DESIGN OF SLOPE REINFORCEMENT WITH “REINFORCED GABION” AND “SOIL NAILING”

• Main Author: Borkat
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/44915
• Institution: Institut Teknologi Bandung

The discussion in this final project is about the landslide that occurred on the slope at the side of the access road of mining PT. Freeport, Timika. In addition, also discussed about the landslide prevention. This road is the only access road to the mine site, so it needs to be reinforced so that mining activities run well. Soil data of location very limited, especially for soil parameter data. Due to limited data, it is necessary to use back calculation method to determine soil parameters in accordance with the field conditions by using PLAXIS software and ABAQUS/CAE 6.11. On the back calculation method, the criteria that must be achieved is SF slope value ? 1 and collapse geometry must be same with the original collapse geometry from the contour map. For the prevention of more landslides, needed reinforcement on slopes. Alternative design of slope reinforcement are reinforced gabion and soil nailing. Modeling is done by using software ABAQUS/CAE 6.11 software with elastic plastic soil model and the the Mohr-Coulomb collapse criterion. The stability analysis for reinforced slope is considering the internal and external stability for each of reinforcement with static and seismic condition. Factor of safety for reinforced gabion with static loads is 1,9 and with seismic load is 1,55. Meanwhile, factor of safety factor of soil nailing with static load is 1,93 and with seismic load is 1,61. In the end, reinforcement chosen is the most effective to be applied on the slope, which is reinforced gabion.