中云台山超高岩质路堑边坡设计和稳定性分析

Design and Stability Analysis of the Super High Rock Cutting Slope on Zhongyuntai Mountain

连云港东疏港高速公路中云台山路堑段最高岩质边坡高194 m,是目前国内高速公路最高的岩质边坡之一。采取工程类比法、赤平极射投影图解法、极限平衡法、楔体滑动分析法、有限元法等多种计算方法对中云台山路堑边坡稳定性进行计算分析,综合评价边坡的整体稳定性和楔体稳定性。根据边坡整体和局部稳定计算结果,设计了多层次防护方案。在施工过程中对边坡进行全方位安全监测,根据监测结果和现场开挖所揭示的地质信息进行动态设计,保证了超高岩质边坡的稳定性。通车运行6年多来,边坡稳定性良好。

Zhongyuntai Mountain cutting slope of Lianyungang Dongshugang highway is one of the highest rock slopes in china with a height of almost 194 meter.The engineering analogy method,stereographic projection method,limit equilibrium method,wedge sliding analysis method,finite element method and other methods of analysis were used to calculate the overall and local stability of the slope.According to the computing results,multi-level protection methods were designed.The super high rock cutting slope was monitored in all dimensions and dynamic design method was applied according to the monitoring results and geological information revealed by excavation process during the construction process to ensure the stability of the super high rock slope.The highway was opened to traffic for over six years and the stability of the slope was good up to the present.