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<p>This study investigates seismic passive earth pressure on cantilever retaining walls with cohesionless backfill subjected to surcharge loading at the surface of the backfill, using a limit equilibrium approach in association with pseudo-static, pseudo-dynamic, and modified pseudo-dynamic methods. The often-overlooked role of surcharge in passive conditions is addressed, as neglecting it can lead to overdesign and economic inefficiency by underestimating soil resistance. Results show a 25 – 35% increase in the passive earth pressure coefficient as the surcharge coefficient rises from 0 to 0.3. A field application study was carried out to confirm the practical relevance of accounting for surcharge in seismic design. Among the methods, it was observed that the modified pseudo-dynamic approach offers the most sustainable and cost-effective design outcomes.</p>

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Mitigating seismic hazards in earth retaining structures using surcharge imposition

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • M. S. Kishore,
  • G. Santhoshkumar,
  • Viswanath Parol

摘要

This study investigates seismic passive earth pressure on cantilever retaining walls with cohesionless backfill subjected to surcharge loading at the surface of the backfill, using a limit equilibrium approach in association with pseudo-static, pseudo-dynamic, and modified pseudo-dynamic methods. The often-overlooked role of surcharge in passive conditions is addressed, as neglecting it can lead to overdesign and economic inefficiency by underestimating soil resistance. Results show a 25 – 35% increase in the passive earth pressure coefficient as the surcharge coefficient rises from 0 to 0.3. A field application study was carried out to confirm the practical relevance of accounting for surcharge in seismic design. Among the methods, it was observed that the modified pseudo-dynamic approach offers the most sustainable and cost-effective design outcomes.