Approach to Rapidly Determining the Water Retention Curves for Fine-Grained Soils in Capillary Regime Based on the NMR Technique

doi:10.1061/(ASCE)EM.1943-7889.0001231

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	Approach to Rapidly Determining the Water Retention Curves for Fine-Grained Soils in Capillary Regime Based on the NMR Technique
	Wei, Changfu 1,2; Chen, Pan 2; Liu, Jie 2; Xue, Wenjiao 3; Tian, Huihui 2
刊名	JOURNAL OF ENGINEERING MECHANICS
	2017
卷号	143 期号:7 页码:-
关键词	Unsaturated soil Soil-water retention curve Nuclear magnetic resonance technique Transverse relaxation times Pore-size distribution Fine-grained soils
ISSN号	0733-9399
DOI	10.1061/(ASCE)EM.1943-7889.0001231
英文摘要	A new procedure is developed for rapidly determining the water retention curves of unsaturated fine-grained soils based on the nuclear magnetic resonance (NMR) technique. From a well-defined pore-size distribution function, a distribution function of NMR transverse relaxation time (T2) is derived for fully-saturated soils, by virtue of the Young-Laplace equation and the linear relationship between pore radius and T2. By fitting the measured T2 distribution curve with the proposed T2 distribution function, the key parameters characterizing the soil-water retention characteristics can be determined. To validate the proposed method, a series of the NMR measurements was performed for two types of fully-saturated fine-grained soils. The proposed procedure is then used to obtain the soil-water retention curves of the tested soils from the NMR measurements; the obtained soil-water retention curves are compared with those determined independently by the pressure-plate method. It is shown that the proposed procedure can be effectively used to determine the soil-water retention curves of fine-grained soils in a capillary regime. Compared to conventional methods, which are generally time-consuming, the proposed procedure can save a significant amount of time in determining the soil-water retention curves. (C) 2017 American Society of Civil Engineers.
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000399896200006
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4083]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Guilin Univ Technol, Guangxi Key Lab Bldg New Energy & Energy Conservi ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.Wuhan Univ Sci & Technol, Dept Civil Engn, City Coll
推荐引用方式 GB/T 7714	Wei, Changfu,Chen, Pan,Liu, Jie,et al. Approach to Rapidly Determining the Water Retention Curves for Fine-Grained Soils in Capillary Regime Based on the NMR Technique[J]. JOURNAL OF ENGINEERING MECHANICS,2017,143(7):-.
APA	Wei, Changfu,Chen, Pan,Liu, Jie,Xue, Wenjiao,&Tian, Huihui.(2017).Approach to Rapidly Determining the Water Retention Curves for Fine-Grained Soils in Capillary Regime Based on the NMR Technique.JOURNAL OF ENGINEERING MECHANICS,143(7),-.
MLA	Wei, Changfu,et al."Approach to Rapidly Determining the Water Retention Curves for Fine-Grained Soils in Capillary Regime Based on the NMR Technique".JOURNAL OF ENGINEERING MECHANICS 143.7(2017):-.