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Gina Cynthia R. Hasibuan
Universitas Sumatera Utara, Indonesia
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Neuroscience Social Sciences

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Analisis Proses Konsolidasi Dengan PVD Pada Proyek Reklamasi di Samping Tangki CPO Antar Pulau Belawan Berdasarkan Bore Log BH-1 Amirah Hanun; Roesyanto; Gina Cynthia R. Hasibuan
Jurnal Syntax Admiration Vol. 4 No. 8 (2023): Jurnal Syntax Admiration
Publisher : Syntax Corporation Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/jsa.v4i8.680

Abstract

In the planning of civil building, construction problems are often encountered in soft soil types, including low soil carrying capacity and large settlements (settlements) when given a load. Soil improvement is needed to speed up the consolidation settlement time. One method that can be applied to speed up the consolidation settlement time is to use a pre-fabricated vertical drain (PVD) and this preloading method is able to increase the shear strength of soft soils and remove pore water in the soil. This research aims to determine the magnitude of settlement of soft soil consolidation using the 1-dimensional Terzaghi consolidation formula and analysis using the finite element method with PLAXIS 2D modeling, comparing the results of PLAXIS 2D modeling with actual data, the effect of the smear zone effect on the settlement of soil consolidation in the embankment area and to determine the difference in the decrease in preloading methods combined with PVD and preloading without PVD based on point bore log BH-1. From the results of the analysis, it is found that the consolidation settlement by analytical method using the 1-dimensional Terzaghi consolidation formula was 0.858 meters. The amount of settlement that occurs in the consolidation process using PLAXIS 2D modeling taking into account the smear zone effect is 0.786 meters and 0.852 meters without taking into account the smear zone effect. Meanwhile, the actual settlement that occurred in the field based on settlement plate (SP-01) was 0.867 meters and the magnitude of the preloading settlement without PVD was 0.512 meters. It can be concluded that the PVD combination preloading method is proven to accelerate consolidation time, while the improvement with the preloading method alone produces a relatively small decrease.
Study of Risk Mitigation Strategies in the PPP Flyover Project Sitinjau Lauik 1 (Bina Marga – PT. Hutama Panorama Sitinjau Lauik) Suci Yolanda; Gina Cynthia R. Hasibuan; M. Ridwan Anas
Eduvest - Journal of Universal Studies Vol. 6 No. 4 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i4.53048

Abstract

Infrastructure projects implemented under the Public–Private Partnership (PPP) scheme have a high level of risk complexity due to the long-term division of technical, operational, and occupational safety responsibilities. The Sitinjau Lauik 1 Flyover project is characterized by extreme topography, landslide potential, and heavy equipment mobilization, all of which increase the likelihood of construction and occupational safety risks. This study aims to analyze the influence of risk mitigation strategies on construction risk control in PPP projects. The research method employs a descriptive quantitative approach based on the frameworks of ISO 31000 and SMK3, as well as Failure Mode and Effects Analysis (FMEA), using severity, occurrence, and detection parameters to obtain the Risk Priority Number (RPN). The results indicate that there are 31 primary risks, with the highest priority levels originating from technical aspects in the field, such as heavy equipment accidents, potential landslides, inconsistencies in construction methods, and risks associated with working at elevation. The mitigation strategies implemented—including improvements in work methods, periodic inspections, enhancement of workforce competence, and strengthening of the supervision system—have been proven to reduce risk levels from high to medium and low categories. The study concludes that the systematic implementation of risk mitigation strategies has a significant effect on reducing construction risk levels and improving the safety and performance of PPP projects.
Co-Authors Amirah Hanun M. Ridwan Anas Roesyanto Suci Yolanda