饱和砂层驱水渗透注浆分析

运用渗流力学理论,对饱和砂层在毛细力作用下的平面径向流、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.以球形扩散公式为例,结合工程实例并与常用的Maag球形扩散公式进行比较,结果表明,由Maag公式计算注浆所需时间偏小,文中公式更接近工程实际.最后探讨了注浆参数对扩散半径的影响,表明扩散半径对注浆参数的变化均较敏感,文中公式与Maag公式所得到的变化趋势基本一致.

Analysis of driving-water permeation grouting of saturated sand seam

The plane radial flow and ball-type centripetal flow permeation grouting models based on mechanics of seepage flow are deduced. Then one of the corresponding formulas in this paper is compared 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, but 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 the diffusion radius is sensitive to the grouting parameters and the results in the use of Maag's formula are basically keeping with those in the use of the formula of this paper.