Shiraz University Iranian Journal of Science and Technology Transactions of Civil Engineering 2228-6160 30 1 2006 02 24 Discrete element method analysis of retaining wall earth pressure in static and pseudo-static conditions 145 150 770 10.22099/ijstc.2006.770 EN Journal Article 2004 01 01 Static and pseudo-static analysis based on the Discrete Element Method (DEM) is presented for active and passive earth pressure distribution behind a retaining wall. Soil mass in the present model is treated as comprising blocks which are connected by elasto-plastic Winkler- springs. The solution of this method satisfies all equilibrium and compatibility conditions. Examples are shown to demonstrate the applicability of the method for analyses of earth pressure behind a gravity wall, including pseudo-static pressure of earth and lateral pressure of non-homogeneous soil. The applicability of DEM for analyses of reinforced soil structures and the advantages of this method over the conventional limit equilibrium method are also discussed.   Retaining wall discrete element method lateral earth pressure limit equilibrium reinforced soil https://ijstc.shirazu.ac.ir/article_770_fe8fe6912bfa1ff6382dcea38e377b6a.pdf
Shiraz University Iranian Journal of Science and Technology Transactions of Civil Engineering 2228-6160 30 1 2006 02 24 Numerical solution and hydrodynamics of grout propagation in porous media 151 155 771 10.22099/ijstc.2006.771 EN Journal Article 2004 04 12 A new approach to <em>modeling injecting domain</em>has been developed based on changing permeability coefficient in a certain form in theory of consolidation. The proposed model utilizes the variation of the coefficient of permeability with respect to the pore fluid pressure justifying flow characteristic below certain hydraulic gradients and void volume changes. A proposed numerical solution for heterogeneity of media with regards to the permeability coefficient also leads the results to a better grout extension solution. The potential of the proposed model is evaluated in predicting the propagation of grouting material due to a single injection bore hole. The general comparison indicates that this approach is capable of solving the injection boundary value problem.            Grout propagation non-Darcian flow three level scheme hydrodynamic permeability https://ijstc.shirazu.ac.ir/article_771_012d5815888440a07f721b4c4aa7a769.pdf