基于现场监测和数值模拟的公路边坡开挖方案研究

通过对广乐高速公路工程K102高边坡长期监测,利用现场监测数据修正ABAQUS计算模型,反算力学参数,依据此力学参数对边坡进行了不同开挖方案的数值模拟,研究了该边坡的最优开挖方案。研究结果表明:原现场开挖方案中的坡率不合理,不能控制边坡施工期间的变形和整体稳定性;放缓坡率开挖能有效地提高K102边坡整体稳定性,与原开挖方案相比,既安全又经济。

Study on Excavation Scheme of Highway Slope Based on Field Monitoring and Numerical Modeling

Through long-time monitoring to the high slope along K102 section of Guangzhou-Lechang Highway, this paper corrected the ABAQUS calculation model with the data from field monitoring to back calculate the mechanical parameters, and then modelled the different excavation schemes numerically on this basis; thus explored the optimal excavation scheme for this slope. The study result shows that, the gradient in the original excavation scheme is so unreasonable as to the slope deformation and stability not to be controlled in the construction; moderate sloping in excavation may improve the stability of K102 slope and, compared to the original excavation scheme, it is a safe and economic method.