Seepage–Fractal Model of Embankment Soil and Its Application

Fractal and Fractional

Di Feng¹  Binbin Yang²  Xiaoming Zhao²  Shichong Yuan³  Zhenzhou Shen⁴ 

[1] College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;School of Civil Engineering, Xuchang University, Xuchang 461000, China;School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China;Yellow River Institute of Hydraulic Research, No.45 Shunhe Road, Zhengzhou 450003, China;

关键词: fractal dimension;    hydraulic gradient;    random field;    hydraulic conductivity;    porosity;   

DOI  :  10.3390/fractalfract6050277

来源: DOAJ

【 摘 要 】

Over time and across space, the hydraulic conductivity, fractal dimension, and porosity of embankment soil have strong randomness, which makes analyzing seepage fields difficult, affecting embankment risk analysis and early disaster warning. This strong randomness limits the application of fractal theory in embankment engineering and sometimes keeps it in the laboratory stage. Based on the capillary model of porous soil, an analytical formula of the fractal relationship between hydraulic conductivity and fractal dimension is derived herein. It is proposed that the influencing factors of hydraulic conductivity of embankment soil mainly include the capillary aperture, fractal dimension, and fluid viscosity coefficient. Based on random field theory and combined with the embankment parameters of Shijiu Lake, hydraulic conductivity is discretized, and then the soil fractal dimension is approximately solved to reveal the internal relationship between hydraulic gradient, fractal dimension, and hydraulic conductivity. The results show that an increased fractal dimension will reduce the connectivity of soil pores in a single direction, increase the hydraulic gradient, and reduce the hydraulic conductivity. A decreased fractal dimension will lead to consistency of seepage channels in the soil, increased hydraulic conductivity, and decreased hydraulic gradient.

【 授权许可】

Unknown