铜川新区土层剪切波速与土层深度的统计关系研究  

STATISTICAL STUDY ON THE RELATIONSHIP BETWEEN SHEAR WAVE VELOCITY AND SOIL DEPTH IN LOESS AREA,TONGCHUAN

作　　者：段蕊[1] 王晓军[1] 袁志祥[1] 田伟新[1] 林卓[1] DUAN Rui;WANG Xiao-jun;YUAN Zhi-xiang;TIAN Wei-xin;LIN Zhuo(Shaanxi Earthquake Agency,Xi'an 710068,Shaanxi,China)

机构地区：[1]陕西省地震局

出　　处：《内陆地震》2019年第3期218-228,共11页Inland Earthquake

基　　金：陕西省防震减灾“十三五”重点项目——“铜川市地震小区划”(201607)

摘　　要：基于铜川市地震小区划项目中46个钻孔1 960个实测剪切波速样本数据,采用幂函数、指数函数、线性函数和一元三次多项式函数4种模型,对该地区典型土层剪切波速随深度的变化关系进行统计回归,并以拟合优度为评价标准,得到最优回归公式为一元三次多项式函数模型。与实测波速对比结果表明,本地区按区分岩性的最优回归公式分层得到的预测结果精度更高,所推荐的经验公式可供无波速资料的同类场地参考使用。Based on the sample data of the 46 holes and 1 960 measured shear wave velocity of Tongchuan Seismic Microzoning,this paper uses four models of power function,exponential function,linear function and univariate cubic polynomial function to make statistical regression of the shear wave velocity with depth in the area.The variation of shear wave velocity with depth is statistically regressed by distinguishing lithology from non-lithology,and the optimal regression formula is obtained by comparison analysis and discussion.The comparison results with the measured wave velocity show that the prediction results obtained by stratification of the optimal regression formula for distinguishing lithology in this area are more accurate.

关 键 词：剪切波速 土层深度 统计回归 拟合优度 黄土地区 

分 类 号：P315.7[天文地球—地震学]