土中へのケミカルグラウトの注入と分布の解析のためのシミュレーションモデル

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A numerical simulation model that explains the permeation and the distribution process of the injected chemical grout solution in soils is developed using the finite element mothod. This model employs the theory of miscible displacement in porous media, and consists of a set of nonlinear partial differential equations, the flow equation and the mass transport equation, which are solved for the pressure head and the concentration of the injected grout solution in soils. The flow equation expresses the transient flow of grout solution in deformable, saturated or unsaturated soil structure, and also considers the effect of density and viscosity variations of the injected grout solution. The transport equation expresses the dilution of grout solution due to dispersion and adsorption of chemicals during the permeation process. In order to solve these equations with the finite element method, the standard Galerkin method and the upstream weighted residual technique were employed for the flow equation and the mass transport equation, respectively. A chemical grouting process of a one-dimensional vertical injection was analyzed using the proposed model. The results of the computation with the programs, developed under this model, was then compared with the experimental results under the same geometrical and hydraulic conditions. These two results fits relatively well, and also supports the validity of this model. The proposed model is supposed to be used as the basic model for the chemical grouting design.
東海大学の論文

土中へのケミカルグラウトの注入と分布の解析のためのシミュレーションモデル

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