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On-line Access: 2021-03-10

Received: 2020-03-30

Revision Accepted: 2020-11-15

Crosschecked: 2021-01-20

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 ORCID:

Xin Liu

https://orcid.org/0000-0002-0161-6806

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Journal of Zhejiang University SCIENCE A 2021 Vol.22 No.3 P.188-194

http://doi.org/10.1631/jzus.A2000121


Unified characterization of hydro-mechanical properties of soil-bentonite mixtures exposed to pore-fluid salinity


Author(s):  Xin Liu, Wen-zhe Zhang, Xiao Wei, Heng-xing Lan

Affiliation(s):  School of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, China; more

Corresponding email(s):   xliu67@chd.edu.cn, lanhx@lreis.ac.cn

Key Words:  Hydro-mechanical property, Soil-bentonite mixture, Pore-fluid salinity


Xin Liu, Wen-zhe Zhang, Xiao Wei, Heng-xing Lan. Unified characterization of hydro-mechanical properties of soil-bentonite mixtures exposed to pore-fluid salinity[J]. Journal of Zhejiang University Science A, 2021, 22(3): 188-194.

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author="Xin Liu, Wen-zhe Zhang, Xiao Wei, Heng-xing Lan",
journal="Journal of Zhejiang University Science A",
volume="22",
number="3",
pages="188-194",
year="2021",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2000121"
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%T Unified characterization of hydro-mechanical properties of soil-bentonite mixtures exposed to pore-fluid salinity
%A Xin Liu
%A Wen-zhe Zhang
%A Xiao Wei
%A Heng-xing Lan
%J Journal of Zhejiang University SCIENCE A
%V 22
%N 3
%P 188-194
%@ 1673-565X
%D 2021
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2000121

TY - JOUR
T1 - Unified characterization of hydro-mechanical properties of soil-bentonite mixtures exposed to pore-fluid salinity
A1 - Xin Liu
A1 - Wen-zhe Zhang
A1 - Xiao Wei
A1 - Heng-xing Lan
J0 - Journal of Zhejiang University Science A
VL - 22
IS - 3
SP - 188
EP - 194
%@ 1673-565X
Y1 - 2021
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2000121


Abstract: 
Knowledge on the impact of pore-fluid salinity, characterized by the changes of pH, ionic concentration, material composition, and other factors, on geotechnical engineering applications involving hydro-chemo-mechanical systems, is expanding. These systems range from conventional geotechnical applications to geo-environmental facilities. A favorable soil of bentonite was often adopted as an admixture in these projects owing to its high swelling and self-sealing capabilities. Among a list of parameters, hydraulic conductivity and undrained shear strength are the most fundamental ones that are closely related to the engineering performance of sealing materials. The characterization of these two parameters for soil-bentonite mixtures, while taking into account the influence of pore-fluid salinity, is therefore a matter of concern at both academic and practical levels.

水盐效应对膨润土混合土力学特性的影响及评估方法研究

目的:揭示水盐效应对膨润土混合土的渗透系数和不排水剪切强度的影响.
创新点:1. 通过核磁及扫描电镜等手段从微观角度解释混合土力学指标的变化规律;2. 建立水盐效应下评估混合土的渗透系数和不排水剪切强度的经验关系式.
方法:1. 通过开展常规渗透试验和十字板剪切试验,揭示混合土力学指标的变化规律;2. 通过微观试验,分析影响力学指标的主要控制因素;3. 通过收集文献数据,验证经验关系式的可行性和有效性.
结论:1. 混合土的渗透系数随着膨润土含量的升高而降低;用盐水饱和的试样,其渗透系数偏大,而不排水剪切强度呈相反的趋势.2. 由核磁试验获得的试样孔隙分布可用来解释其渗透系数的变化规律.3. 文中提出的经验关系式能够较好地预测混合土的力学特性,包括渗透系数和不排水剪切强度.

关键词:水盐效应;渗透系数;不排水剪切强度;膨润土混合土

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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