Abstract：In order to reveal the mesoscopic deformation mechanism of loess high-fill foundation of Luliang airport，the soil electrical resistivity-consolidation combination measuring instrument are developed based on the principle of soil electrical resistivity. The dynamic variation law of the electrical resistivity of Q3 loess are obtained through in-situ monitoring，field sampling and laboratory test under different initial saturations and constant load. The electrical resistivity-strain curve model of Q3 loess to the limits of optimum moisture content is proposed；and its moisture migration and structural changing characteristics under constant load are also obtained. The study results show that the post-construction deformation of the loess high-fill foundation top surface is composed of the consolidation deformation of initial foundation and the fill bellow the surface to a certain depth and the long-term creep deformation of deep overconsolidated soil. The mesoscopic deformation mechanism of soil is revealed initially；and the study provides scientific basis for the establishment of loess high-fill soil constitutive model and reasonable selection of the numerical analysis model.
2013, Vol. 32 
