用收缩试验资料间接估算压力板试验中的体积含水量

土水特征曲线是表征非饱和土基本性质的重要曲线之一，一般由压力板试验测定。膨胀土试样在压力板试验中体积变化很大，且其体积变化值又不得而知，故只能得到其重力含水量与基质吸力的关系。本文建议用收缩试验资料来间接估算压力板试验中试样的体积含水量，从而可得到用体积含水量与基质吸力关系表达的土水特征曲线。

Estim ation of Volum etric W ater Content in the Pressure Plate Test by Use of Shrinkage Test Data

Soil w ater characteristic curve is one of the im portant graphs reflecting the fundam entalpropeties ofunsaturated soils, w hich is usually determ ined by the pressure plate test. Because volum e changeof the specim ens of expansive soils is considerable and the value of the volum e change is unknow n during thetest, only the relationship of gravitational w ater content and m atric suction can be obtained. An indirectm ethod to estim ate the volum etric w ater content of the specim ens of expansive soil through shrinkage testdata has been suggested in this paper, then the soil w ater characteristic curve in term s of volum etric w atercontent and m atric suction can be gained.