灰关联分析在确定土层剪切波速中的应用
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摘要
土层剪切波速是土层动力特性和场地类别评判以及结构抗震所需要的重要参数。很多地区基于已有统计资料,取得了剪切波速与深度之间及标准贯入值之间的统计关系。但标准贯入值、钻孔深度对剪切波速估值的具体影响程度和主次关系如何仍未知。该文尝试引入系统的理论方法—灰色关联分析方法分析钻孔深度、标准贯入值对剪切波速影响的主次关系,得出土层标贯击数与相应土层剪切波速之间具有很好的关联性,而土层深度对剪切波速影响的关联度一般,应该用土层标贯数据进行剪切波速估值公式拟合的结论。
The soil layer shear wave velocity is the important parameter of dynamic characteristic of soil layer and evaluation for site classification.Also it is the key parameter of structural anti-seismic design.According to the existing statistical data,some areas have obtained the statistical relations between shear wave velocity,the borehole depth and blow counts of SPT.How the blow counts of SPT and borehole depth affecting the estimate value of shear wave velocity concretely and what is the major and minor relationship are still unknown.This article tries to analyze the influential primary and secondary relations of borehole depth,the blow counts of SPT to shear wave velocity by grey correlation analysis method,so it obtains that blow counts of SPT of soil layer has good relevance to corresponding shear wave velocity,but the soil layer depth hasn′t good relationship with shear wave velocity.The conclusion shows that we could use the fitting of the estimation formula of shear wave velocity with blow counts of SPT of soil layer.
The soil layer shear wave velocity is the important parameter of dynamic characteristic of soil layer and evaluation for site classification.Also it is the key parameter of structural anti-seismic design.According to the existing statistical data,some areas have obtained the statistical relations between shear wave velocity,the borehole depth and blow counts of SPT.How the blow counts of SPT and borehole depth affecting the estimate value of shear wave velocity concretely and what is the major and minor relationship are still unknown.This article tries to analyze the influential primary and secondary relations of borehole depth,the blow counts of SPT to shear wave velocity by grey correlation analysis method,so it obtains that blow counts of SPT of soil layer has good relevance to corresponding shear wave velocity,but the soil layer depth hasn′t good relationship with shear wave velocity.The conclusion shows that we could use the fitting of the estimation formula of shear wave velocity with blow counts of SPT of soil layer.
引文
1兰景岩,薄景山,吕悦军.剪切波速对设计反应谱的影响研究.震灾防御技术,2007,1(2):19~24
2齐文浩,刘德东,张宇东,等.剪切波速推测的工程应用.防灾科技学院学报,2007,4(5):17~20
3刘曾武.弹性波速度现场测试的方法和技术.地震小区划理论与实践.北京:地震出版社,1989.122~133
4薄景山.场地分类和设计反应谱调整方法研究.哈尔滨:中国地震局工程力学研究所,1998
5 GB50191-93构筑物抗震设计规范
6刘思峰,党耀国,方志耕.灰色系统理论及其应用.北京:科学出版社,2004
7邓聚龙.灰色系统理论教程.武汉:华中理工大学出版社,1990
8邓聚龙.灰理论基础.武汉:华中理工大学出版社,2002
2齐文浩,刘德东,张宇东,等.剪切波速推测的工程应用.防灾科技学院学报,2007,4(5):17~20
3刘曾武.弹性波速度现场测试的方法和技术.地震小区划理论与实践.北京:地震出版社,1989.122~133
4薄景山.场地分类和设计反应谱调整方法研究.哈尔滨:中国地震局工程力学研究所,1998
5 GB50191-93构筑物抗震设计规范
6刘思峰,党耀国,方志耕.灰色系统理论及其应用.北京:科学出版社,2004
7邓聚龙.灰色系统理论教程.武汉:华中理工大学出版社,1990
8邓聚龙.灰理论基础.武汉:华中理工大学出版社,2002
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