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浆液黏度时变性对注浆扩散范围计算值影响很大。基于宾汉体浆液的流变方程与流体黏度时变性方程,建立了黏度时变性宾汉体浆液的流变方程与渗流运动方程,并依据某些假设,推导了时变性宾汉体浆液柱-半球形渗透注浆机制及探讨了半球体部分扩散半径l1与柱体部分扩散长度m的关系:m=(2l1/3)(2n+1)。通过设计室内注浆试验对其进行了验证,结果表明:由黏度时变性宾汉体浆液的柱-半球形渗透机制计算的半球体部分扩散半径、圆柱体部分扩散长度及注浆扩散体体积的理论值与试验测量值虽分别有15%、10%及40%左右的差异,但都处于可接受误差范围内,因而,在总体上能较好地反映黏度时变性宾汉体浆液的柱-半球形注浆渗透规律,对注浆设计、施工和理论研究等方面具有一定的参考价值与指导作用。
The variability of slurry viscosity has a great influence on the calculated value of grouting diffusion. Based on the rheological equation of Bingham slurry and the fluid viscosity time-dependent equation, the rheological equation and seepage equation of the Bingham slurry with time-varying viscosity were established. According to some assumptions, the time-varying Bingham slurry column- The mechanism of the semi-spherical infiltration grouting and the relationship between the diffusion radius l1 of the hemisphere part and the diffusion length m of the cylinder part are discussed: m = (2l1 / 3) (2n + 1). The experimental results show that the diffusion radius of the hemisphere, the diffusion length of the cylinder and the volume of the grouting diffuser are calculated from the column-hemispherical permeation mechanism of the viscosity-denatured Bingham slurry Although the difference between the theoretical value and the experimental value is 15%, 10% and 40%, respectively, they are all within the acceptable error range. Therefore, in general, the column- Hemispherical grouting infiltration law, the grouting design, construction and theoretical research has some reference value and guidance.