STUDY OF SOFT SOIL SLOPE REINFORCEMENT BEHAVIOR ON THE MITIGATION OF STRUCTURAL FAILURE DUE TO LATERAL SLOPE MOVEMENT IN EAST KALIMANTAN USING THE FINITE ELEMENT METHOD

• Main Author: ASH SHIDIQQY, FADLLI
• Format: Theses
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/61472
• Institution: Institut Teknologi Bandung

In a project located in East Kalimantan using a pile slab structure built on soft soil and a fairly steep slope. After a few months later, the soil experienced lateral movement, to ensure the movement a monitoring tool in the form of an inclinometer was installed, the results of the inclinometer showed that the movement occurred continuously every day, and caused the pile slab structure to move, it is necessary to strengthen the slopes that can stop the movement of the soil as an effort mitigation. With this condition, it is necessary to handle it efficiently and effectively. Then the handling of bored pile is chosen, which will be analyzed for its behavior and effectiveness in mitigation efforts. To model the field conditions, a back analysis method is used as the initial condition with a safety factor value equal to 1 or called the critical condition, to obtain parameters that are in accordance with field conditions. The modeling is carried out using soil parameters from laboratory and field tests or called soil mechanics data using peak and residual parameter conditions, which will be compared with the movement behavior of the inclinometer, and will be seen from the two parameter conditions which are closer to field conditions. The soil parameters used are parameters that are appropriate and close to the behavior of the soil that occurs in the field. Then identify how big the difference from the soil mechanical parameters. After that, an analysis of the behavior that occurs due to the reinforcement of the soil and its slab structure is carried out, as well as how much resistance it has in receiving static and dynamic loads using pseudostatics as a successful test of the mitigation carried out, and compared with the results of inclinometer monitoring, so that the treatment carried out is verified. Things that will be compared in determining the alternative to be used are lateral deformation and the pattern of movement of the structure that occurs whether it can be reduced properly or not so that the risk of structural collapse is minimized and the value of the safety factor which of course must meet the requirements of more than 1.5 in accordance with SNI -8460 Geotechnical 2017.