CAHNGE POINT DETECTION METHOD OF RTK-GNSS DATA IN SLOPE MANAGEMENT

Abstract

 Various monitoring data has been obtained to prevent slope disasters. In this paper, based on GNSS data, We propose a method of change point detection for slope management that automatically detects whether or not displacement has occurred on the slope. In particular, we proposed a methodology to set management indicator for change point detection, considering slope-management by change point detection of GNSS data using Change Finder. Moreover, we verified the applicability and scope of Change Finder, such as whether or not change points can be detected by distinguishing measurement error included in GNSS data from sudden slope displacement, by using the actually GNSS data obtained from expressway. As a result, we showed that change points can be detected when the displacement of the slope exceeds 2.5 times the sample standard deviation of GNSS data.