高速公路隧道施工监控拱顶变形特性

Analysis on monitoring vault deformation characteristics in highway tunnel construction

对湖南某高速公路某隧道Ⅴ级围岩施工监控量测拱顶下沉数据的统计分析,发现基本稳定后的拱顶下沉数据符合对数正态分布。通过对数据的计算,推导出其对数正态分布的密度函数公式,计算出下沉特征值的概率,了解了整体岩体的周边位移变化特性,对隧道预留变形设计修正提供参考。

By the statistical analysis of certain expressway certain tunnel V level surrounding rock construction monitoring measurement vault settlement data in Hunan province,it was found that the basic stable vault settlement data accord with logarithmic normal distribution.By calculation of data,which can derive the density function formula with logarithmic normal distribution,calculate the probability of settlement eigenvalue,investigate the peripheral displacement change characteristic of whole rock,and provide reference of design correction of tunnel reservation deformation.