DESIGN OF SOIL IMPROVEMENT WITH STONE COLUMN METHOD FOR STOCKYARD AND EMPLACEMENT IN GARONGKONG TRAIN STATION

• Main Author: Jabarudin Nur, Rizal
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/66941
• Institution: Institut Teknologi Bandung

The construction of stockyard and emplacement infrastructure for the Garongkong train station is located in Barru, South Sulawesi. Based on the results of soil data processing, the project location has a dominating soil condition in the form of soft soil and a layer of loose sand. This soil condition can have a negative impact such as the potential for excessive soil settlement, liquefaction, and embankment stability problems, so soil improvement is needed. This final project contains the design of soil improvement using the stone column method to mitigate excess soil settlement, potential liquefaction, and embankment stability at the stockyard and emplacement locations of the Garongkong train station in Zones 2, 3, and 6. The analysis carried out in this final project starts from processing soil data, checking soil settlement, checking potential for liquefaction, checking embankment stability, designed stone column in mitigating excess soil settlement, liquefaction potential and embankment stability. Evaluation of soil settlement and embankment stability was carried out using numerical methods using MIDAS GTS NX axisymmetric and plane strain modeling. In checking the stability of the embankment using the concept of strength reduction method. The initial check of the liquefaction potential using NCEER method (1998) and the mitigation analysis of the liquefaction potential using empirical method from Baez and Martin (1993). Based on the analysis carried out, it was found that Zones 3 and 6 have the potential to experience excessive soil settlement and liquefaction potential, each zone have a safety factor for embankment stability that does not meet the design criteria. Soil improvement using the stone column method can mitigate these potentials with the design configuration used is a square pattern, 2 m spacing, 1 m diameter for Zones 2 and 3 while 1.1 m for Zone 6, 15 m depth for Zones 3 and 6 while 17 m for Zone 2, and 0.6 m LTP thickness for each zone.