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Shear Resistance of Sandy Soils Depending on Particle Shape

모래 입자의 형상과 내부마찰각의 상관관계에 관한 연구

  • Received : 2016.04.15
  • Accepted : 2016.05.25
  • Published : 2016.06.30

Abstract

This study presents the correlations between quantified particle shape parameters and internal friction angles for nine sand specimens including six natural sands and three crushed sands. Specimens are subjected to 3D X-ray computed tomographic imaging and their particles are segmented through the aid of image processing techniques. Shapes of segmented particles are then quantified through two shape parameters such as sphericity and elongation. The direct shear apparatus enables us to measure peak and critical state friction angles of sand specimens of distinct relative densities. The gathered data show that decreasing sphericity and increasing elongation cause increases in peak and critical state friction angle with similar gradients.

Keywords

Shear strength;Particle shape;Image processing;3D X-ray CT

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Acknowledgement

Supported by : (재)한국이산화탄소포집 및 처리연구개발센터, 한국연구재단