非饱和土吸力中的路径问题

为了明确非饱和土水分特征曲线中吸力的路径问题，使用可以同时实测吸水和失水曲线的吸引法，对几种士试样进行了试验。依据试验结果，对土的种类、粒度级配与吸力路径的关系进行了阐述。进一步对吸力路径分歧的大小以及评价方法作了讨论。

Hysteresis of Suction in Unsaturated Soil

In order to make the hystersis of moisture characteristic curve in unsaturated soil obvious, we measurement the suction of some soil samples, to use a sucking method that be able to measure wetting curve and drying curve simultaneously. Based on the results of the measurements, this paper reviewed the rellation of hysteresis with the kind and texture of soil. Also we discussed the method to evaluate hysteresis lop.