气象因素对倾斜仪观测干扰特征分析

采用常熟台水管仪与垂直摆2009～2015年观测数据,研究了气压、降雨、气温、洞温等因素对地倾斜观测的影响特征。结果表明，降雨对地倾斜观测数据干扰最为显著，表现为NS分量发生南倾，EW分量发生西倾，量级上NS分量受干扰程度比EW分量大，垂直摆受干扰程度比水管仪大；气压变化影响表现为短周期扰动，并导致日值曲线出现短时间畸变；气温及洞温变化影响观测值出现明显的年变规律和年变幅变化,对日观测值影响不明显。

Analysis of Meteorological Factors on Tiltmeter Interference Characteristics

We use the Changshu seismic station water tube meter and vertical tilt data from the 2009~2015 observed pendulum, in relation to changes in the natural environment (air pressure, rainfall, temperature, temperature of the cave, etc.). The characteristics of these influences are analyzed, and the results show that: (1) rainfall interference on observation data is most significant for the NS component with south dipping and the EW component occurs with west dipping; the magnitude of the NS component interference is larger than that of the EW component; and the vertical pendulum interference is greater than that of water tube tiltmeter. (2) Pressure changes affect short cycle micro dynamic interference which leads to the daily value curve short time distortion. (3) The variation of the temperature and the temperature of the tunnel caused by the change of the observed value is obvious, but the effect of the observation value is not obvious.