不同类型洞体应变仪的观测差异性分析

Observation Difference Analysis of Three Typesof Cave Strain Meters

摘要:

运用SPSS中聚类及PCA方法对湖北省7个台站三类基线（石英管、铟钢棒、铟钢管）洞体应变观测记录进行相关统计分析，归纳总结其潮汐参数变化特征差异，并针对观测中自然环境因素影响进行定量分析。结果显示：（1）三类基线中，铟钢棒类M₂波潮汐因子、中误差及M₁波相对噪声水平较低，铟钢棒管年均漂移量最小；（2）自然环境因素（气压、降水、雷雨、温度）对湖北地区洞体应变观测影响较为显著，等量气压影响下应变量最小的为铟钢管型，等量温度影响下应变量最小的为铟钢棒型。

Abstract:

On the basis of the strain observation data of three types of baselines (quartz tube, indium steel bar, and indium steel tube) of seven stations in Hubei Province, the variation characteristics of the tidal parameters of the baselines were summarized, and the influence of natural environmental factors on the observation was quantitatively analyzed. The clustering method and principal component analysis method in SPSS were used. Results showed the following. (1) Among the three baselines, the tidal factor and mean error of the M₂ wave and the relative noise of the M₁ wave of the indium steel tube were the lowest; the average annual drift of the indium steel bar was the smallest. (2) The natural environmental factors of air pressure, precipitation, thunderstorm, and temperature exerted a significant influence on the cave strain observation in the Hubei area. The indium steel tube had the lowest strain under equal pressure, and the indium steel bar had the lowest strain under equal temperature.