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  李敏,杨立国,陈海鹏,盛特奇.杭州市典型土层剪切波速与埋深间的关系分析[J].震灾防御技术,2020,15(1):77-88, DOI:10.11899/zzfy20200108.

杭州市典型土层剪切波速与埋深间的关系分析
摘要:    基于杭州市丰富的场地钻孔剪切波速资料,采用3种常见的剪切波速与埋深回归分析模型,分析杭州地区5类常规土在场地分类和场地未分类情况下的最优拟合公式和预测范围,并对推荐模型进行可靠性验证,对常规粉质粘土和粉砂进行地区差异性分析。研究结果表明:本文推荐的剪切波速与埋深关系公式具有良好的可靠性;地区、岩土类型和预测深度均对剪切波速与埋深关系模型的可靠性产生显著影响,故应用时应优先选用本地区统计模型,如若未有,则需根据已有资料,对选用模型进行岩土类型和适应预测深度范围验证,以保证所选模型的可靠性;受地区、岩土类型和预测深度的影响,考虑场地分类并不一定提高统计模型的预测精度,在实际工程应用中具有不确定性。
作者单位
李敏 浙江省地震局, 杭州 310013 
杨立国 浙江省建筑设计研究院, 杭州 310006 
陈海鹏 浙江省地震局, 杭州 310013 
盛特奇 浙江省地震局, 杭州 310013 
关  键  词:剪切波速  埋深  场地类别  回归分析
DOI:10.11899/zzfy20200108
基金项目:地震科技星火计划青年项目(XH20023Y);地震科技星火计划青年项目(XH20022Y)
收稿日期:2019-08-02
作者简介:李敏,女,生于1986年。硕士。主要从事岩土地震工程研究。E-mail:limin07891@163.com
通讯作者:杨立国,男,生于1989年。硕士。主要从事场地、抗震设计研究。E-mail:1032576484@qq.com
Relationship between Shear Wave Velocity and Soil Depth of Typical Soil Layers in Hangzhou Area
Abstract:      Based on abundant of shear wave velocity from lots of boreholes in Hangzhou, three common regression models were used to analyze the relationship between shear wave velocity and soil buried depth. In the case of site classification and unclassification, this paper analyzed the optimal fitting formulas and prediction range of five types of soils in Hangzhou. In this paper, the reliability of all recommended models were verified, and the regional differences of conventional silty clay and silt were analyzed. The research results show that the regression equations of shear wave velocity and buried depth recommended in this paper has good reliability. Regions, geotechnical types and predicted depths have significant effects on the reliability of the relationship between shear wave velocity and soil buried depth. Therefore, to ensure the reliability of the selected models, local statistical models should be put in the first place, otherwise, it is necessary to verify the geotechnical types and the prediction depth of the selected models. Influenced by regions, geotechnical types and prediction depths, considering site classification does not necessarily improve the prediction accuracy of statistical models, which has uncertainty in practical engineering applications.
Keywords:  Shear wave velocity  Buried depth  Site classification  Regression analysis
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