Ground Improvement Design Using Prefabricated Vertical Drains at the Container Yard Area of Sunda Kelapa Port, Jakarta
DOI:
https://doi.org/10.56904/j-gers.v3i1.83Keywords:
Prefabricated Vertical Drain, Consolidation, Vacuum preloading, Soft clay, Ground ImprovementAbstract
This study investigates the application of Prefabricated Vertical Drains (PVDs) as a ground improvement technique in the Container Yard Area of Sunda Kelapa Port, Jakarta. The site is underlain by thick, soft clay deposits with low shear strength and high compressibility, posing significant risks of settlement under structural loads. The objective of the study is to evaluate the effectiveness of PVD installation at varying depths such as 1/3, 2/3, and full depth of the soft soil layer on consolidation performance and total settlement. The methodology involved site investigation, stratigraphic profiling, and technical calculations based on geotechnical parameters from three designated zones. Settlement outcomes were analyzed for each depth scenario. Results indicate that full-depth PVD installation consistently produced the highest settlement, with maximum values reaching 3.13 meters, demonstrating its superiority in facilitating consolidation across the entire compressible layer. Shallower PVD installations at 1/3 and 2/3 depths resulted in lower settlement values of 1.92 m and 2.64 m respectively, indicating that untreated deeper layers hinder full consolidation. In contrast, full-depth PVDs (34 m) achieved the highest settlement at 3.13 m within 25 weeks, demonstrating their superior effectiveness in accelerating consolidation. The integration of vacuum consolidation further reduced the consolidation time and improved dissipation of excess pore water pressure. These quantitative results confirm that full-depth PVDs, with optimal spacing of 0.862 m, provide a practical and efficient solution for ground improvement, enhancing long-term stability and performance in soft soil infrastructure projects.
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