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<p>Soil-water characteristic curves (SWCC) and hydraulic conductivity curves (HCC) of compacted loess with different void ratios were measured using the filter paper method and transient seepage tests. For SWCC, we observed a capillary saturation zone, transition zone, and residual zone for each definite void ratio. Degassing suction exhibited a linear positive correlation with void ratio. For HCC, matric suction increased from 10<sup>-2</sup> kPa to 105 kPa, and hydraulic conductivity decreased from 10<sup>-6</sup> m/s to 10<sup>-14</sup> m/s. The results revealed several main findings. When matric suction &lt; 100 kPa, the void ratio exerted a strong influence on SWCC and HCC, and the classical van Genuchten model and Gardner model could be used to describe the shape of these curves. When matric suction ≥ 100 kPa, the void ratio had little effect on SWCC and HCC, and the curves were linear in their respective coordinate systems. Additionally, the results revealed functional relationships between the model parameters and void ratios. After regression processing, uniform formulations of SWCC and HCC were obtained for compacted loess with different pore ratios.</p>

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Measurement and Uniform Formulations of Soil-Water Characteristic Curves and Hydraulic Conductivity Curves for Compacted Loess with Different Void Ratios

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Lin Zhang,
  • Tao Zhao,
  • Hongmei Mao,
  • Tonglu Li,
  • Jiheng Li

摘要

Soil-water characteristic curves (SWCC) and hydraulic conductivity curves (HCC) of compacted loess with different void ratios were measured using the filter paper method and transient seepage tests. For SWCC, we observed a capillary saturation zone, transition zone, and residual zone for each definite void ratio. Degassing suction exhibited a linear positive correlation with void ratio. For HCC, matric suction increased from 10-2 kPa to 105 kPa, and hydraulic conductivity decreased from 10-6 m/s to 10-14 m/s. The results revealed several main findings. When matric suction < 100 kPa, the void ratio exerted a strong influence on SWCC and HCC, and the classical van Genuchten model and Gardner model could be used to describe the shape of these curves. When matric suction ≥ 100 kPa, the void ratio had little effect on SWCC and HCC, and the curves were linear in their respective coordinate systems. Additionally, the results revealed functional relationships between the model parameters and void ratios. After regression processing, uniform formulations of SWCC and HCC were obtained for compacted loess with different pore ratios.