采用FLAC程序和黄金分割轮换变量法进行反分析优化计算,一方面发挥了FLAC程序适应性广的特点;另一方面,采用坐标黄金分割法对反分析计算过程进行优化,显著提高反分析的效率。针对宜巴高速公路平邑口隧道施工,由监控量测位移数据进行了岩体力学参数的弹塑性反分析,由实测的位移反分析计算得到围岩力学参数,如弹性模量E和粘聚力c。同时,进一步由得到的围岩力学参数采用FLAC计算开挖面前方的变形值。研究表明,本文采用的反分析计算方法是行之有效的,可以应用于隧道工程施工实际。 On the one hand, the FLAC program and the golden section rotation variable method are used to optimize the back analysis. On the one hand, the FLAC program has the characteristics of wide adaptability. On the other hand, the coordinate golden section method is used to optimize the back analysis and calculation process, . According to the construction of Pingyikou tunnel on Yiba expressway, the elasto-plastic inverse analysis of mechanical parameters of rock mass is carried out by monitoring the measured displacement data. The mechanical parameters of surrounding rock are calculated by the measured displacement back analysis, such as elastic modulus E and cohesion Force c. At the same time, FLAC is further used to calculate the deformation value in front of the excavation face from the mechanical parameters of the surrounding rock. The research shows that the inverse analysis method used in this paper is effective and can be applied to the actual construction of tunneling projects.