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<p>The present study experimentally modeled the behavior of a strip footing over a single void on sandy soil that had been reinforced with reduced-scale geosynthetic reinforcements. The relative soil density and the number and configuration of the reinforcement layers were among the variables examined. The critical slip surfaces and types of failure beneath the footing were observed using particle image velocimetry (PIV). The effectiveness of geosynthetic reinforcement was evaluated using three performance indicators: IK (increase in subgrade reaction modulus), PDS (rate of reduction in settlement), and IFB (increase in bearing capacity). The outcomes demonstrated that IFB, IK, and PDS increased as the number of reinforcement layers and the relative density of the sandy soil increased. The test with two layers of geocomposite in sandy soil with a relative density of 90% showed the maximum rate of decrease in settlement and IFB at S/B = 20% (ratio of settlement to width of footing) compared to the case without reinforcement were 74.1% and 1.81, respectively. The PIV results showed that shear strain developed along the critical slip surfaces reduced with increasing geosynthetic reinforcing layers and soil density.</p>

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Physical Modeling of the Effect of Geosynthetic Reinforcement Placed Above a Single Void Under Strip Footing

  • 期刊论文

  • 发表日期：

    2025年10月4日

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  • Maryam Yazdi,
  • Michael Kazemzadeh,
  • Amirali Zad,
  • Mohammadreza Shahbazi

摘要

The present study experimentally modeled the behavior of a strip footing over a single void on sandy soil that had been reinforced with reduced-scale geosynthetic reinforcements. The relative soil density and the number and configuration of the reinforcement layers were among the variables examined. The critical slip surfaces and types of failure beneath the footing were observed using particle image velocimetry (PIV). The effectiveness of geosynthetic reinforcement was evaluated using three performance indicators: IK (increase in subgrade reaction modulus), PDS (rate of reduction in settlement), and IFB (increase in bearing capacity). The outcomes demonstrated that IFB, IK, and PDS increased as the number of reinforcement layers and the relative density of the sandy soil increased. The test with two layers of geocomposite in sandy soil with a relative density of 90% showed the maximum rate of decrease in settlement and IFB at S/B = 20% (ratio of settlement to width of footing) compared to the case without reinforcement were 74.1% and 1.81, respectively. The PIV results showed that shear strain developed along the critical slip surfaces reduced with increasing geosynthetic reinforcing layers and soil density.