考虑黏度空间衰减的宾汉姆流体柱形渗透注浆机制研究

doi:10.13722/j.cnki.jrme.2021.1223

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Abstract Infiltration effect exists in the process of low permeability porous media infiltration grouting，resulting in uneven spatial distribution of slurry particle concentration and viscosity，which seriously affects the grouting effect. Through one-dimensional visual grouting test，the occurrence conditions and influencing factors of percolation effect were studied，and the spatial distribution expression of the viscosity attenuation rate considering the influence of the water-cement ratio was obtained，and a theoretical formula of Bingham fluid column seepage grouting considering the spatial attenuation of viscosity was derived. Based on computer programming technology and relying on Comsol Multiphysics platform，the two-dimensional numerical simulation program of the theoretical formula was obtained by the secondary development. On this basis，the simulation analysis and model test under different grouting pressures and water-cement ratios were carried out to verify the correctness of the theoretical mechanism. The results show that the concentration and viscosity of grout particles decrease obviously along the seepage path when the seepage effect occurs，and the diffusion radius and permeability pressure obtained by adopting the Bingham fluid column seepage grouting diffusion formula considering the spatial attenuation effect of viscosity are closer to the measured values. Therefore，the spatial attenuation of viscosity caused by percolation effect cannot be ignored，and the new theoretical formula can better reflect the diffusion law of Bingham fluid when percolation effect occurs in low permeability strata. The research results can provide theoretical and technical support for grouting design and construction of low permeability strata.

Key words： seepage mechanics low permeability porous media the percolation effect Bingham fluid cylindrical diffusion；osmotic grouting

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	Articles by authors
	WANG Qinglei1
	2
	ZHU Yongquan1
	LI Wenjiang1
	CUI Pengbo1
	2
	PAN Yingdong3

Cite this article:

WANG Qinglei1,2,ZHU Yongquan1, et al. Study on the mechanism of column permeation grouting of Bingham fluid considering the spatial attenuation of viscosity[J]. , 2022, 41(8): 1647-1658.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1223 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I8/1647

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