中山大学学报（自然科学版）（中英文）2023，Vol.62Issue(4)：10-20,11.DOI:10.13471/j.cnki.acta.snus.2023D004
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
摘要
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(σ')and the imaginary part(σ")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(σ' and σ")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 σ',whereas the σ" is not significantly affected.Both the σ' and σ" are strongly increased with pore fluid conductivity σw,approximating power-law dependence on σw.关键词
电导率/土体结构/各向异性/孔隙流体电导率Key words
electrical conductivity/soil fabric/anisotropic/pore fluid conductivity分类
建筑与水利引用本文复制引用
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）（中英文）,2023,62(4):10-20,11.基金项目
Supported by National Natural Science Foundation of China(5227912) （5227912）
