Abstract
To evaluate ground displacement reasonably, we propose an analyzing method of ground behavior by the principal component analysis. About the laboratory compression test with clear deformation behavior, we compared specimen deformation under compression with the calculated deformation mode by principal component analysis. As a result, it was shown that this method can divide the total displacement of specimen between the barrel type deformation and shear deformation. We applied this method to displacement data measured by the electro-optical distance meters on an excavation slope. As results, the following two points of the movement of the slope were clarified. After the slope moves in the direction of the valley in the early winter, it returns in the direction of the mountain The movement is larger than the cut slope in natural ground. Next, this method was applied to the displacement data measured by the electro-optical distance meters and borehole inclinometer in the slope near an existing hydroelectric power plant, and three-dimensional slope behavior was examined. It was clarified that the movement of the slope in the direction of the valley accounted for 70 percent of the total movement. This method has possibilities as the estimation on behavior of slope.
