Analysis of the diffusion range of the sleeve valve pipe permeation grouting column-hemispheric under the variation of the permeability of porous media

Qi Peng; Shaobo Yang; Guangcan Shan; Nan Qiao; Qi Peng; Shaobo Yang; Guangcan Shan; Nan Qiao

doi:10.3934/era.2023351

Electronic Research Archive

2023, Volume 31, Issue 11: 6928-6946. doi: 10.3934/era.2023351

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Analysis of the diffusion range of the sleeve valve pipe permeation grouting column-hemispheric under the variation of the permeability of porous media

1.
School of Civil Engineering, Central South University, Changsha 410075, Hunan, China
2.
China Railway Guangzhou Bureau Co., Ltd., Guangzhou 510088, Guangdong, China
3.
China Railway 11th Bureau Group Co., Ltd., Wuhan 430061, Hubei, China

Received: 11 June 2023 Revised: 10 October 2023 Accepted: 15 October 2023 Published: 27 October 2023

Grouting is widely used to solve problems such as water inrush and collapse in tunnels and subways, with permeation grouting being the most common method. This study explores the influence of fluid flow resistance on the permeability of porous media and derives an analytic expression for the variation of permeability in porous media based on the diffusion law of cement-based grout columns-hemispherical diffusion. Based on this, a Newtonian fluid permeation grouting column-hemispherical diffusion model considering the variation of permeability in porous media is established, combining the rheological equation and the equilibrium equation of the Newtonian fluid. The theoretical results considering the influence of fluid flow resistance on the permeability of porous media are consistent with the results of existing laboratory tests and numerical simulations, which are closer to the experimental results, thus verifying the effectiveness of the proposed theoretical mechanism. Parameter analysis shows that with the increase of grouting pressure and grouting time, the diffusion radius of the Newtonian fluid infiltration grouting, considering the variation of permeability in porous media, increases rapidly and then increases slowly, and with the increase of porous media porosity, its radius decreases gradually. The research results can provide theoretical support for selecting grouting parameters and quality control in porous media infiltration grouting engineering practice.
- permeation grouting,
- rock and soil porous media,
- permeability of porous media,
- rheological equation,
- equilibrium equation
Citation: Qi Peng, Shaobo Yang, Guangcan Shan, Nan Qiao. Analysis of the diffusion range of the sleeve valve pipe permeation grouting column-hemispheric under the variation of the permeability of porous media[J]. Electronic Research Archive, 2023, 31(11): 6928-6946. doi: 10.3934/era.2023351

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Abstract

Grouting is widely used to solve problems such as water inrush and collapse in tunnels and subways, with permeation grouting being the most common method. This study explores the influence of fluid flow resistance on the permeability of porous media and derives an analytic expression for the variation of permeability in porous media based on the diffusion law of cement-based grout columns-hemispherical diffusion. Based on this, a Newtonian fluid permeation grouting column-hemispherical diffusion model considering the variation of permeability in porous media is established, combining the rheological equation and the equilibrium equation of the Newtonian fluid. The theoretical results considering the influence of fluid flow resistance on the permeability of porous media are consistent with the results of existing laboratory tests and numerical simulations, which are closer to the experimental results, thus verifying the effectiveness of the proposed theoretical mechanism. Parameter analysis shows that with the increase of grouting pressure and grouting time, the diffusion radius of the Newtonian fluid infiltration grouting, considering the variation of permeability in porous media, increases rapidly and then increases slowly, and with the increase of porous media porosity, its radius decreases gradually. The research results can provide theoretical support for selecting grouting parameters and quality control in porous media infiltration grouting engineering practice.

References

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