STUDY OF THE BEHAVIOR OF SOIL NAILING REINFORCEMENT IN OPEN CUT ON LINGKAR TIMUR KUNINGAN STREET USING FINITE ELEMENT METHOD

• Main Author: RAHDIANATA, DEDI
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/60912
• Institution: Institut Teknologi Bandung

This research studied the behavior of soil nailing reinforcement on the Lingkar Timur Kuningan Road project using the two-dimensional finite element method. Soil nailing is modeled with a geogrid, anchored, and embedded beam row (EBR) model with a combination of 10, 15, and 20 degrees slope variations downwards in the horizontal plane and a diameter of 10, 15, and 20 cm with a distance between the center to center of the soil nailing in the horizontal direction of 1, 1.5, and 2 m. The excavation construction is carried out in stages and consists of three traps where the first trap is made as high as 10 m with a slope of 1H:2.5V, the second and third traps are each 7.5 m high with a slope of 1H:5V. The geogrid model is commonly used for soil reinforcement analysis with geotextiles with a continuous length into the plane and only has a tensile axial stiffness. While the node to node anchored model can reflect the three-dimensional effect with the horizontal distance between soil nailing being appropriate for the approach to soil nailing reinforcement, because it can only produce tensile and deformation forces and has the same collapse mechanism as soil nailing. The EBR model can be used for soil nailing because this model incorporates threedimensional effects into the two-dimensional analysis, including being able to model the shear dan flexural failure mechanisms that occur in soil nailing. In this study it was found that the moment that occurred on the model of the EBR to a combination of diameter variations are not significantly changed. It was also found that the horizontal distance and diameter of the soil nailing in the geogrid and anchored models did not have a significant effect on the safety factor of global slope stability in contrast to the EBR model. The greater the slope of the soil nailing in the geogrid, anchored, and EBR models, the safety factor increases with a difference of 4% to 6%. The diameter and distance of the nail are directly proportional to the magnitude of the tensile force, while the slope of the nail is inversely proportional to the magnitude of the tensile force.