Journal of Central South University

, Volume 24, Issue 5, pp 1190–1196 | Cite as

Grouting diffusion of chemical fluid flow in soil with fractal characteristics

  • Zi-long Zhou (周子龙)
  • Xue-ming Du (杜雪明)
  • Zhao Chen (陈钊)
  • Yun-long Zhao (赵云龙)
Article
  • 46 Downloads

Abstract

The chemical fluid property and the capillary structure of soil are important factors that affect grouting diffusion. Ignoring either factor will produce large errors in understanding the inherent laws of the diffusion process. Based on fractal geometry and the constitutive equation of Herschel-Bulkley fluid, an analytical model for Herschel-Bulkley fluid flowing in a porous geo-material with fractal characteristics is derived. The proposed model provides a theoretical basis for grouting design and helps to understand the chemical fluid flow in soil in real environments. The results indicate that the predictions from the proposed model show good consistency with the literature data and application results. Grouting pressure decreases with increasing diffusion distance. Under the condition that the chemical fluid flows the same distance, the grouting pressure undergoes almost no change at first and then decreases nonlinearly with increasing tortuosity dimension. With increasing rheological index, the pressure difference first decreases linearly, then presents a trend of nonlinear decrease, and then decreases linearly again. The pressure difference gradually increases with increasing viscosity and yield stress of the chemical fluid. The decreasing trend of the grouting pressure difference is non-linear and rapid for porosity ϕ >0.4, while there is a linear and slow decrease in pressure difference for high porosity.

Key words

grouting diffusion Herschel-Bulkley fluid porous media fractal grouting pressure 

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Copyright information

© Central South University Press and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Zi-long Zhou (周子龙)
    • 1
  • Xue-ming Du (杜雪明)
    • 1
  • Zhao Chen (陈钊)
    • 2
  • Yun-long Zhao (赵云龙)
    • 1
  1. 1.School of Resources and Safety EngineeringCentral South UniversityChangshaChina
  2. 2.Guangxi Double Elephant Construction Limited Liability CompanyNanningChina

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