Application of close range photogrammetry to passive and active retaining wall model tests and numerical analysis

摘要

Understanding behavior of soil may contribute to design retaining walls safely and efficiently.rnTherefore, in this study, behavior of ground by active and passive retaining walls was compared through finiteelementrnanalysis and laboratory model test using close range photogrammetric method. From the close rangernphotogrammetry, deformation of sandy ground according to roughness and horizontal displacements of thernmodel retaining wall was recorded and analyzed. The roughness was compared to interface factor. Also, verticalrnhorizontal displacement and shear strain of the sandy ground were analyzed by PLAXIS 2D. The result of comparisonrnbetween the numerical analysis and the laboratory model test shows good agreement. Consequently, thernclose range photogrammetry with image processing can be used to measure the ground deformation accurately.rnThe relationship between the roughness of the wall and the interface factors can be used to design safely andrnefficiently.