TY - JOUR
T1 - Estimation of the wetting scanning curves for sandy soils
AU - Zhai, Qian
AU - Rahardjo, Harianto
AU - Satyanaga, Alfrendo
AU - Dai, Guoliang
AU - Du, Yanjun
N1 - Funding Information:
The first and fourth authors would like to acknowledge the financial supports he received from the National Natural Science Foundation of China (No. 51878160 ), the Key Technologies Research and Development Program of China (No. 2017YFC00703408 ) and the Research Funding from China Huaneng Group Co. Ltd ( HNKJ19-H17 ).
Publisher Copyright:
© 2020 Elsevier B.V.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/7
Y1 - 2020/7
N2 - It is known that the soil-water characteristic curve (SWCC) of unsaturated soils is hysteretic. The engineering properties of unsaturated soils during the drying process are different from those during the wetting process, and the difference can be related to the hysteresis of the SWCC. Therefore, understanding the hysteresis of the SWCC is crucial in engineering practices. In this paper, both the “rain-drop” and “ink-bottle” effects on the hysteresis of the SWCC are quantified with mathematical equations. In the proposed equations, it is assumed that soil volume changes during the drying and wetting processes are negligible, which is a reasonable assumption for most sandy soils. Based on the proposed theory, the wetting scanning curves were estimated from the main drying curves. The results from the method proposed in this paper have been compared with experimental data from the published literature. Satisfactory agreements were found between the measured and estimated wetting scanning curves. Consequently, the method for estimating the wetting scanning curves from the fitting parameters of the SWCC by using the equations proposed in this paper is recommended.
AB - It is known that the soil-water characteristic curve (SWCC) of unsaturated soils is hysteretic. The engineering properties of unsaturated soils during the drying process are different from those during the wetting process, and the difference can be related to the hysteresis of the SWCC. Therefore, understanding the hysteresis of the SWCC is crucial in engineering practices. In this paper, both the “rain-drop” and “ink-bottle” effects on the hysteresis of the SWCC are quantified with mathematical equations. In the proposed equations, it is assumed that soil volume changes during the drying and wetting processes are negligible, which is a reasonable assumption for most sandy soils. Based on the proposed theory, the wetting scanning curves were estimated from the main drying curves. The results from the method proposed in this paper have been compared with experimental data from the published literature. Satisfactory agreements were found between the measured and estimated wetting scanning curves. Consequently, the method for estimating the wetting scanning curves from the fitting parameters of the SWCC by using the equations proposed in this paper is recommended.
KW - Hysteresis
KW - Wetting scanning curves
KW - “Ink-bottle” effect
KW - “Rain-drop” effect
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U2 - 10.1016/j.enggeo.2020.105635
DO - 10.1016/j.enggeo.2020.105635
M3 - Article
AN - SCOPUS:85083302027
VL - 272
JO - Engineering Geology
JF - Engineering Geology
SN - 0013-7952
M1 - 105635
ER -