Slope stability analysis using sheet pile reinforcement with the Bishop method

Abstract

Slope is a sloping ground surface, and forms a certain angle to a horizontal plane and is unprotected. With non-horizontal soil conditions, a component of gravity will tend to move the ground down, so that landslides cannot longer be avoided. The location of this research is located at 150 KV substation, Payabungan. The selection of sheet piles as an alternative treatment is expected to minimize the occurrence of landslides at the substation, where if there is landslide at that location will have an impact on the power outages that will disrupt the activities of residents around. This research was conducted with Bishop's analytical method, aiming to determine the safety factor of the slope before and after reinforcement. In this analysis, sheet pile reinforcement is done with three conditions. From the calculations obtained the value of the safety factor using the Bishop method obtained by 1.11. The value of the safety factor under conditions 1, 2 and 3 was 1.45; 1.50; 1.58. From this study, it was concluded that adding sheet pile as reinforcement would increase the value of the safety factor in order for the slope to be stable compared to the slope without any reinforcement.