Abstract

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Title:: Quantitative Analysis of Soft Clay Three-dimensional Porosity Based on SEM Image Information

Author(s):: XU Ri-qing; DENG Yi-wen; XU Bo; LAI Jian-ping; ZHAN Xue-gui; XU Li-yang; LU Jian-yang; 1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, Zhejiang, China; 2. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou 310058, Zhejiang, China; 3. Hangzhou Wulin Square Underground Mall Counstruction Co., Ltd., Hangzhou 310058, Zhejiang, China;4. Yunnan Jiaotong College, Kunming 650101, Yunnan, China

Keywords:: microstructure; soft clay; SEM image; quantification; three-dimensional porosity; plane porosity; calculation model; binarization processing

Abstract:: In order to obtain SEM image information for soft clay microstructure quantitative research, a larger number of SEM images for soft clay in Zijingang of Hangzhou area were scanned; characteristics of soft clay microstructure porosity were described qualitatively, and three-dimensional porosity calculation model was built based on Image-pro Plus(IPP) software; according to calculus thought, three-dimensional porosity of soft clay was obtained; the connection between the feasibility of three-dimensional calculation model and the number and size of soft clay porosity changing with the threshold was studied; the relationship between plane porosity calculated by binarization processing and three-dimensional porosity obtained by three-dimensional calculation model was discussed. The results show that three-dimensional porosity calculation model is feasible, and statistical results conform to the logic of three-dimensional spatial distribution of pore; comparing with plane porosity calculated by binarization processing, the three-dimensional porosity obtained by three-dimensional calculation model is closer to the real situation; this method has a clear thinking and establishes a new approach for the quantitative research of microstructure of soft clay.