Image analysis measurement of soil particle movement during a soil–structure interface test

Abstract In this study, we describe a new microscopic measuring method, including equipment and analyzing software, for observing and measuring the movement of soil particles during a soil–structure interface test. The movement of soil particles can be recorded onto high-resolution digital image series. A correlation-based image analyzing algorithm is presented that measures the displacements of tracing points at sub-pixel accuracy from the image series. Based on the algorithm, two types of soil movement analysis, namely SMA (soil mass movement analysis) and PTA (soil particle tracking analysis), are proposed to meet the different requirements of practical measurements during an interface test. The proposed microscopic measuring method is validated by preliminary applications. The measurement results show that tangential displacements of the soil near the structure are significantly different from those of the interface. The interface thickness is estimated to be approximately five-times the average soil grain size. Structure roughness and normal stress have a marked effect on the movements of the soil particles near the structure.

[1]  Yin Zong-ze,et al.  A STUDY OF DEFORMATION IN THE INTERFACE BETWEEN SOIL AND CONCRETE , 1995 .

[2]  Ibrahim H. Sulaiman,et al.  Skin Friction for Steel Piles in Sand , 1967 .

[3]  G. Leonards,et al.  Experimental Study of Static and Dynamic Friction Between Sand and Typical Constuction Materials , 1973 .

[4]  C. Desai,et al.  Cyclic Testing and Modeling of Interfaces , 1985 .

[5]  Stein Sture,et al.  Sand Shear Band Thickness Measurements by Digital Imaging Techniques , 1999 .

[6]  Peter J. Bosscher,et al.  MEASUREMENT OF PARTICLE MOVEMENT IN GRANULAR SOILS USING IMAGE ANALYSIS , 1999 .

[7]  H. Kishida,et al.  INFLUENTIAL FACTORS OF FRICTION BETWEEN STEEL AND DRY SANDS , 1986 .

[8]  H. Kishida,et al.  Friction Between Sand and Steel Under Repeated Loading , 1989 .

[9]  K. Fakharian,et al.  CYCLIC ROTATIONAL SIMPLE-SHEAR BEHAVIOUR OF SAND-STEEL INTERFACES , 1998 .

[10]  Roman D. Hryciw,et al.  MICRODEFORMATIONS IN SANDS BY DIGITAL IMAGE PROCESSING AND ANALYSIS , 1996 .

[11]  J. G. Potyondy.  Skin Friction between Various Soils and Construction Materials , 1961 .

[12]  Y. Yoshimi,et al.  A RING TORSION APPARATUS FOR EVALUATING FRICTION BETWEEN SOIL AND METAL SURFACES , 1981 .

[13]  Liming Hu,et al.  Testing and Modeling of Soil-Structure Interface , 2004 .

[14]  Shobha K Bhatia,et al.  Frequency Distribution of Void Ratio of Granular Materials Determined by an Image Analyzer , 1990 .

[15]  H. E. Fiedler,et al.  Limitation and improvement of PIV , 1993 .

[16]  W. A. Take,et al.  Soil deformation measurement using particle image velocimetry (PIV) and photogrammetry , 2003 .

[17]  J. David Frost,et al.  UNIFORMITY EVALUATION OF COHESIONLESS SPECIMENS USING DIGITAL IMAGE ANALYSIS , 1996 .

[18]  C. Willert,et al.  Digital particle image velocimetry , 1991 .

[19]  Roman D. Hryciw,et al.  Soil Particle Size Distribution by Mosaic Imaging and Watershed Analysis , 1999 .

[20]  B. L. Mordike,et al.  Size distribution of granular materials from unthresholded images , 1989 .