雄安新区剪切波速剖面VS30估算模型研究

本文基于雄安新区起步区区域性地震安全性评价工程435个钻孔剖面数据，选取其中300个钻孔剖面进行回归分析，利用剩余的135个钻孔剖面数据进行模型可靠性检验。研究结果表明，当钻孔剖面深度小于15 m时，Boore等模型明显低估了V_S30；当深度小于10 m时，本研究中对数线性模型、对数二次模型、对数三次模型存在约3%的低估现象；对数三次模型相对误差、残差标准差均较小，因此，对数三次模型更适用于估算雄安新区缺乏钻孔资料或钻孔剖面深度未达30 m的 V_S30。

Research on Shear-wave Velocity Profile VS30 Estimation Model in Xiong'an New District

In this paper, based on the data of 435 borehole profiles of the regional seismic safety evaluation project in the start-up area of Xiong’an New Area, 300 of the borehole profiles were selected for regression analysis, and the remaining 135 borehole profiles were used for model reliability testing. The results show that the Boore et al. model significantly underestimates V_S30 when the borehole profile depth is less than 15 m; When the depth is less than 10 m, the log-linear model, log-quadratic model, and log-three model in this study have about 3% underestimation; the relative errors and standard deviations of residuals of the log-three model are smaller, therefore, the log-three model is more suitable for estimating V_S30 in Xiong’an New Area where there is no borehole information or the depth of the borehole profile does not reach 30 m.