滨海盐渍土土-水特征曲线试验研究

针对黄骅港滨海非饱和盐渍土,采用滤纸法对不同含盐量、不同含水率土样的吸力进行试验研究,分析其土-水特性及含盐量与各吸力之间的关系,以及吸力的影响因素及变化规律,并拟合建立基质吸力与体积含水率,渗透吸力与含盐量、体积含水率的数学模型。结果表明:含盐量的改变对总吸力和渗透吸力影响较大;基质吸力与体积含水率呈指数关系;拟合得到的渗透吸力与含盐量、体积含水率模型具有较高的拟合优度。研究成果可为分析非饱和盐渍土工程特性提供参考。

Experimental Study on Soil-Water Characteristic Curve of Coastal Saline Soil

The suction of coastal unsaturated saline soil at Huanghua Port with varied salt content and moisture content was studied via filter paper method. The soil-water characteristics together with the relationship between salt content and suction was examined, and the influencing factors and change rules of suction were analyzed. Moreover, the mathematical models of matric suction against volumetric water content, and osmotic suction against salt content and volumetric water content were established by fitting. Results revealed that the change of salt content had a great influence on total suction and osmotic suction. An exponential relationship was found between matric suction and volumetric water content. The model of osmotic suction against salt content and volumetric water content is of high goodness of fit.