隧洞管道型裂隙突水磁性浆液-水玻璃双液注浆扩散封堵机理研究

doi:10.11896/cldb.25040119

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Abstract To overcome the shortcomings of conventional grouting materials, such as being easily washed away and offering limited water-blocking performance, a novel magnetic self-aggregating binary grouting material has been developed. This work focuses on exploring the spatiotemporal diffusion behavior and internal pressure evolution during grouting with magnetic self-aggregating binary slurry (magnetic slurry-sodium silicate) and traditional c-s binary slurry (cement-sodium silicate) in scenarios involving water inrush in tunnel pipelines. A custom-designed visual grouting apparatus simulating pipeline-type water inrush was independently developed. The key findings are as follows:① The diffusion process of the magnetic self-aggregating slurry proceeds through four stages, self-aggregation and adsorption, layered outward expansion, hydraulic fracturing, and residual stabilization. In contrast, the c-s binary slurry exhibits a diffusion process characterized by dilution and spreading, slurry deposition, hydraulic fracturing, and residual stabilization. ②A method was proposed to delineate pressure zones within the pipeline. ③ By integrating the diffusion patterns with internal pipeline pressure data, the grouting processes of both slurry types were divided into distinct phases. ④With increa-sing grouting pressure, the sealing pressure peak of the magnetic self-aggregating slurry rises significantly faster than that of the c-s slurry. When the grouting pressure increases from 0.3 MPa to 0.5 MPa, the peak sealing pressure of the magnetic slurry improves by 60%, compared to a 32.8% increase observed with the c-s slurry. ⑤A predictive model was established to estimate internal pressure within the pipeline during the magnetic slurry grouting process. A comparison between theoretical predictions and experimental results shows an average relative error of less than 3.77%, indicating the model’s strong reliability. These findings offer valuable theoretical and practical insights for advancing the application of magnetic self-aggregating grouting materials in tunnel water inrush control.

Key words： pipeline-type water inrush grouting and sealing magnetic slurry sodium silicate c-s binary slurry binary grouting

Published: Online: 2026-04-16

CLC number:

TB333

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	Articles by authors
	LIU Jie
	GAO Chenpeng
	YANG Yunan
	CHENG Wangrun
	WANG Tiansheng
	MO Chenglin
	LI Guoyang
	GUO Shiwen

Cite this article:

LIU Jie,GAO Chenpeng,YANG Yunan, et al. Mechanism Study on the Diffusion and Sealing of Magnetic Slurry-Sodium Silicate Binary Grouting for Fracture Water Inrush in Tunnel Pipelines[J]. Materials Reports, 2026, 40(7): 25040119-9.

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https://www.mater-rep.com/EN/10.11896/cldb.25040119 OR https://www.mater-rep.com/EN/Y2026/V40/I7/25040119

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