Application of a photogrammetric technique to a model tunnel

Close range photogrammetric technique (digital imaging process) is a useful non-intrusive method for studying deformation patterns imposing no constraints on the material. In this study, the close range photogrammetric technique for a laboratory two-dimensional model tunnel test using the multi-sized rod material was introduced and consequently, the displacement and strain data were provided to compare with the finite element analysis. The close photogrammetric technique with a linear strain theory showed a remarkable agreement with the physical model data.