Abstract
The convenience and effectiveness of monitoring methods is of great significance for slope stability evaluation. In this study, a new noncontact monitoring method based on a photogrammetric system is developed for measuring the slope surface displacement. This method monitors the slope surface displacement by using a camera and measuring plate, and a new marker design method is proposed for improving the measurement accuracy. According to the relationship between the change of the marker pixel number in the image and the relative displacement, three-dimensional displacement measurement is performed. Theoretical analysis and experimental results show that the proposed method has attractive features, such as a high precision, a low cost, simple equipment, and an easy setup.
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