粉土最优土水特征曲线模型  

Study on the Optimum Soil-water Characteristic Curve of Silty Soil

作　　者：张正安 赵强 ZHANG Zhengan(Henan Excellence Construction Engineering Co.LTD,Zhengzhou 450000,China;Henan Scientific Research Platform Service Center,Zhengzhou 454000,China)

机构地区：[1]河南卓越建设工程有限公司,河南郑州450000 [2]河南省科研平台服务中心,河南郑州450000

出　　处：《洛阳理工学院学报（自然科学版）》2023年第4期8-13,共6页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：基于压力板仪的轴平移技术,对粉土试样开展室内试验。测试多组特定吸力下试样的含水率,选用Van Genuchten模型、Gardner模型、Fredlund-Xing模型3种幂函数形式的土水特征曲线(SWCC)模型对试验数据进行拟合,得到各模型的拟合参数。3种函数模型的拟合方差依次为Van Genuchten模型>Fredlund-Xing模型>Gardner模型,即3种SWCC模型中Van Genuchten模型对试验用粉土的SWCC拟合精度最高,结果最优。Based on axial translation technology of pressure plate instrument,laboratory tests were carried out on silty soil samples.To test the moisture content of the samples under multiple groups of specific suction forces.SWCC models with three power function forms,namely Van Genuchten model,Gardner model and Fredlund-Xing model,were used to fit the test data.The fitting parameters of each model are obtained.The results show that the fitting variance of the three functional models is in order of Van Genuchten model>Fredlund-Xing model>Gardner model.Therefore,among the three SWCC models,Van Genuchten model has high fitting accuracy and optimal results for the SWCC of the experimental silt.

关 键 词：压力板仪 土水特征曲线 粉土 SWCC模型 

分 类 号：TU4[建筑科学—土工工程]