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Variation of Matric Suction in Unsaturated Loess Soils

机译:黄土非饱和土壤基质吸力的变化

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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.
机译:众所周知,天然黄土处于非饱和状态。因此,其剪切强度主要受非饱和土中基质吸力的控制。探讨黄土中基质吸力的变化特征及其除水分外的影响因素。利用兰州市黄土土壤进行了试验研究,结果表明,结构,矿物质组成和可溶性盐分是控制黄土中基质吸力变化的最重要的三个因素。基质吸力的变化,特别是残余水分含量,与土壤密度,土壤中层状蒙脱石和伊利石(I / S)的含量成反比,而与土壤中可溶性盐的含量成线性关系。土壤。

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