ABSTRACT
Through the triaxial test and soil water saturation characteristic curve test of remolded loess, the variation laws of soil cohesion c and internal friction angle under different saturation conditions are studied. The test results show that the cohesion c and internal friction angle of soil decrease with the increase of saturation Dr. Internal friction angle at test saturation (34.0%) Within the variation range of 68.5%), it shows a linear downward trend with the increase of saturation; the cohesion c decreases gradually with the increase of saturation in the range of saturation (34.0% ~ 51.0%), and decreases sharply in the range of saturation (51.0% ~ 68.5%). Based on the test, a three-dimensional finite element model is established to study the settlement deformation of high fill loess roadbed under different saturation conditions. It is calculated that the maximum settlement difference at the midpoint of roadbed is 2.05 mm, and the maximum settlement differences on the left and right sides of roadbed are 1.51 mm and 2.14 mm, respectively, and the settlement curves of different saturation degrees are basically the same; the finite element calculation results show that as the saturation of the loess increases, the settlement of the roadbed also increases, but the increase is small, so the saturation change has an effect on the high fill of the loess area The settlement and deformation of the roadbed have little effect.
