Evaluating of Stability of Soil Slopes that Estabilized with Deep Patch Method

Many roads in forest areas are located along the steep hills. The cut and fill method is currently used for construction of these roads. Settlement or consolidation in not enough compacted soil or creep in down slope، can lead to subsidence and cracks in roads. General methods for solving settlement related problems such as reconstruction، retaining structure and … are expensive. Deep patch method is a low- cost method for increasing the stability of slopes. In this method، the upper parts of the subsided area are excavated and replaced with reinforcement materials such as Geo grid in accordance with compacted soil. In this paper، limit equilibrium method has been implemented for determining the safety factor of a planar slip surface in a slope. Furthermore، graphs for determining safety factor of reinforced soil slope with Geo synthetics have been proposed.