Abstract
This paper deals with the development of a three-dimensional slope behavior monitoring method using digital photogrammetry with only simple measurement work. We report its feasibility based on the results of experimental application of the proposed system to actual slope monitoring. In the paper, an appropriate measurement system for slope behavior monitoring was established by applying the following two techniques to the existing photogrammetric technique : one technique for simply obtaining the two-dimensional distribution of displacements with accuracy of 5mm without having to set fiducial points on the slope; and the other technique for obtaining the three-dimensional distribution of coordinate values of measurement points from the geometric constraint conditions of the geodetic network. This paper presents the theoretical development of this new measurement system and actual extensive slope measurement results. The theoretical development shows that slope behavior can be identified through simple measurements. The measurement results demonstrate that the measurements conducted by the proposed system are consistent with the measurement results using conventional extensometers and survey instruments.
