台风“利奇马”对钻孔体应变的扰动分析——以浙江地区为例

Disturbance analysis of borehole dilatometer by typhoon:case study of Zhejiang province

利用台风“利奇马”过境浙江期间,岱山地震台、东阳地震台钻孔体应变数据,采用数据滤波和线性回归等方法,分析了这2个台站钻孔体应变对台风的响应特征。结果表明,东阳地震台受台风引起的低气压的影响,钻孔体应变与气压同步变化;而岱山地震台受低气压和降水的共同影响,钻孔体应变与气压在变化的相关性和同步性上均有差异。气压和降水导致钻孔体应变的变化量可以通过负载力学模型进行估算求解。

In order to analyze the signature of volumetric strain at Dongyang Seismic Station and Daishan Seismic Station during the periods of typhoon“Lekima”,we use methods of linear regression and data filter to investigate the data in these two stations.The results show that the borehole dilatometer varies with the barometric loading due to typhoon at Dongyang Seismic Station,while the correlativity and synchronism between the borehole dilatometer and barometric loading exist differences due to the typhoon and precipitation at Daishan Seismic Station.The changes of borehole dilatometer resulted by barometric loading and precipitation can be estimated by loading mechanics model.