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土层剪切波速是土层动力特性和场地类别评判以及结构抗震所需要的重要参数。很多地区基于已有统计资料,取得了剪切波速与深度之间及标准贯入值之间的统计关系。但标准贯入值、钻孔深度对剪切波速估值的具体影响程度和主次关系如何仍未知。该文尝试引入系统的理论方法—灰色关联分析方法分析钻孔深度、标准贯入值对剪切波速影响的主次关系,得出土层标贯击数与相应土层剪切波速之间具有很好的关联性,而土层深度对剪切波速影响的关联度一般,应该用土层标贯数据进行剪切波速估值公式拟合的结论。
Soil shear wave velocity is an important parameter needed to evaluate the dynamic characteristics of soil and site classification as well as the seismic resistance of structures. In many areas, based on the available statistics, the statistical relationship between shear wave velocity and depth and standard penetration is obtained. However, it is still not clear how the standard penetrant value and the depth of drilling influence the shear wave velocity estimation. This paper attempts to introduce the theory of the system - the gray relational analysis method to analyze the primary and secondary relationship between the drilling depth and the standard penetrant value on the shear wave velocity. It is found that there is a great relationship between the standard penetration number and the corresponding shear wave velocity Good correlation, and the depth of the soil depth shear wave velocity correlation is normal, the conclusion should be drawn by using the shear wave velocity estimation formula of soil standard data.