INSPECTION OF ROCKFALL SLOPES USING 3D POINT CLOUD DATA BY DRONE-MOUNTED LASER SCANNER

Abstract

 We implement rockfall inspections based on patrols on foot, structural measures by strengthening rockfall pro tection equipment, and non-structural measures by installing rockfall detection equipment, in order to avoid rockfalls from slopes along railway lines and their impact on trains. However, since there are many rockfall slopes and many steep places, it takes a lot of effort and may involve dangerous work to inspect them. From the analysis of rockfall disasters occurred in the past, we have found that it is necessary to inspect planarly the entire slope including the priority monitoring points. We studied inspection methods with 3D point cloud data acquired by drones to effectively perform planarly inspections of the rockfall slopes, and confirmed that we can perceive the changes in the rockfall slope planarly with this method.