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施工土体载荷变化对涉县台水管倾斜仪观测的影响
张英杰1,2, 马栋3, 赵长红2, 王秋根2
1.中国科学技术大学, 地球和空间科学学院, 合肥 230026;2.涉县地震台, 河北涉县 056400;3.河北省地震局, 石家庄 050021
摘要:
由于地磁观测场地施工动土,引起河北涉县地震台载荷变化。本文分别用质点模型、二维模型和三维模型计算了载荷变化对山洞水管倾斜仪的影响,结果表明,观测曲线年变和月变受影响不明显,但内精度有所降低;与质点模型相比,二维模型与三维模型更接近实际情况。
关键词:  载荷模型  载荷变化  垂向位移  水管倾斜仪  内精度
DOI:
分类号:P315
基金项目:中国地震局“三结合”课题(3JH-201902007)资助
The Interference of Load Change by Construction to Water Tube Tilt Measurement at Shexian Magnetic Station
Zhang Yingjie1,2, Ma Dong3, Zhao Changhong2, Wang Qiugen2
1.School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;2.Shexian Seimic Station, Shexian 056400, Hebei, China;3.Hebei Earthquake Agency, Shijiazhuang 050021, China
Abstract:
The influence of load change by construction to water tube instrument at Shexian magnetic station was simulated by using point loading model,two-dimensional and three-dimensional loading models. The results showed that there was not obvious influence on annual and monthly variances of water tube instrument by loading change. The convergence values of two-dimensional and three-dimensional tend to be consistent. We found that the inner accuracies of water tube instrument decreased during the period of taking earth away based on the analysis of inner accuracies and operations of two components of water tube instrument.
Key words:  Load model  Load changes  Vertical displacement  Water tube  Inner accuracy