基于载荷模型的张家口台石英摆倾斜仪异常变化定量分析  

QUANTITATIVE ANALYSIS OF ABNORMAL VARIATION OF QUARTZ PENDULUM TILTMETER IN ZHANGJIAKOU SEISMOSTATION BASED ON LOAD MODEL

作　　者：侯晓真[1,2] 屈曼[1] 马栋[1] 陈建国[1] 周亚 王曰风 高晨 HOU Xiaozhen;QU Man;MA Dong;CHEN Jianguo;ZHOU Ya;WANG Yuefeng;GAO Chen(Hebei Earthquake Agency,Shijiazhuang 050021,China;Innocative Research Team of Hebei Earthquake Agency for Seismographs Calibration,Valuation and Selection of Observation Sites,Shijiazhuang 050021,China;Zhangjiakou Earthquake Monitoring Center Station,Zhangjiakou 0150009 China)

机构地区：[1]河北省地震局,河北石家庄050021 [2]河北省地震局测震专业仪器系统检测评估与观测场地遴选创新团队,河北石家庄050021 [3]张家口地震监测中心站,河北张家口075000

出　　处：《高原地震》2021年第4期27-33,共7页Plateau Earthquake Research

基　　金：中国地震局震情跟踪定向工作任务青年课题(项目编号:2021010214);中国地震局地震科技星火计划攻关项目(项目编号:XH19008)联合资助。

摘　　要：日常会商分析数据资料过程中,发现张家口地震台石英摆倾斜仪南北分量出现压性变化转平,东西分量出现东倾速率加快的变化。为做好震情跟踪及异常性质研判工作,河北地震台联合张家口地震监测中心站进行了详实的现场踏勘,并利用三种荷载计算模型对可能造成该影响的干扰源进行定量计算。根据干扰模型计算结果及干扰与异常出现的时间相关性,综合分析认为,自2021年4月底石英摆倾斜仪北南/东西向出现的异常变化系山洞周围隧道及建筑物施工所致。During the process of analyzing the daily data, we found abnormal changes of the trend turning of NS and east tilt rate of EW of the quartz pendulum tipper in Zhang Jiakou seismostation.In order to track seismic situation and analyse abnormal properties, Hebei seismic station and Zhang Jiakou Earthquake Monitoring Center Station worked together to conduct a detailed site visiting.We use the three-dimensional load model to quantify the potential interference sources, which may have caused the effect.According to the model calculation result and time correlation between the interference and the occurrence of anomalies, we think that abnormal changes of the quartz pendulum inclinometer since the end of April 2021 is caused by the construction of tunnels and buildings around the cave.

关 键 词：载荷模型 速率加快 趋势转折 石英摆倾斜仪 张家口地震台 

分 类 号：P315.725[天文地球—地震学]