Abstract: The paper deduces two kinds of permeation grouting model including plane radial flow and ball-type centripetal flow based on mechanics of seepage flow.Then the formula of this paper compares with Maag's formula based on engineering example.The computation results preliminarily show that diffusion time of Maag's formula is less than the practical time and the formula of this paper is more accordant with reality.Finally the influence of diffusion radius on grouting parameters is discussed.The results show that diffusion radius is sensitive to grouting parameters and the analytical results used by Maag's formula are basically keeping with those used by the formula of this paper .

Key words: permeation grouting , capillary force, mechanics of seepage flow, diffusion radius

摘要： 本文在现有渗透性注浆理论基础上,考虑毛细力情况下,运用渗流力学对平面径向流、球形向心流两种渗透性注浆模型进行了推导,得到了球形和柱形渗透性注浆扩散公式.并以球形扩散公式为例,结合工程实例和现有常用的Maag球形扩散公式比较,从结果可初步推断:由Maag公式计算注浆所需时间偏小,本文所推导公式相对Maag公式更接近工程实际.最后对注浆参数对扩散半径的影响进行探讨,得到扩散半径对注浆参数的变化均较敏感,采用Maag公式和本文公式得出的趋势基本一致.

关键词: 渗透注浆, 毛细力, 渗流力学, 扩散半径