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深埋特长公路隧道三维初始应力场的回归分析

, PP. 112-117

Keywords: 隧道工程,深埋特长隧道,有限元,回归分析,初始应力场

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Abstract:

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。

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