幂律型流体柱形渗透注浆机制

为进一步完善与丰富幂律型流体的渗透注浆理论,探讨了幂律型流体的柱形渗透注浆机制.采用理论分析与实验研究等方法,以幂律型流体流变方程及渗流运动方程为基础,推导了幂律型流体柱形渗透注浆扩散机制;分析它的适用范围及参数确定方法,并设计室内注浆试验对其进行验证.结果表明:实际测量计算的幂律型流体在被注砾(砂)石体中的等效扩散半径值与由幂律型流体柱形渗透注浆扩散机理公式计算出的扩散半径理论值间虽有30%35%的差异,但都处于可接受误差范围内.幂律型流体柱形渗透注浆扩散机理在整体上能较好地反映幂律型流体在被注介质中的柱形注浆渗透扩散规律,可为实际注浆施工提供理论支撑与指导作用.

Column penetration grouting mechanism researches based on Power-law fluid

In order to further improve and enrich penetration grouting theories of power-law fluid, its column penetration grouting mechanism is researched. According to combining with the rheological equation and seepage motion equation of power-law fluid, carrying out theoretical analysis and experimental,column penetration grouting mechanism based on power-law fluid is deduced. Scope of application and method to determine the parameters are analyzed respectively. Then they are validated by means of designing grouting verifying experiments. Research results show that equivalent diffusion radius of actual measurement values in the indoor grouting experiments have about 30%-35% differences with that of theoretical values calculated by column penetration grouting mechanism based on power-law fluid, but they are all within the acceptable error limits. Therefore, it may have good indication to column penetration grouting diffusion laws of power-law fluid in the injected medium, so research achievements may not only can provide theoretical basis for perfecting the penetration grouting mechanism, but also play a reference guiding role for design and construction on grouting technique.