Study on permeability coefficient of saturated cohesive soil based on fractal theory

4th International Conference on Energy Equipment Science and Engineering

Zhang, Xu^1 ; Li, Ming-Bao^1 ; Sun, Yu-Zhuo^1 ; Zhu, Yu-Ting^1 ; Yang, Zhong-Han^1 ; Tian, Dong-Hong^1

School of Civil Engineering, Northeast Forestry University, Harbin, HEILONGJIANG

150040, China^1

关键词: Cohesive soils;    Effective void ratios;    Empirical formulas;    Fractal theory;    Function relationships;    Geotechnical;    Low permeability;    Saturated clay;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/242/6/062055/pdf
DOI  :  10.1088/1755-1315/242/6/062055

来源: IOP

【 摘 要 】

Because of its extremely low permeability, cohesive soil is often regarded as a very important impermeable material in geotechnical projects. Therefore, further study of the mechanism of cohesive soil infiltration has a very far-reaching significance in the field of civil engineering. In this paper, with the concept of effective void ratio, the traditional formula of soil permeability coefficient is modified. Based on the fractal dimension of fractal theory, the function relationship between void ratio and fractal dimension was established. Based on this function, the fractal dimension was used to describe the effective void ratio of saturated clay, and the fractal theory is used to correct the empirical formula of permeability coefficient of saturated cohesive soil. The formula can be used to study the permeability of saturated cohesive soil and improve the theory of percolation and the solution of permeability coefficient.