How geo-synthetic reinforcement supports piled embankment: a numerical approach

抄録

In this study, the 3-dimensional piled embankment reinforced by geo-synthetics models have been developed to observe the difference geo-synthetic-supporting mechanism according to the changes of the spacing and number of the layers. The maximum tensile forces in the geo-synthetics and vertical stress distribution on the soft ground are obtained in each case to compare. When the spacing is increased, the maximum tensile forces transferred through the upper and lower layers become unbalanced. Until the spacing is 20 cm, the greater tensile force acts on the upper layer. If the spacing is increased from 20 cm to 30 cm, the tensile force in the upper layer is sharply decreased. It means the upper geo-synthetic would not receive the vertical stress sufficiently when the upper geo-synthetic placed on the unsuitable position. If the number of geo-synthetic layers are increased, the average tensile force is decreased. The number of geo-synthetics is more than the 4 layers, the imbalance of tensile forces in the each of geo-synthetics are significantly reduced and equalized.