泥炭土的水力和电阻率特性试验研究

常高黎; 公飞; 赵红芬

doi:10.13471/j.cnki.acta.snus.2023D004

您当前的位置：

首页 >

文章列表页 >

泥炭土的水力和电阻率特性试验研究

研究论文 | 更新时间：2023-11-01

- 泥炭土的水力和电阻率特性试验研究
- An experimental study of the hydro-mechanical and electrical properties of peat
- 中山大学学报(自然科学版)(中英文) 2023年62卷第4期页码：10-20
- 作者机构：
  
  中山大学土木工程学院，广东珠海 519082
- 作者简介：
  
  CHANG Gaolichanggli@mail2.sysu.edu.cn
  GONG fei gongf5@mail2.sysu.edu.cn
  [ "ZHAO Hongfen（zhaohf7@mail.sysu.edu.cn）" ]
- 基金信息：
  
  National Natural Science Foundation of China(5227912)
- DOI：10.13471/j.cnki.acta.snus.2023D004
  中图分类号： TV213.4
- 纸质出版日期：2023-07-25，
  
  网络出版日期：2023-05-05，
  
  收稿日期：2023-01-13，
  
  录用日期：2023-02-22
扫描看全文
常高黎,公飞,赵红芬.泥炭土的水力和电阻率特性试验研究[J].中山大学学报(自然科学版),2023,62(04):10-20.

CHANG Gaoli,GONG Fei,ZHAO Hongfen.An experimental study of the hydro-mechanical and electrical properties of peat[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(04):10-20.
常高黎,公飞,赵红芬.泥炭土的水力和电阻率特性试验研究[J].中山大学学报(自然科学版),2023,62(04):10-20. DOI： 10.13471/j.cnki.acta.snus.2023D004.

CHANG Gaoli,GONG Fei,ZHAO Hongfen.An experimental study of the hydro-mechanical and electrical properties of peat[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(04):10-20. DOI： 10.13471/j.cnki.acta.snus.2023D004.

摘要

泥炭土是一种高度结构化，复杂多孔介质，具有独特的水-力特性。土体结构、孔隙比和纤维含量等物理性质对泥炭土的力学特性有十分重要的影响。感应极化（IP）技术通过测量电导率的实部（

΄）和虚部（

΄΄）来评估岩石和土体的物理、化学和水文地质性质。目前，泥炭土的电导率（

΄和

΄΄）与其物理性质之间的关系还不明确。本文改进了固结仪使其能进行电导率测量，针对原状样和重塑样开展了系列试验。试验结果表明，纤维泥炭土微观结构上的各向异性导致了其水-力和电导率呈现出各向异性。在固结过程中，泥炭土的结构不断演化，各向异性程度逐渐降低，伴随着

΄的降低，

΄΄则没有受到显著影响。

΄和

΄΄都随着孔隙流体电导率

的增加而显著增加，且近似于

的幂指数关系。

Abstract

Peats are structured and highly complex porous media

with unique hydro-mechanical responses. The complex behaviour of peats is affected by several soil properties

such as soil fabric

void ratio

and fibre content. The induced polarization (IP) technique measuring the real (

΄) and the imaginary part (

΄΄) of the complex electrical conductivity has been used to estimate the physical

chemical and hydrogeological properties of rock and soils. However

the relationships between electrical conductivity (

΄ and

΄΄) and those peat properties are rarely known. For this purpose

a modified hydraulic oedometer cell with electrical measurement was built for laboratory investigation. A series of tests on natural and reconstituted peat samples were performed. The test results show that the fabric anisotropy of fibrous peats plays a crucial role in the hydro-mechanical and electrical conductivity anisotropy. The degree of anisotropy decreases gradually during the consolidation process

accompanied by a decrease in

whereas the

΄΄ is not significantly affected. Both the

΄ and

΄΄ are strongly increased with pore fluid conductivity

approximating power-law dependence on

关键词

电导率土体结构各向异性孔隙流体电导率

Keywords

electrical conductivitysoil fabricanisotropicpore fluid conductivity

references

ASTM,2013.Standard test method for laboratory determination of the fiber content of peat samples by dry mass:D1997-13[S]. West Conshohocken, PA.

