摘要：Fractal theory and image processing technol- ogy has been more and more applied to the soil struc- ture evaluation recent years. In this study, dredger fill from the reclamation area of Chongming Island, Shanghai, were tested for the soil structure by sieve, densimeter, LPSA. MIP and SEM. Moreover, fractal values of the particles and pores based on the fractal theory, as well as the morphological and statistical parameters based on computer image processing technology were both obtained; correlations between fractals with the morphology and the discreteness ofdirectional angle were further analyzed. The resultsrevealed that the fractal dimension of particle size distribution (PSD) had two scale-free intervals (SFD) with 0.075 mm as an important demarcation point. The Menger model was more suitable to describe the fractal characteristics of the relatively smaller pores (< 4 um). An abnormal segment caused by the ink- bottle pores occurred at the junction of the macropore and the mesopore. Fractal values ob- tained from SEM had some limitations in describing the real complexity of the soil particles and pores. Pores with larger equivalent diameter tended to have more complex structures; the directional angle dis- creteness of the soil particle had some influence on its complexity.
关键词：Soil structure;Particle size distribution (PSD);Mercury in-
trusion porosimetry (MIP);Scanning electron microscope
(SEM);Fractal;Image processing
