Liu Shuai, Peng Bo, Liu Jie, Wang Ming Yuan, Li Gang
College of Civil Engineering and Architecture, China Three Gorges University, Yichang, 443002, China.
Key Laboratory of Geological Hazards On Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang, 443002, China.
Sci Rep. 2024 Aug 20;14(1):19246. doi: 10.1038/s41598-024-65852-1.
Among the many adverse geological disasters, the surge water disaster in karst areas causes the greatest loss to underground engineering construction, so it is necessary to carry out relevant research on the management of surge water disaster in karst pipelines. This study presents the creation of an oily epoxy resin magnetic convergence grouting material (OEMS) specifically developed to prevent water infiltration in pipelines. A self-designed visual karst pipeline grouting simulation system was used to conduct an experimental study on the diffusion and plugging behavior of magnetic slurry grouting. A model was constructed to simulate the migration of a magnetic slurry in water inrush circumstances. The model is based on the theory of slurry diffusion and the concept of magnetic adsorption. The results suggest that:(i) The best performance in grouting sealing is achieved when the ratio of new OEMS epoxy resin A liquid to B liquid is 2:1, and the blending ratio of flyash and FeO powder falls between 25 and 55%. (ii) The primary and secondary correlations among the parameters that affect the rate of change in flow rate, plugging pressure, and slurry retention rate are as follows: Hydrodynamic velocity has the greatest correlation, followed by plugging length, FeO power ratio, and flyash mixture ratio. (iii) The validity of the model is verified by comparing empirical observations with calculated theoretical values.
在众多不良地质灾害中，岩溶地区的涌水灾害对地下工程建设造成的损失最大，因此有必要对岩溶管道涌水灾害治理开展相关研究。本研究提出了一种专门为防止管道渗水而研发的油性环氧树脂磁聚合注浆材料（OEMS）。利用自行设计的可视化岩溶管道注浆模拟系统，对磁浆注浆的扩散与封堵行为进行了试验研究。构建了一个模型来模拟磁浆在突水情况下在水中的运移。该模型基于浆液扩散理论和磁吸附概念。结果表明：（i）当新型OEMS环氧树脂A液与B液的比例为2:1，且粉煤灰与FeO粉的混合比例在25%至55%之间时，注浆密封性能最佳。（ii）影响流速变化率、封堵压力和浆液留存率的参数之间的主次相关性如下：水动力速度相关性最大，其次是封堵长度、FeO粉比例和粉煤灰混合比例。（iii）通过将实测值与计算得到的理论值进行比较，验证了模型的有效性。
