On some problems of researches on soil-water retention curve

CHEN Zhenghan; MIAO Qiangqiang; GUO Nan; CHENG Xiang

doi:10.11779/CJGE20220169

Volume 45 Issue 4

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Chinese Journal of Geotechnical Engineering > 2023 > 45(4): 671-679. > DOI: 10.11779/CJGE20220169

CHEN Zhenghan, MIAO Qiangqiang, GUO Nan, CHENG Xiang. On some problems of researches on soil-water retention curve[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(4): 671-679. DOI: 10.11779/CJGE20220169

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On some problems of researches on soil-water retention curve

1.
Department of Military Installation, Army Logistics University, Chongqing 401311, China
2.
College of Civil Engineering, Northwest Minzu University, Lanzhou 730000, China
3.
College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

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Received Date: February 17, 2022
Available Online: April 16, 2023

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Abstract

Abstract

Three problems in the current researches on soil-water retention characteristics are analyzed and discussed, and the following main conclusions are drawn. The soil-water retention characteristics are one of the constitutive relations of unsaturated soils, and they cannot replace other constitutive relations. Exploring the soil-water retention properties with perspectives, theories and methods for studying the constitutive relations can improve the research level. The forms of the soil-water characteristic curve of soils with different types and in different regions are very different, and it is difficult to describe them with the same empirical equation in the existing literatures. The testing method is an effective and reliable way to determine the soil-water characteristic curve. The time required to measure the soil-water retention characteristic curve can be dramatically shortened by improving the suction-measuring technology and the testing method. The actual suction magnitude of filling soil, loess, expansive soil, red clay, etc., which are often encountered in projects, does not exceed 1500 kPa in their working environment. The reasonable suction range, which has a significant effect on deformation and strength of soils, is narrower. So there is no need to spend a long time to obtain the complete soil-water retention characteristic curve for the full suction range.
- soil-water retention curve,
- mechanics role,
- time-saving method to measure SWCC,
- reasonable suction range

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References (42)

References

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