Volumetric Shrinkage Monitoring of Compacted Soil Specimens Using Image Based Modeling Technique

Önal O., Gharehaghajlou A.

EXPERIMENTAL TECHNIQUES, cilt.1, sa.1, ss.1-8, 2022 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1 Sayı: 1
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s40799-022-00614-0
  • Dergi Adı: EXPERIMENTAL TECHNIQUES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1-8
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Compacted specimens prepared from four clayey soils were subjected to drying in order to monitor the volumetric shrinkage period. Specimen volumes were recorded with manual caliper readings and the proposed image-based method as the shrinkage continues. For the image-based method, a photogrammetry technique known as Structure from Motion was applied. This technique offers a complete three-dimensional solid model of objects from two dimensional images. In this technique, the object is photographed from different perspectives to construct a digital point cloud. Once a proper calibration is made, these points represent the real-world coordinates and comprehensive analyses can be made using surface data. To that end, an imaging setup was established and a parametric study was conducted on a solid calibration object for the accuracy assessment of the method. The volumes of the compacted specimens obtained with the image-based technique and conventional Vernier caliper readings were compared to each other and evaluations were made by means of volumetric strain graphs and soil shrinkage curves. The proposed shrinkage monitoring technique offered accurate, nondestructive and operator independent results.