A study of the soil-water reliability model in the whole matric suction range

LIU Qingling; JIAN Wenbin; XU Xutang; NIE Wen

doi:10.16030/j.cnki.issn.1000-3665.202104033

2022 Vol. 49, No. 1

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Article navigation > Hydrogeology & Engineering Geology > 2022 > 49(1): 92-100

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LIU Qingling, JIAN Wenbin, XU Xutang, NIE Wen. A study of the soil-water reliability model in the whole matric suction range[J]. Hydrogeology & Engineering Geology, 2022, 49(1): 92-100. doi: 10.16030/j.cnki.issn.1000-3665.202104033

Citation:

LIU Qingling, JIAN Wenbin, XU Xutang, NIE Wen. A study of the soil-water reliability model in the whole matric suction range[J]. Hydrogeology & Engineering Geology, 2022, 49(1): 92-100. doi: 10.16030/j.cnki.issn.1000-3665.202104033

A study of the soil-water reliability model in the whole matric suction range

1.
College of Zijin Mining, Fuzhou University, Fuzhou, Fujian　350116, China
2.
College of Enviroment and Resources, Fuzhou University, Fuzhou, Fujian　350116, China
3.
College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian　350116, China
4.
Quanzhou Institute of Equipment Manufacturing, Haixi Institute, Chinese Academy of Sciences, Quanzhou, Fujian　362200, China

More Information

Corresponding author: JIAN Wenbin, jwb@fzu.edu.cn

Received Date: 02 February 2021

Revised Date: 15 April 2021

Publish Date: 15 January 2022

Abstract

Abstract

Soil–water characteristic curves (SWCCs) are considered as a basis for analyzing fluid–solid coupling of unsaturated soil. How to estimate the SWCC over the whole region with matric suction based on the limited local datasets is challenging. Laboratory test is separately carried out on the ranges with low and high matric suctions of the undisturbed residual soil widely distributed in southeast China. With the test data, a model for SWCCs of soil in the whole range with matric suction is established by applying the reliability analysis method. Through analysis and verification based on the test data and data of 52 samples of three types of soil (sand, silt-loam and clay) obtained from UNSODA, it is found that the model parameters involved in the model show significant physics meaning. The model can be used to estimate the SWCC of soil within the whole range with matric suction according to part of the data (in the low or high matric suction part). Compared with the other models, the model is robust and is applicable for acquiring SWCCs of different types of soil within the whole range matric suction with R²>0.98. In addition, the model provides an important method to obtain SWCCs of soils with different texture, and is of the reference significance to the geotechnical AI analysis.
- soil water characteristic curve /
- residual clay /
- matric suction /
- fully matric suction /
- reliability

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References

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