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http://dx.doi.org/10.7848/ksgpc.2019.37.6.555

Soil Deformation Tracking in Model Chamber by Targetless Close-Range Photogrammetry  

Lee, Chang No (Dept. of Civil Engineering, Seoul National University of Science and Technology)
Oh, Jae Hong (Dept. of Civil Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.37, no.6, 2019 , pp. 555-562 More about this Journal
Abstract
This paper presents soil deformation measurement in model chamber based on photogrammetry. We created an aluminum framed acrylic model chamber with soil inside and applied photogrammetry to measure soil deformation caused by loading tests. The soil consists of 40% black and 60% regular sand to create image contrast in soil images. In preprocessing, the self camera calibration was carried out for IOPs (Interior Orientation Parameters), followed by the space resection to estimate EOPs (Exterior Orientation Parameters) using control points located along the aluminum frame. Image matching was applied to measure the soil displacement. We tested different matching window sizes and the effect of image smoothing. Experimental results showed that 65x65 pixels of window size produced better soil deformation map and the image smoothing was useful to suppress the matching outliers. In conclusion, photogrammetry was able to efficiently generated soil deformation map.
Keywords
Close-range Photogrammetry; Sand Chamber; Pile-load; Soil Deformation; Measurement;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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