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All Journal Bandar: Journal of Civil Engineering
Dwi Fortuna, Ellyyni
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Civil Engineering, Building, Construction & Architecture Engineering

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Numerical Investigation of Soft Ground Improvement beneath Road Embankments Using Prefabricated Vertical Drains: Insights from PLAXIS 2D Modeling Miftahulkhair, Muh; Ridhayani, Irma; Okviyani, Nur; Suryani, Herni; Dwi Fortuna, Ellyyni
BANDAR: JOURNAL OF CIVIL ENGINEERING Vol 7 No 2 (2025): Bandar: Journal of Civil Engineering
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/bjce.v7i2.5738

Abstract

Abstract Soft clay deposits often cause excessive settlement and instability in road embankments. This study investigates ground improvement using prefabricated vertical drains under staged embankment loading through finite element modeling in PLAXIS 2D. The analysis examines consolidation rate, settlement, pore water pressure dissipation, and safety performance for square and triangular drain layouts with spacings of 1.25 m and 1.50 m. Results show that vertical drains accelerate consolidation, reducing the time to reach 90 percent settlement from 8.3 years to less than 3 years, while improving overall embankment stability. The triangular 1.25 m configuration produced the most uniform deformation and fastest consolidation response. The study confirms that optimized drain geometry significantly enhances soft ground performance and provides a practical numerical framework for design applications in tropical regions.
Co-Authors Herni Suryani Miftahulkhair, Muh Okviyani, Nur Ridhayani, Irma