Numerical modeling for the evaluation of grout penetration in fractured rock masses

摘要

Grouting aims to reduce the permeability of rock mass below the required value and has been widely used in rock engineering field for a long time. However, the injection procedure needs several empirical decision makings and it is rather difficult to reliably confirm the achievement of improvement, because the grout penetration process is not sufficiently clarified. This study proposes a stochastic prediction method of spatial distribution of rock hydraulic properties after grouting in fractured rock mass by using the grout penetration process model. The goal achievement probability under the specific target permeability is computed with the help of geostatistical interpolation method. The applicability of the method is verified through the several field applications.