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자료유형
학술저널
저자정보
Kim, Hyeong-Sin (Department of Earth and Environmental Sciences, Chungbuk National University) Yun, Hyun-Seok (Department of Earth and Environmental Sciences, Chungbuk National University) Chae, Byung-Gon (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources) Choi, Jung-Hae (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources) Seo, Yong-Seok (Department of Earth and Environmental Sciences, Chungbuk National University)
저널정보
대한지질공학회 The Journal of Engineering Geology 지질공학 제25권 제1호
발행연도
2015.1
수록면
9 - 20 (12page)

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A strainmeter goes through a period of instability immediately after installation. To determine the stability of strainmeters installed around the Andong fault zone, South Korea, an x-MR control chart analysis and a T<sup>2</sup> control chart analysis were conducted. The x-MR control chart analysis used an empirically determined 3σ control limit line to identify abnormal data in recently installed strain gauges. In the T<sup>2</sup> control chart analysis, the control limit line was set at a confidence of 95%. A comparison of the early stage of measurement with the terminal stage of measurement for three months after installation indicates that stabilization depends on the location and direction of each strain gauge in x-MR control chart analysis. In the T<sup>2</sup> control chart analysis, the number of values exceeding the control limit line decreased as the terminal stage was approached. Based on these results, it is suggested that the 3σ control limit line of an x-MR control chart can be used as a standard for single gauge stability, and that the 95% confidence limit of a T<sup>2</sup> control chart analysis could be used as the standard for the stability of multi-gauge strainmeters.

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