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张家口台VS型垂直摆倾斜仪从2003年安装运行至2011年,9年未进行调零操作,仪器调零频次远低于其他台站。采用极差分析的方法对垂直摆倾斜仪的稳定性进行分析,认为张家口台VS型垂直摆倾斜仪工作状态较其他台站同类仪器稳定。通过对张家口台VS型垂直摆倾斜仪减少调零频次的技术措施进行分析,认为在形变观测中采取洞室保温防潮、增加信号输出防雷、减小仪器摆体底脚高差、在放底脚垫块处进行整平抛光、仪器摆体安装在洞室中部等措施,可以减少仪器的零点漂移,保持仪器工作状态的稳定。
The VS type vertical pendulum inclinometer of Zhangjiakou station was installed and operated from 2003 to 2011, and the zeroing operation has not been carried out for 9 years. The frequency of zero adjustment of the instrument is much lower than that of other stations. Analysis of the stability of the vertical pendulum inclinometer by using the method of range analysis shows that the working condition of VSJ vertical pendulum inclinometer in Zhangjiakou is stable compared with that of other stations. Through the analysis of the technical measures to reduce the frequency of zero adjustment of VS type vertical pendulum inclinometer in Zhangjiakou station, it is considered that the cavern insulation moisture proofing is adopted in the deformation observation, the signal output lightning protection is increased, the height difference of the pendulum foot of the instrument is reduced, Foot pad at the level of polishing, the instrument mounted in the middle of the tunnel body and other measures to reduce instrument zero drift, to maintain the stability of the instrument working condition.