“抽注式”注浆法探讨

A preliminary discussion about pumping grouting

目前孔隙性围岩注浆参数大多是根据浅表土的渗透系数确定的，这不适合深层土注浆。本文从注浆压力对浆液扩散影响最显著的特点出发，提出用注浆孔与抽水孔同时工作的方法，这种方法可使浆液水力坡度增大，增加浆液有效扩散半径，提高深表土层注浆效果。

Up to now grouting parameters for the porous surrounding rocks, depended on the penetrating coefficient for shallow surface soil, is unfit for the deep surface soil grouting. Derived from the most outstanding characteristic of the effects which the grouting pressure has on grout diffusibility, this article poses a method, that suggests grouting and pumping are simultaneously applied, this method will be helpful to increase the grouting hydraulic gradient as well as expand the effective grout diffusivity radius and thus strong then the grouting effciency of the deep surface soil.