Consolidation Analysis Using Prefabricated Vertical Drain (PVD) and Preloading in the Phase I Belawan Reclamation Project with PLAXIS 2D and 3D

Geotechnical experts play an important role in an infrastructure development plan in soil investigations and also in determining the condition of the soil in the phase I Belawan reclamation project along with analyzing soil mechanics, knowing the soil condition and the strength of the soil pavement layer at the port is essential for minimizing the occurrence of failures in the implementation of stockpiling in the Belawan reclamation project. This paper aims to analyze and compare the amount of consolidation settlement analytically using the Terzaghi 1 Dimension method, with the finite element method with modeling in PLAXIS 2D and 3D using coarse, very coarse, medium, fine, and very fine types with data settlement plate (S47) in the field and Analyze and compare the amount of consolidation settlement with the PLAXIS 2D and 3D finite element method with several types of fineness of the mesh with data settlement plate (S47) in the field. The amount of consolidation settlement using the analytical method using the 1-dimensional Terzaghi consolidation formula obtained a decrease of 7,012 m. The consolidation settlement with each mesh type using PLAXIS 2D obtained the following settlement data: very coarse = 7,114 m, coarse = 7,114 m, medium = 6,994 m, fine = 6,976 m, and very fine = 6,892 m. for PLAXIS 3D, very coarse = 5,682 m, coarse = 7,769 m, medium = 6,456 m, fine = 6,659 m, very fine = 6,938 m. The magnitude of the decrease that occurred in the field using the Settlement plate (S47) was 6,942 m.