An analytical calculation model to describe the length and width of a fracture dring fracture grouting has been developed. Aim of the model is to have a first indication on what limits length of a fracture and determines its width. Analysis of Fracture Grouting works in practice showed that in reality very complicated shape of a fracture in sand can be simplified by a tube as a first approximation, The model includes the influence of friction and bleeding of propagating grout. Quantification of those processes resulted in a model that has been used to study alternative grout compositions during Fracture Grouting in sand. It was concluded that the grouting efficeincy in sand can be improved by decreasing the yield stress of the grout or increasing its permeability.
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