TY - JOUR ID - 3104 TI - 3D Numerical Stability Investigation of Sand Slope Reinforced Using Geogrid Encased Stone Column JO - Amirkabir Journal of Civil Engineering JA - CEEJ LA - en SN - 2588-297X AU - Hajiazizi, Mohammad AU - Nasiri, Masoud AD - Civil Engineering, Razi University, Kermanshah, Iran AD - Razi University Y1 - 2020 PY - 2020 VL - 52 IS - 3 SP - 531 EP - 550 KW - Sandy Slope KW - Stone Column KW - Geogrid KW - Reinforcement KW - Numerical investigation DO - 10.22060/ceej.2018.14678.5718 N2 - One of the efficient ways for reinforcing the earth’s slope is Geogrid Encased Stone Column (GESC). This technique can increase bearing capacity and decrease the settlement rate of the slope. The goal of this study is to perform a three-dimensional finite-difference numerical study on the behavior of GESC in the stabilization of sand slope. According to the results of the three-dimensional finite-difference analysis, the existence of GESC in the middle of the sand slope, as the optimal location for stone column placement, increased stability to an ideal level compared with the ordinary stone column (OSC). Different parameters including stone column diameter, coupling spring cohesion, coupling spring friction, center to center distance of columns (S/D ratio), and the layout of encasements were evaluated and discussed in this paper. The results indicated that the efficient parameter in geogrid is coupling spring cohesion; in which by increasing this parameter, slope bearing capacity increased linearly (i.e. the bearing capacity of slope reinforced using GESC could enhance up to 1.8 times of slope reinforced using OSC). In the case of row stone implementation, the maximum bearing capacity was that of S/D=2. However, a decrease in the S/D ratio did not necessarily increase the bearing capacity of slopes. UR - https://ceej.aut.ac.ir/article_3104.html L1 - https://ceej.aut.ac.ir/article_3104_c8fb4085f6a3bfe72d5e21b9ac188041.pdf ER -