GEOTECHNICAL DESIGN OF DUMAI CITY MULTIPURPOSE PORT

• Main Author: Dandy Firmansyah, Akbar
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/69018
• Institution: Institut Teknologi Bandung

The Multipurpose Port of Dumai City consists of seaside and landside facilities with seaside facilities, namely jetty-type piers with three types of piers for each commodity in the hinterland area: general cargo, dry bulk, and liquid bulk. Landside facilities include a cargo storage warehouse, stockpile, storage tank, and road access. On the seaside, geotechnical design is needed for wharf piles and trestles, while on the landside, it is needed for embankments. Piles are designed with steel pipe material (Fy = 240 MPa) with closed ends and are divided into four sizes based on the function of the upper structure (trestle, general cargo, dry bulk, and liquid bulk), taking into account the axial bearing capacity, allowable deflection due to lateral forces using Ensoft LPILE, cross-sectional capacity, and pile settlement. The results of the pile foundation design include a trestle with an outer diameter of 700 mm, a thickness of 120 mm, and a total length of 62 meters; a general cargo dock with an outer diameter of 800 mm, a thickness of 120 mm and a total length of 63.5 meters; dry bulk wharf with an outer diameter of 1000 mm, a thickness of 120 mm and a total length of 60 meters; liquid bulk wharf with an outer diameter of 900 mm, a thickness of 120 mm and a total length of 68 meters. The embankment zone is divided into three zones, including zone 1, which is designated as an access area in and out of the port, zone 2 is intended for landside facilities (general cargo terminal, dry bulk terminal, and liquid bulk terminal), and zone 3 is planned to be a causeway. The design of each embankment zone uses a combination method of pre-loading with prefabricated vertical drain (PVD) and gradual embankment by taking into account the total subsidence of the soil due to elastic settlement and consolidation, the duration of consolidation, and the bearing capacity of the subgrade at each stage of the gradual embankment. The safety evaluation results on embankment slopes using the PLAXIS 2D v20 software are safe, with a minimum safety factor of 1.5 for static service loads and 1.1 for the construction period and pseudo-static loads.