山西大同市区剪切波速与土层岩性及深度关系的研究

Study on the Relationship Between Shear Wave Velocity and Soil Lithology and Depth in Datong City

在对山西大同市区3个主要地貌单元共72个钻孔的剪切波速资料分析整理的基础上,利用指数形式的剪切波速与深度经验公式,对测点较多的粉质黏土、粉土、粗砂三类土层的剪切波速Vs与土层深度H的关系进行统计回归,并将实测剪切波速值与利用上述统计结果得到的预测值进行对比检验,结果表明,分地貌单元各类土层的Vs-H经验关系是可靠的,符合当地岩土特征,可用于对该地区地层剪切波速进行推测。

Based on the analysis of the shear-wave velocity data from 72 bores distributing in 3 main geomorphology units of Datong city and using the experience formula in exponential form of shear-wave velocity and depth, the statistical regression of the relationship between shear wave velocity and soil depth of three different types of soil, silty clay, powder clay and coarse sand is carried out. In addition, the comparison test between measured shear wave values and prediction values from above statistic results has also been done. The results indicate that the Vs-H experience relationship of each geomorphology unit is reliable, according with the soil characteristics and can be used to conjecture the soil shear wave velocity of this area.