离子土壤固化剂对非饱和砂土影响的试验研究

Experimental study of ionic soil stabilizer-affect the unsaturated sandy soil

以昆明市团结乡的砂土为研究对象,对非饱和砂土及加入离子固化剂改性砂土进行了三轴压缩试验。在不同含水率不同围压下,比较非饱和砂土在加入离子固化剂前后力学强度和变形特性指标及应力-应变关系曲线;对未加固化剂和加入固化剂非饱和砂土进行了变形模量分析,拟合应力-应变关系进行了归一化研究,得出非饱和砂土的Duncan-Chang模型参数的变化规律,为改性非饱和砂土的理论研究提供参考。

Taking sand as the research object in the village of Tuanjie,Kunming city,a series of triaxial tests are carried out on unsaturated soil and after treated by ionic soil stabilizer.After treated by ionic soil stabilizer,the mechanical strength deformation characteristics and stress strain relation curve of unsaturated soils are compared under different water content and confining pressure.For without adding ionic soil stabilizer and ionic soil stabilizer of unsaturated sand to analysis the deformation modulus,fitting stress-strain relationship to normalized equation study,the change rule of Duncan-Chang model parameters of unsaturated sandy soil is obtained,which provides reference for the theoretical study of modified unsaturated sandy soil.