Novel rapid measurement system of undisturbed soils water characteristics curve utilizing the continuous pressurization method
Novel rapid measurement system of undisturbed soils water characteristics curve utilizing the continuous pressurization method
复制标题
新型连续加压法原状土水特性曲线快速测量系统
DOI：
10.1051/e3sconf/20199207008
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发表时间：
2019
影响因子：
--
通讯作者：
Shuu Kyono
中科院分区：
文献类型：
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作者：
Adel Alowaisy;N. Yasufuku;R. Ishikura;M. Hatakeyama;Shuu Kyono
通过本文，开发了一种采用连续加压方法的采样方法和新型全自动系统，能够在很短的时间内确定重塑样品和原状样品的土壤水特征曲线（SWCC）。通过将使用开发的系统获得的标准测试土壤的 SWCC 与使用传统方法获得的 SWCC 进行比较，对所提出的系统进行了验证。对改造后的未扰动的天然土样进行了测试，讨论了扰动对所得SWCC的影响程度。此外，还研究了含有模具材料的未扰动样品对获得的 SWCC 的影响。结果发现，重塑样品不能正确代表原位条件，误差较大，在进行分析和提出针对非饱和土相关地质灾害的对策时应仔细考虑。另外，容纳模具的材料对所得SWCC的影响较小，可以忽略不计。最后得出结论：所开发的原状土壤水特征曲线获取系统直接、快速、可靠、简单。此外，所提出的原状采样和测试方法可用于准确评估 SWCC 的空间变化，无论土壤剖面的异质性如何。
Through this paper, a sampling methodology and a novel full automatic system adopting the continuous pressurization method which is capable of determining the Soil Water Characteristics Curve (SWCC) for both remoulded and undisturbed samples in a very short time were developed. The proposed system was validated by comparing the SWCCs of standard testing soils obtained using the developed system to the SWCCs obtained using a conventional method. Remoulded and undisturbed natural soil samples were tested, where the degree of disturbance influence on the obtained SWCC was discussed. In addition, the undisturbed samples containing moulds material influence on the obtained SWCC was investigated. It was found that remoulded samples do not properly represent the in-situ conditions with significant error that should be carefully considered when conducting analysis and proposing countermeasures against unsaturated soils related Geo-disasters. In addition, the material which the containing mould is made from has minor influence on the obtained SWCC which can be neglected. Finally, it can be concluded that the developed undisturbed soil water characteristics curve obtaining system is direct, rapid, reliable and simple. In addition, the proposed undisturbed sampling and testing methodology can be used to accurately evaluate the spatial variations of the SWCC regardless the heterogeneity of the soil profile.