Influence and prediction of compaction degree and drying-wetting cycle on soil water characteristic curve of Yudong silt

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Influence and prediction of compaction degree and drying-wetting cycle on soil water characteristic curve of Yudong silt

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[1]Zhang Tao,Le Jinchao,Zhang Junran.Influence and prediction of compaction degree and drying-wetting cycle on soil water characteristic curve of Yudong silt[J].Journal of Zhengzhou University (Engineering Science),2016,37(06):53-57.[doi:10.13705/j.issn.1671-6833.2016.03.027]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 37卷 Number of periods: 2016 06 Page number: 53-57 Column: Public date: 2016-12-31

Title:: Influence and prediction of compaction degree and drying-wetting cycle on soil water characteristic curve of Yudong silt

Author(s):: Zhang Tao1; Le Jinchao2; Zhang Junran3; 1. School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, Henan; 2. Department of Architectural Engineering, Henan Communication Vocational and Technical College, Zhengzhou 451400, Henan; 3.North China University of Water Conservancy and Hydropower, Henan Province Rock and Soil Mechanics Key Laboratory of Engineering and Structural Engineering, Zhengzhou, Henan, 450045

Keywords:: compaction degree; drying-wetting cycle; Yudong silt; soil water characteristic curve; prediction

CLC:: -

DOI:: 10.13705/j.issn.1671-6833.2016.03.027

Abstract:: A series of the soil-water characteristic curve ( SWCC) tests for Yudong silt with different compac-tion degree and wetting-drying cycles were conducted by the pressure plate apparatus with the GCTS model. The test results showed that the SWCC curves had obvious hysteresis phenomenon during the drying and wet-ting cycles when the value of the suction was less than 100 kPa. While the value of the suction was greater than 100 kPa, the SWCC hysteresis phenomenon was not obvious. The SWCC was expressed by the relations between suction and water content, the SWCC curves have a shift to the bottom and left trend with the increase in the compaction degree and drying-wetting cycles. When the SWCC is expressed by the relations between suction and saturation, the SWCC curves had a shift to the top and right trend with the increase in the compac-tion degree, while the SWCC curves had a shift to the bottom and trend with the increase in the wetting-drying cycles. The Lsqcurvefit function of the Matlab was adopted for fitting of the SWCC curves to get the fitting pa-rameters of the Van Genuchten model. Through the relations between the fitting parameters and the compaction degree or drying-wetting cycles, the practical methods were proposed to predict the Yudong silt SWCC with different compaction degree or drying-wetting cycles.

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