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目前我国强震台网的部分台站场地资料尚不完整,很大程度限制了我国强震数据的广泛应用。为改变这一现状,利用日本KiK-net台站的场地钻孔资料和强震记录,按照规范对其中279个台站进行场地分类,利用谱比法统计我国Ⅰ,Ⅱ,Ⅲ三类场地的标准谱比曲线,并通过分析谱比曲线卓越周期、谱比峰值和谱形差异,提出适合我国抗震规范场地类别划分的经验方法。利用四川地区的强震台站钻孔资料进行方法验证,说明地域性差异对本场地分类方法准确率的影响不大。最后,处理了中国大陆2007~2011年的强震记录,按照该方法对113个强震台站进行场地分类。
At present, the information of some station sites of strong earthquake network in our country is still not complete, which limits the extensive application of strong earthquake data in our country to a great extent. In order to change this situation, using the borehole data and strong earthquake records from the site of KiK-net station in Japan, 279 sites were classified according to the codes, and the statistics of the three types of sites Ⅰ, Ⅱ and Ⅲ in China Standard spectrum ratio curve, and through the analysis of the spectral period ratio of the excellent cycle, spectral peak and spectral differences, proposed for China’s seismic site classification of empirical methods. The data from boreholes in the strong earth stations in Sichuan Province are used to verify the method, which shows that regional differences have little effect on the accuracy of the site classification method. Finally, the strong earthquakes recorded in mainland China from 2007 to 2011 are processed, and 113 strong earth stations are classified according to the method.