Column-Hemispherical Penetration Grouting Mechanism for Newtonian Fluid Considering the Tortuosity of Porous Media

Abstract

The intricate morphology of porous media can considerably affect the progression of penetration and the diffusion of grouting slurry. In this study, a Newtonian fluid’s refined seepage motion equation was proposed to incorporate the impact of tortuosity on the grouting process into gravel soil, and the column-hemispherical penetration grouting mechanism was analyzed using the method of theoretical analysis. Utilizing secondary-development programming techniques, a numerical simulation program was developed with COMSOL Multiphysics to model the penetration grouting mechanism of a Newtonian fluid in a column-hemispherical pattern, considering a medium’s tortuosity. The penetration grouting process of Newtonian cement into gravel soils was then simulated. Finally, the theoretical analysis, experimental values, and numerically simulated values were compared.The findings suggested that incorporating the tortuosity of porous media is more efficacious in depicting the penetration and diffusion behavior for Newtonian fluid grouting in porous media, as compared to omitting the tortuosity. The findings of this study contribute to a better understanding of grouting engineering in porous media strata, guiding practical design and construction.

Causal mechanisms and evolution processes of “block-burst” debris flow hazard chains in mountainous urban areas: a case study of Meilong gully in Danba county, Sichuan Province, China

“…With changes in channel slope and width, water-sediment separation can occur in certain sections, resulting in sediment accumulation in the channel. Therefore, the transformation of debris flow sources is a complex process (Yang et al, 2023c;Zhao et al, 2023), and the design of prevention and control engineering is mainly based on the historical records of debris flow disasters and the calculation results of previous debris flow characteristics.…”

Feature Extraction Algorithm of Massive Rainstorm Debris Flow Based on Ecological Environment Telemetry

“…By changing the position of the solid center of mass and the quantity of mud fluid and solid particles, it is possible to obtain different flow compositions, including information such as the front of debris flow composed of solid substances or the tail of debris flow containing water, and thus realize the downstream evolution of debris flow density using the obtained relevant information. However, this method is used to analyze debris flow with relatively few components and cannot accurately reflect the real flow situation of debris flow [8].…”