Abstract Natural disasters like earthquakes and heavy rainfall events induce slope failures and other disasters. Proper determination of the water retention properties of porous mediums is necessary. The conventional Soil Water Characteristics Curve (SWCC) determination techniques are limited due to their complexity and lengthy time required. A highly accurate simple remolded and undisturbed samples SWCC determination method that requires a short time is lacking. A novel automatic system which adopts the continuous pressurization method and allows the direct determination of the SWCC in a short time suitable for use with remolded and undisturbed samples was developed. The accuracy of the newly developed system was validated, and it was shown to have excellent repeatability. It is a reliable and direct method that requires a short time for the SWCC determination, with the drying and wetting SWCCs obtainable in less than 10% of the time required using the conventional multi-step flow method. Consideration of the pore water pressure was shown to be necessary when calculating the matric suction utilizing the axis-translation technique. Finally, because remolded samples do not properly represent the in-situ natural conditions, the significant discrepancies should be carefully considered when conducting analysis and proposing countermeasures against unsaturated soil-related Geo-disasters.

中文翻译：

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用于快速测定重塑和未受干扰的无粘性土壤的土壤水分特性曲线的连续加压法

摘要 地震、强降雨等自然灾害引发边坡崩塌等灾害。正确测定多孔介质的保水性能是必要的。传统的土壤水分特性曲线 (SWCC) 确定技术由于其复杂性和所需的时间长而受到限制。目前还缺乏一种精度高、简单、时间短的未扰动样品SWCC测定方法。开发了一种新型自动系统，采用连续加压方法，可以在短时间内直接测定 SWCC，适用于重塑和未受干扰的样品。新开发系统的准确性得到了验证，并显示出具有出色的可重复性。这是一种可靠且直接的方法，需要很短的时间进行 SWCC 测定，干燥和润湿 SWCC 所需的时间不到使用传统多步流动法所需时间的 10%。在使用轴平移技术计算基质吸力时，必须考虑孔隙水压力。最后，由于改造后的样品不能正确代表原位自然条件，因此在对非饱和土壤相关地质灾害进行分析和提出对策时应仔细考虑这些显着差异。在使用轴平移技术计算基质吸力时，必须考虑孔隙水压力。最后，由于改造后的样品不能正确代表原位自然条件，因此在对非饱和土壤相关地质灾害进行分析和提出对策时应仔细考虑这些显着差异。在使用轴平移技术计算基质吸力时，必须考虑孔隙水压力。最后，由于改造后的样品不能正确代表原位自然条件，因此在对非饱和土壤相关地质灾害进行分析和提出对策时应仔细考虑这些显着差异。