results show that convergence of the maximum unbalanced force cannot be achieved when the 3rd step of excavation is performed. Reinforcement measures on the slope should be applied for the safety of expressway construction. After applying anchor cable support, the horizontal displacement and the maximum shear stress area of the slope remain within the range required by the project and the overall stability of the slope is improved, which can guarantee the safety of the excavation project and the roadbed construction of the expressway.