以渝湘高速公路共和隧道工程为例,采用以遍布节理模型模拟层状围岩进行数值模拟,得出不同开挖方法对围岩塑性区大小的影响。采用地质雷达进行了松动圈现场实测,实测结果和数值分析结果吻合较好。对比数值分析结果和实测结果,得出地质偏压隧道围岩破坏规律。 Taking the Gonghe tunnel project of Yuxiang Expressway as an example, the numerical simulation of the layered surrounding rock with the joint model is carried out, and the influence of different excavation methods on the plastic zone size of the surrounding rock is obtained. Geological radar was used to measure the field of loosening circle. The measured results agree well with the numerical results. Comparing the numerical analysis results with the measured results, the failure rules of the surrounding rock of the geo-bias tunnel are obtained.