华南地震2024，Vol.44Issue(1)：52-62,11.DOI:10.13512/j.hndz.2024.01.06
天津市平原地区土层剪切波速与埋深间的关系
Relationship between Shear Wave Velocity and Buried Depth in Tianjin Plain Area
摘要
Abstract
Tianjin is located in the Bohai bay area,and its soil layer is dominated by fine particles,which is prone to seismic and geological problems of foundation failure and uneven settlement.The relationship between shear wave velocity and soil depth is qualitatively analyzed by using the data of borehole shear wave velocity accumulated in Tianjin plain area.The clay,silt and medium fine sand in different sedimentary regions of Tianjin plain area was statistically regressed by using different function fitting models.The regressive statistical analyses show that there is a significant positive correlation between the shear wave velocity and buried depth in Tianjin and the quadratic polynomial function fitting model is more suitable for the prediction of shear wave velocity in this region.The correlation between the sedimentary characteristics of Quaternary strata and shear wave velocity in Tianjin plain area is obvious,which significantly affects the fitting accuracy of the prediction models.After the reliability test,the results show that the average relative errors of the prediction results which used the fitting model with different soil classification and the fitting model without classification is less than 10%.Furthermore,in the case of unknown soil types,using the fitting model without classification to predict shear wave velocity can obtain reasonable reliability results.关键词
剪切波速/土层埋深/拟合公式/统计回归Key words
Shear wave velocity/Soil depth/Fitting formula/Statistical regression分类
建筑与水利引用本文复制引用
易文星,李安,雷生学,郭长辉,原浩东..天津市平原地区土层剪切波速与埋深间的关系[J].华南地震,2024,44(1):52-62,11.基金项目
地震动力学国家重点实验室自主研究课题(LE2022A01) （LE2022A01）
国家重点研发计划课题(2018YFC1504202)联合资助. （2018YFC1504202）
