Mechanism Study on the Diffusion and Sealing of Magnetic Slurry-Sodium Silicate Binary Grouting for Fracture Water Inrush in Tunnel Pipelines
LIU Jie1,2, GAO Chenpeng1, YANG Yunan1,2,3,*, CHENG Wangrun1, WANG Tiansheng1, MO Chenglin1, LI Guoyang1, GUO Shiwen1
1 Three Gorges University Key Laboratory of Geological Hazards in Three Gorges Reservoir Area, Ministry of Education, Yichang 443002, Hubei, China 2 Hubei Geological Disaster Prevention Engineering Technology Research Center, China Three Gorges University, Yichang 443002, Hubei, China 3 Badong National Observation and Research Station of Geohazards, China University of Geosciences, Wuhan 430074, China
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.
刘杰, 高晨鹏, 杨渝南, 程王润, 王天生, 莫承林, 李国阳, 国世文. 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[J]. 材料导报, 2026, 40(7): 25040119-9.
LIU Jie, GAO Chenpeng, YANG Yunan, CHENG Wangrun, WANG Tiansheng, MO Chenglin, LI Guoyang, GUO Shiwen. Mechanism Study on the Diffusion and Sealing of Magnetic Slurry-Sodium Silicate Binary Grouting for Fracture Water Inrush in Tunnel Pipelines. Materials Reports, 2026, 40(7): 25040119-9.
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2026, Vol. 40 
