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<p>A dependable method for improving soil strength, lowering settlement, and raising bearing capacity is the use of sand compaction piles, or SCPs. Through a thorough subsoil investigation before and after SCPs, field settlement data collection, detailed laboratory testing, and numerical simulations, the current study assesses how well SCP strengthens fragile soil layers beneath a 3.25&#xa0;km long road embankment in a reclaimed area of Dhaka city, Bangladesh. SCPs with 300&#xa0;mm diameter were positioned in a triangle grid 1.10&#xa0;m center to center. Tests conducted before and after installation evaluated the effects on soil characteristics, such as moisture content, percentage of sand content, shear strength, allowable bearing capacity, and SPT-N values etc. The findings show that the soil stability has significantly improved. In weak clay layers, post-SCP SPT-N values dramatically rose, indicating improved load-bearing capacity. The angle of internal friction also increased, indicating an improvement in shear strength. Better drainage and densification were confirmed by the decreased moisture level. The permissible bearing capacity also increased significantly. These results demonstrate that SCP is a workable solution for geotechnical issues in soft soil regions since it stabilizes weak soils, lowers settlement risks, and improves overall foundation performance.</p>

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Performance Assessment of a Road Embankment Using Sand Compaction Pile in Jolshiri Area of Dhaka, Bangladesh

  • 期刊论文

  • 发表日期：

    2025年9月23日

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  • Ahmed Abrar Yakiny,
  • Mahabub Sadiq,
  • Paromita Ray,
  • Mehedi Ahmed Ansary Ansary

摘要

A dependable method for improving soil strength, lowering settlement, and raising bearing capacity is the use of sand compaction piles, or SCPs. Through a thorough subsoil investigation before and after SCPs, field settlement data collection, detailed laboratory testing, and numerical simulations, the current study assesses how well SCP strengthens fragile soil layers beneath a 3.25 km long road embankment in a reclaimed area of Dhaka city, Bangladesh. SCPs with 300 mm diameter were positioned in a triangle grid 1.10 m center to center. Tests conducted before and after installation evaluated the effects on soil characteristics, such as moisture content, percentage of sand content, shear strength, allowable bearing capacity, and SPT-N values etc. The findings show that the soil stability has significantly improved. In weak clay layers, post-SCP SPT-N values dramatically rose, indicating improved load-bearing capacity. The angle of internal friction also increased, indicating an improvement in shear strength. Better drainage and densification were confirmed by the decreased moisture level. The permissible bearing capacity also increased significantly. These results demonstrate that SCP is a workable solution for geotechnical issues in soft soil regions since it stabilizes weak soils, lowers settlement risks, and improves overall foundation performance.