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首页> 外文期刊>Canadian Geotechnical Journal >Estimation of soil suction from the soil-water characteristic curve
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Estimation of soil suction from the soil-water characteristic curve

机译：从土壤水分特征曲线估算土壤吸力

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摘要

Soil-water characteristic curves (SWCCs) are routinely used for the estimation of unsaturated soil property functions (e.g., permeability functions, water storage functions, shear strength functions, and thermal property functions). This paper examines the possibility of using the SWCC for the estimation of in situ soil suction. The paper focuses on the limitations of estimating soil suctions from the SWCC and also suggests a context under which soil suction estimations should be used. The potential range of estimated suction values is known to be large because of hysteresis between drying and wetting SWCCs. For this, and other reasons, the estimation of in situ suctions from the SWCC has been discouraged. However, a framework is suggested in this paper for estimating the median value for in situ soil suction along with a likely range of soil suction values (i.e., maximum and minimum values). The percentage error in the estimation of soil suction from the SWCC is shown to be lowest for sand soils and highest for clay soils.
机译：通常使用土壤-水特征曲线（SWCC）估算非饱和土壤特性函数（例如，渗透性函数，储水函数，抗剪强度函数和热特性函数）。本文探讨了使用SWCC估算原位土壤吸力的可能性。本文着重于从SWCC估算土壤吸力的局限性，并提出了应使用土壤吸力估算的背景。已知的估计吸力值的潜在范围很大，因为在干燥和润湿SWCC之间存在磁滞。由于这个原因和其他原因，不建议估算来自SWCC的原位吸力。但是，本文提出了一个框架来估算原位土壤吸力的中值以及可能的土壤吸力值范围（即最大和最小值）。从SWCC估算土壤吸力时，百分比误差显示出对于沙土最低，而对于粘土土最高。

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