Modeling Geocells as Slope Reinforcement Using the Limit Equilibrium Method

Abstract

Abstract Geocell is a geosynthetic used in foundation works, road construction and slope reinforcement. This research on slope reinforcement with geocells was conducted in a landslide affected area. The case study is a landslide on an access road to a tourist area in East Java, Indonesia, which resulted in almost the entire road body collapsing. In this research, modeling will be carried out using the LEM (Limit Equilibrium method) method with geoslope software to determine the increase in the Safety Factor (SF) value. The results of the slope stability analysis in the condition without reinforcement resulted in an SF value of 0,585. Reinforcement planning was carried out with 3 models at a depth of 9.6 meters and using a 57°slope. Modeling 1, 2, and 3 respectively used geocell sizes with lengths of 1.5 and 4 meters, 1.5 meters and 5 meters, 1.5 meters and 6 meters. The results of the slope stability analysis in modeling 1, 2, and 3 resulted in SF values of 0.783, 0.912, and 1.027, which means that in this study the increase in SF value in direct backfill conditions without reinforcement compared to modeling 1, 2, and 3 was 33.85%, 55.90% and 75.56%.