E3S Web Conf.
Volume 283, 20212021 3rd International Conference on Civil, Architecture and Urban Engineering (ICCAUE 2021)
|Number of page(s)||8|
|Section||Research on Civil Engineering and Geotechnical Hydrological Structure|
|Published online||07 July 2021|
Experimental Study on Nonlinear Characteristics of Permeability and Compressibility of Soft Clay
1 CCCC Tianjin Port Engineering Institute Co., Ltd., Tianjin 300222, China
2 CCCC First Harbour Engineering Co., Ltd., Tianjin 300461, China
3 Key Laboratory of Port Geotechnical Engineering of Ministry of Communications, Tianjin 300222, China
4 Key Laboratory of Port Geotechnical Engineering of Tianjin, Tianjin 300222, China
5 School of Civil Engineering, Tianjin University, Tianjin, 300072, China
* Chang-xi YUE: email@example.com
Consolidation and permeability tests were conducted on soft clays with different liquid limit by GDS consolidation apparatus. Some fitting parameters were studied for 4 common nonlinear permeability models based on the test data. But different soil samples have different parameters for the same model. In order to find the universal law of permeability coefficient and compressibility with the soil property and void ratio, the void ratio was normalized by the liquid void ratio eL, and the relationship of e/eL with logkv and logp were established based on the test data. The Chapman-Richard curve fitting model was adopted to best fit the obtained time-compression data. The relationship between e/eL with logkv was further verified using 30 groups of test data of permeability collected from China and abroad. The relationship between e/eL with logp was also discussed in this paper, and the fitted curves and nonlinear equations was further simplified into two linear equations at the point of e/eL=0.9 so as to consistent with the well-known theory. The nonlinear equations can be used to calculate the permeability and compressibility according to the void ratio and liquid limit.
© The Authors, published by EDP Sciences, 2021
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