摘要
依据哈尔滨市核心区域的钻孔实测剪切波速数据,定性分析了剪切波速与土层深度的关系;利用拟合优度为评价指标,建议了在不同场地类别、不同岩土类型的情况下用于统计剪切波速与埋深关系的最优函数模型,以最小二乘法确定了推荐模型参数;并分别选取了Ⅱ类场地比Ⅲ类场地的实测结果进行误差分析。结果表明在研究区域内,相同场地类别的细粒土的剪切波速与埋深的相关性高于砂土及碎石土;同种类型的土体Ⅱ类场地的剪切波速与埋深的相关性比Ⅲ类场地的更高;二次函数模型在不同场地类别、不同岩土类型的拟合精度普遍优于其他函数模型,且得到的不同深度的剪切波速结果较为可靠,可作为无波速测试场地参考使用。
Based on the shear wave velocity data of boreholes in the core area of Harbin City,the relationship between shear wave velocity and depth of soils is qualitatively analyzed;The goodness of fit is taken as the evaluation index to get an optimal function model which is proposed to calculate the relationship between shear wave velocity and depth under different site types and different geotechnical types,the recommended model parameters are determined by the least square method;The error analysis of the measured results of classⅡsite is compared with that of classⅢsite.The results show that the correlation between shear wave velocity and depth of fine-grained soil in the same site type is higher than that of sand and gravel soil;The correlation between shear wave velocity and depth of the same type of soil in classⅡsite is higher than that in classⅢsite;The fitting accuracy of quadratic function model in different site types and different geotechnical types is generally better than that of other function models,and the results of shear wave velocity in different depths are relatively reliable,which can be used as a reference for sites whose shear wave velocities are not tested.
作者
宋健
师黎静
党鹏飞
李昕蕾
SONG Jian;SHI Lijing;DANG Pengfei;LI Xinlei(Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China;Key Laboratory of Earthquake Engineering and Engineering Vibration, Harbin 150080, China)
出处
《建筑结构》
CSCD
北大核心
2020年第S01期1088-1092,共5页
Building Structure
基金
国家重点研发计划项目(2018YFC1504004,2018YFC1504601)
国家自然科学基金面上项目(51978635)
关键词
剪切波速
土层深度
场地类别
岩土类型
最小二乘法
shear wave velocity
depth of soils
site classification
types of rock and soil
least squares method
作者简介
宋健,硕士研究生,Email:913606737@qq.com。
