通过用改装的应力 -应变控制式三轴仪 ,对等应力比条件下的非饱和原状黄土进行了“分级浸水”,同时测试了试样在初始、加压固结和浸水湿陷几个状态下孔隙气压力和孔隙水压力的变化过程。初步分析了非饱和原状黄土湿陷变形特性以及湿陷过程中的孔隙水压力、孔隙气压力以及基质吸力的演化规律 By using the modified stress-strain controlled triaxial apparatus, the unsaturated intact loess under equal stress conditions was subjected to “graded water immersion”. At the same time, the specimens were tested in several states of initial, compression consolidation and water immersion and collapse Under the pore pressure and pore water pressure changes. The deformation characteristics of intact undisturbed loess and the evolution of pore water pressure, pore pressure and matrix suction during the collapse process are analyzed preliminarily