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速凝类浆液的双液混合注浆方式及其黏度时变特性导致浆液扩散区内黏度空间分布不均匀。基于此,认为速凝类浆液流型为具有黏度时变性的宾汉流体,研究其在静水条件下水平裂隙中的注浆扩散过程,建立恒定注浆速率条件下考虑浆液黏度时空变化的水平裂隙注浆扩散理论模型,推导浆液扩散区内的黏度及压力时空分布方程,进而得到注浆压力与注浆时间及浆液扩散半径的关系。通过与不考虑黏度空间不均匀性所得结果进行比较,说明考虑黏度空间不均匀的必要性。通过在数值计算模型中预定义黏度空间分布函数,实现了考虑黏度空间分布不均匀性的裂隙注浆数值模拟。通过理论分析、数值模拟与试验结果三者的对比,验证理论分析及数值模拟的合理性,以期为实际注浆工程中注浆参数的确定提供一定借鉴。
The double liquid mixing grouting method and its viscosity time-dependent properties in the quick-setting slurry lead to the uneven spatial distribution of viscosity in the slurry diffusion zone. Based on this, it is considered that the flow pattern of fast-setting slurry is Bingham fluid denatured with viscosity, and the grouting diffusion process in horizontal fractures under static water conditions is studied. The horizontal fractures taking space-time variation of slurry viscosity into account are established under constant grouting rate Grouting diffusion theory model, derived viscosity and pressure distribution in the slurry diffusion zone spatio-temporal distribution equation, and then get the grouting pressure and grouting time and the relationship between the diffusion radius of the slurry. By comparing with the results obtained without considering the spatial heterogeneity of viscosity, the necessity of considering the non-uniform viscosity space is illustrated. By pre-defining the spatial distribution function of viscosity in the numerical calculation model, the numerical simulation of fracture grouting considering the inhomogeneous distribution of viscosity is realized. Through the comparison of theoretical analysis, numerical simulation and experimental results, the theoretical analysis and the rationality of numerical simulation are validated, so as to provide reference for the determination of grouting parameters in actual grouting engineering.