Evaluation of the effect of shape and loading position on the stability of geotextile-reinforced slope using centrifuge modeling

Geosynthetic reinforced soil is recognized as one of the fastest and most economical ways to slopes and retaining walls. In this research, using centrifugal modeling, the behavior of soil walls reinforced with relatively high height and slope geotextiles (1H : 5V) under the influence of surcharge was evaluated. For this purpose, 3 models of reinforced soil slope with a height of 35 cm with a scale of 1:30 and an unreinforced soil slope were made and loaded on the centrifuge during acceleration of 30 g. The results showed that the bearing capacity of the foundations on the reinforced soil slope was directly related to the shape of the foundations and for the same widths as the square shape changed to the strip type (increasing the length of the foundations) from the final load will be reduced. Through the investigation of soil reinforcing elements at different depths in terms of failure and elongation, it was revealed that regarding the elongation and failure of geotextiles and the depth of failure for footings with equal widths the maximum value is associated with strip footing and the minimum value is associated with square footing.