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Grout diffusion model for single fractures in rock considering influences of grouting pressure and filling rate
Tunnelling and Underground Space Technology ( IF 6.7 ) Pub Date : 2025-01-14 , DOI: 10.1016/j.tust.2025.106392
Wenqi Ding, Bo Lei, Chao Duan, Qingzhao Zhang
Tunnelling and Underground Space Technology ( IF 6.7 ) Pub Date : 2025-01-14 , DOI: 10.1016/j.tust.2025.106392
Wenqi Ding, Bo Lei, Chao Duan, Qingzhao Zhang
The processes and effects of grout diffusion in rock fractures are influenced by the grouting parameters, fracture parameters, and external environment. This paper investigates the effects of the grouting pressure and filling rate on grout diffusion based on a theoretical model of Binghamian flow type grout diffusion in a single rough fracture under constant pressure control conditions, using a self-developed grout diffusion visualization test device for a single rough fracture. New concepts of “fully reinforced” and “semi-reinforced” zones are proposed based on the morphology of the slurry diffusion peaks and the significance of the grouting reinforcement. The theoretical model is modified by introducing experimental correction coefficients to account for the differences between the theoretical and experimental values under different grouting pressures and filling rates. When the filling rate is greater than a certain degree, the diffusion model changes from a smooth flat fracture to porous media, revealing a new model of “permeable” grout diffusion under the influence of a filler and suggesting the Forchheimer permeability equation for Binghamian flow type slurries in filled fractures.
中文翻译:
考虑注浆压力和填充速率影响的岩石中单个裂缝的灌浆扩散模型
岩石裂隙中浆液扩散的过程和影响受注浆参数、裂缝参数和外部环境的影响。本文基于恒压控制条件下单个粗裂缝中Binhamian流式浆液扩散的理论模型,使用自主研发的单个粗裂缝灌浆扩散可视化测试装置,研究了注浆压力和填充速率对浆液扩散的影响。根据浆料扩散峰的形态和注浆加固的意义,提出了“全增强”和“半增强”区的新概念。通过引入实验修正系数对理论模型进行修改,以解释不同注浆压力和填充速率下理论值和实验值的差异。当填充速率大于一定程度时,扩散模型从光滑平坦的裂缝转变为多孔介质,揭示了填充物影响下“可渗透”灌浆扩散的新模型,并提出了填充裂缝中 Binghamian 流型浆液的 Forchheimer 渗透率方程。
更新日期:2025-01-14
中文翻译:
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考虑注浆压力和填充速率影响的岩石中单个裂缝的灌浆扩散模型
岩石裂隙中浆液扩散的过程和影响受注浆参数、裂缝参数和外部环境的影响。本文基于恒压控制条件下单个粗裂缝中Binhamian流式浆液扩散的理论模型,使用自主研发的单个粗裂缝灌浆扩散可视化测试装置,研究了注浆压力和填充速率对浆液扩散的影响。根据浆料扩散峰的形态和注浆加固的意义,提出了“全增强”和“半增强”区的新概念。通过引入实验修正系数对理论模型进行修改,以解释不同注浆压力和填充速率下理论值和实验值的差异。当填充速率大于一定程度时,扩散模型从光滑平坦的裂缝转变为多孔介质,揭示了填充物影响下“可渗透”灌浆扩散的新模型,并提出了填充裂缝中 Binghamian 流型浆液的 Forchheimer 渗透率方程。