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结合苍岭隧道现场的工程地质条件及实测地应力资料,在分析工程区初始应力场各影响因素的基础上,采用有限元数值模拟对建立的隧道三维地质概化模型在各影响因素单独作用下进行分析计算;并在实测点地应力值与计算得到的应力值之间建立多元回归模型。通过多元回归分析,建立最优的回归方程,从而获得整个工程区初始地应力场较为合理的分布规律。利用上述方法获得了苍岭隧道初始应力场分布的回归方程,并通过实测点的计算应力值与现场实测值的比较可知,回归得到的初始应力场是合理的,为苍岭隧道的设计、施工提供了重要的基础性资料。
Based on the engineering geological conditions and the measured geostress data of Cangling tunnel site, based on the analysis of various influencing factors of the initial stress field in the project area, the three-dimensional geological generalized tunnel model established by finite element numerical simulation was used under the influence of each factor alone Analysis and calculation; and in the measured point stress and calculated stress value between the establishment of multiple regression model. Through multiple regression analysis, the optimal regression equation is established to obtain a more reasonable distribution law of the initial geostress field in the entire project area. By using the above method, the regression equation of the initial stress field distribution of CangLing tunnel was obtained. The comparison of the measured stress values with the observed ones shows that the initial stress field obtained by regression is reasonable. The design and construction of CangLing tunnel Provide important basic information.