宾汉姆流体柱-半球形渗透注浆形式扩散参数的研究

Study on Diffusion Parameters of Bingham Fluid Based on Column-hemispherical Penetration Grouting

采用理论分析与试验研究等方法,以宾汉姆流体流变方程及渗流运动方程为基础,研究了宾汉姆流体柱—半球形渗透注浆形式的半球体部分扩散半径及柱体部分扩散高度的理论计算公式;分析了宾汉姆流体流变性、注浆压力、地下水压力及注浆管半径对柱-半球形渗透注浆形式的半球体部分扩散半径及柱体部分扩散高度的影响;并设计注浆试验对其进行验证。结果表明,由宾汉姆流体柱-半球形渗透注浆形式的半球体部分扩散半径及柱体部分扩散高度理论公式计算出的半球体部分扩散半径及柱体部分扩散高度理论值与注浆试验的实测值间有25%~30%范围内的差异,处于可接受误差的范围内。因此,研究成果可为实际注浆施工提供理论支撑与指导作用。

Based on the rheological equation and seepage motion equation of Bingham fluid,a formula of diffusion radius of hemispheroid was deduced. Relationships among some grouting factors were analyzed and validated by means of designing grouting verifying experiments. Experiment results showed theoretical diffusion radius of hemispheroid have about 25% ~ 30% of the differences with the actual measurement diffusion radius by grouting experiments,but they are all within the acceptable error limits.