ASTM,2014.Standard test method for specific gravity of soil solids by gas pycnometer:D5550-14[S].West Conshohocken, PA.

BINLEY A, KEMNA A,2005.DC resistivity and induced polarization methods[J].Hydrogeophysics,50:129-156.

CASAGRANDE A, 1936.The determination of the preconcolidation load and its practical influence[C]//Proceedings of 1st International Conf on Soil,Vol.3. Harvard Univ., Cambridge, MA: 60-64.

COMAS X, SLATER L, REEVE A,2004.Geophysical evidence for peat basin morphology and stratigraphic controls on vegetation observed in a Northern Peatland[J].J Hydrol, 295:173-184.

HENDRY M T, SHARMA J S, MARTIN C D, et al., 2012.Effect of fibre content and structure on anisotropic elastic stiffness and shear strength of peat[J].Can Geotech J, 49(4):403-415.

KAZEMIAN S, PRASAD A,HUAT B B K, et al.,2011.A state of art review of peat: Geotechnical engineering perspective[J].Int J Phys Sci, 6:1974-1981.

KUMAR A, WALIA B S, MOHAN J,2006.Compressive strength of fiber reinforced highly compressible clay[J].Constr Build Mater, 20(10):1063-1068.

LESMES D P, FRYE K M,2001. Influence of pore fluid chemistry on the complex conductivity and induced polarization responses of Berea sandstone[J].J Geophys Res Solid Earth, 106(B3):4079-4090.

MESRI G, AJLOUNI M,2007.Engineering properties of fibrous peats[J].J Geotech Geoenviron Eng,133:850-866.

MURARO S,2019.The deviatoric behaviour of peat: A route between past empiricism and future perspectives[D].The Netherlands: Delft University of Technology.

MURARO S, JOMMI C,2021.Experimental determination of the shear strength of peat from standard undrained triaxial tests: Correcting for the effects of end restraint[J].G􀆧otechnǐque, 71:76-87.

OURS D P, SIEGEL D I, GLASER P H, 1997.Chemical dilation and the dual porosity of humified bog peat[J].J Hydrol, 196: 348-360.

PONZIANI M, SLOB E C, VANHALA H, et al.,2012.Influence of physical and chemical properties on the low-frequency complex conductivity of peat[J].Near Surf Geophys,10(6):491-501.

PUGH IV A L, NORTON S A, SCHAUFFLER M, et al., 1996.Interactions between peat and salt-contaminated runoff in Alton Bog,Maine,USA[J].J Hydrol,182:83-104.

QUINTON W L, ELLIOT T, PRICE J S, et al.,2009.Measuring physical and hydraulic properties of peat from X-ray tomography[J].Geoderma, 153:269-277.

REZANEZHAD F, QUINTON W L, PRICE J S, et al.,2010.Influence of pore size and geometry on peat unsaturated hydraulic conductivity computed from 3D computed tomography image analysis[J].Hydrol Process,24(21):2983-2994.

SIEGEL D I, GLASER P H, 1987.Groundwater flow in a Bog-Fen Complex,Lost River Peatland,Northern Minnesota[J]. J Ecol, 75(3):743.

SLATER L, REEVE A,2002.Understanding peatland hydrology and stratigraphy using integrated electrical geophysics[J].Geophysics, 67(2):365-378.

THEIMER B D, NOBES D C, WARNER B G, 1994.A study of the geoelectrical properties of peatlands and their influence on ground-penetrating radar surveying[J].Geophys Prospect, 42(3):179-209.

WILCOX D A, 1986.The effects of deicing salts on water chemistry in Pinhook Bog, Indiana[J].J Am Water Resour Assoc, 22(1):57-65.

YAMAGUCHI H, 1992.Changes in pore size distribution in isotropic consolidation and drained shear processes of undisturbed peat[J].Soils Found, 32(4):1-8

ZHAO H F, JOMMI C,2022.Consequences of drying on the engineering properties of fibrous peats:Compression behaviour[J].Can Geotech J, 59(10):1712-1727.

ZHAO H F, CHEN Y D, ZHOU Z X, et al,2021.Consequence of drying on the compression behaviour of soft clay[J].Bull Eng Geol Environ, 80:7933-7944.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

暂无数据