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<p>In East Midnapore, West Bengal, India, near Saulat Bridge and the Pithchaboni canal, a project was undertaken to stabilize weak foundation soil and prevent failure by constructing a Reinforced Earth (RE) embankment. This embankment, located adjacent to an earthen dyke, utilizes coarse sand placed over marine soil deposit characterized by a cohesion of 21.83 kN/m<sup>2</sup> and a liquid limit of 74%. Prefabricated Vertical Drains (PVD) were installed at 1&#xa0;m spacing to enhance drainage and accelerate consolidation. The construction has been carried out in phases to achieve 90% consolidation before making further progress. Advanced constitutive models, such as soft soil in PLAXIS 3D, simulate the RE Embankment's behavior. These simulations are then validated against in-situ data to ensure stability under static conditions. Recognizing the limitations of traditional limit equilibrium methods under seismic conditions, this work utilizes PLAXIS 2D to perform precise dynamic analyses under a synthetic earthquake, enhancing slope stability predictions during seismic events.</p>

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Numerical Analysis of Reinforced Earth (RE) Embankment on Soft Marine Deposit Under Earthquake Loading

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Kaustav Das,
  • Sunanda Bhattacharjee,
  • Sourav Pal,
  • Kaushik Bandyopadhyay

摘要

In East Midnapore, West Bengal, India, near Saulat Bridge and the Pithchaboni canal, a project was undertaken to stabilize weak foundation soil and prevent failure by constructing a Reinforced Earth (RE) embankment. This embankment, located adjacent to an earthen dyke, utilizes coarse sand placed over marine soil deposit characterized by a cohesion of 21.83 kN/m2 and a liquid limit of 74%. Prefabricated Vertical Drains (PVD) were installed at 1 m spacing to enhance drainage and accelerate consolidation. The construction has been carried out in phases to achieve 90% consolidation before making further progress. Advanced constitutive models, such as soft soil in PLAXIS 3D, simulate the RE Embankment's behavior. These simulations are then validated against in-situ data to ensure stability under static conditions. Recognizing the limitations of traditional limit equilibrium methods under seismic conditions, this work utilizes PLAXIS 2D to perform precise dynamic analyses under a synthetic earthquake, enhancing slope stability predictions during seismic events.