Seyed Amirodin Sadrnejad - Prof. of Civil Engineering Dept., K.N.Toosi University of Technology, Teheran, Iran

The basic phenomenon of grout propagation is tried to be described as a continuous in deformable saturated porous media. The solution of mathematical formulation fluid-displacement results in a highly coupled and non-linear system requires specific numerical techniques. This paper describes a new approach to modeling injecting domain based on a Darcian flow and theory of consolidation. The proposed model utilizes the variation of the coefficient of permeability with respect to the pore fluid pressure based on a Darcian flow characteristic below certain hydraulic gradients. The potential of the proposed model is evaluated in predicting the propagation of grouting due to a single injection bore hole. The general comparison indicates that this approach is capable of solving injection boundary value problem. A simple rule based on the percentage of overlapping two domains affected by two side by side injection bores is led to carry out the effective thickness of insolated cut-off wall. Accordingly, the priority of first injection bore hole and the provided impermeability of corresponding domain and the interaction of the second domain with the previous one have been considered. This simple rule can lead the solution to carry out an average effective thickness of insolated wall upon the proposed model.

Multi-Line, Model, Liquefaction, Earth Dam