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<p>This discussion engages with the comprehensive study by Santos-Neta et al. (2025) on rigid inclusions in collapsible soils. While commending their advanced numerical validation, we propose an alternative interpretation for the observed axial load redistribution among inclusions. We argue that the variable head load changes could also likely be driven by the differential hydro-mechanical destructuring of the compacted, cohesive load transfer platform (LTP) upon saturation, a mechanism that is not fully captured by the standard Barcelona Basic Model (BBM). This reinterpretation is supported by recent literature on suction-dependent interface strength and degradation in collapsible loess. A comparative framework is proposed, situating BBM alongside unsaturated load-transfer methods, and offering an approach for foundation design in collapsible ground.</p>

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Discussion of “Physical and numerical investigation of rigid inclusions in collapsible soils” by Santos-Neta et al. 2025 (Doi:10.1007/s11440-025–02808-3)

  • 期刊论文

  • 发表日期：

    2026年7月11日

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  • Bantayehu Uba Uge,
  • Yuancheng Guo,
  • Jun Zhao,
  • Yunlong Liu,
  • Amroayehu Umude Uba,
  • Rediet Emiru Mulatu

摘要

This discussion engages with the comprehensive study by Santos-Neta et al. (2025) on rigid inclusions in collapsible soils. While commending their advanced numerical validation, we propose an alternative interpretation for the observed axial load redistribution among inclusions. We argue that the variable head load changes could also likely be driven by the differential hydro-mechanical destructuring of the compacted, cohesive load transfer platform (LTP) upon saturation, a mechanism that is not fully captured by the standard Barcelona Basic Model (BBM). This reinterpretation is supported by recent literature on suction-dependent interface strength and degradation in collapsible loess. A comparative framework is proposed, situating BBM alongside unsaturated load-transfer methods, and offering an approach for foundation design in collapsible ground.