Variation of Matric Suction in Unsaturated Loess Soils
It is well-known that natural loess soil occurs in unsaturated state.Hence,its shear strength is largely controlled by the matric suction presented in the unsaturated soils.To explore variation characteristics of matric suction within loess soils and its influencing factors apart from moisture content,an experimental study was performed using the loess soils collected from Lanzhou city,China.The results showed that structure,mineral compositions and soluble salts were the most important three factors controlling the variation of the matric suction in the loess soils.It seems that variation of the matric suction,particularly the residual moisture content,had inverse correlations with density of the soils,the abundance of interlayered smectite and illite (I/S) within the soils,while they had somewhat linear relations with abundance of soluble salts present in the soils.
Unsaturated loess soil Matric suction Soil water characteristic curve I/S Dry density Soluble salts content
Boxun JI Baoping WEN Yajin YAN Hui LI
School of Water Resources and Environment,China University of Geosciences,No.29,Xueyuan Rd,Haidian District,Beijing 100083,P.R.China
国际会议
The 2nd China-Japan Graduate Student Forum -- Life, Environment and Energy (第二届中日研究生论坛--生命,环境与能源)
北京
英文
437-442
2009-09-24（万方平台首次上网日期，不代表论文的发表时间）