泉州岸带土层剪切波速和地面脉动的频谱特性

Shear wave velocity of soil layer and frequency spectrum property of gound pulse in Quanzhou coast area

本文根据泉州6种土层剪切波速和地面脉动观测资料,探讨有关参数与场地土层、场地土特性、场地类别等方面的关系。结果表明,本区6种不同土质剪切波速值随深度变化;各波速测孔附近地面脉动的峰值周期主要集中在0.18～0.56s间,其频谱特性可归为3类,各类与地层结构具有一定的对应关系。文中还讨论了利用地面脉动频谱特性研究土层平均剪切波速的可能性。

Based on the shear wave velocities of soil clayers and the ground pulse data that were observed by the author recently in Quanzhou coast area, this paper discusses the relationship among the soil layers, the charaters of the soils, the classification of the grounds and relative parameters, and gave out the statistical relationship of six different kinds of soil shear wave veloities whih vary with depth and the varying regularities of the values of the shear wave velocities in six kinds of typial soil layers. The observed results of the ground pulse near the holes for measuring the wave veloities showed that the periods of peak value of the ground pulse in the area were basically in the range of 0.18～0.56s. Their frequency spectrum properties can be classified into three categories, each having certain relationships with the ground structure. As for the relationship between the shear wave velocity of soil layer and the predominate period, this paper based on the analyses of the differences in the classification of the categories between the value of shear wave velocity and the predominate period of the ground, shows that they can be consistent in some ways, and discusses the possibility of studying the regularities of soil layer shear wave velocities varying with the depth by Using the properties of pulse frequency spectra.