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<p>Although many studies have addressed soil reinforcement with geosynthetics, limited work has focused on strip foundations on soil slopes reinforced with wraparound geotextiles. This study investigates the load-settlement behavior of strip footings on a 70° sand slope using small-scale experimental models (1:10 scale). Experiments were conducted with dense, wet-compacted sand and reinforced with three layers of wraparound geotextile. Results indicate that the footing’s bearing capacity increased from 19 kPa (unreinforced) to 90 kPa at a settlement of 20 mm—a 4.7-fold improvement. An optimal reinforcement length of 750 mm (approximately 2.5 times the footing width) was identified; lengths beyond this reduced capacity due to decreased stiffness. Furthermore, increasing the wraparound end length improved performance by only about 45% of the total reinforcement length. These quantitative findings provide clear design guidelines for optimizing strip foundation performance on steep soil slopes using wraparound geotextile reinforcement.</p>

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Behavior of Strip Footing on Wraparound Geotextile-Reinforced Slopes: An Experimental Study

  • 期刊论文

  • 发表日期：

    2025年4月4日

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  • Mehdi Ashtiani,
  • Amirmohammad Zabihpour,
  • Ali Qasemian Sahebi,
  • Amirmohammad Kayhani

摘要

Although many studies have addressed soil reinforcement with geosynthetics, limited work has focused on strip foundations on soil slopes reinforced with wraparound geotextiles. This study investigates the load-settlement behavior of strip footings on a 70° sand slope using small-scale experimental models (1:10 scale). Experiments were conducted with dense, wet-compacted sand and reinforced with three layers of wraparound geotextile. Results indicate that the footing’s bearing capacity increased from 19 kPa (unreinforced) to 90 kPa at a settlement of 20 mm—a 4.7-fold improvement. An optimal reinforcement length of 750 mm (approximately 2.5 times the footing width) was identified; lengths beyond this reduced capacity due to decreased stiffness. Furthermore, increasing the wraparound end length improved performance by only about 45% of the total reinforcement length. These quantitative findings provide clear design guidelines for optimizing strip foundation performance on steep soil slopes using wraparound geotextile reinforcement.