NUMERICAL ANALYSIS OF STRESS AND DEFORMATION BEHAVIOR OF REINFORCED EMBANKMENT ON STEEP SLOPE

Aiming at the demand of increasing mountain roadway construction, the stress and deformation behavior of reinforced embankment on steep slope with different angles was studied comparatively by finite element method based on the parametric analysis of backslope friction angle, backfill strength and filling height. The results indicate that compared to the conventional embankment constructed on level ground, the decrease of backfill strength and raise of filling height will increase the deformation of reinforced embankment on steep slope more severely, and the reinforced embankment on steep slope may have disadvantages in the control of deformation, base pressure and wall deflection etc.,which is due to the sliding of backfill along the slope. Based on different backslope friction angles, backfill strength and heights, respectively, the deformation of reinforced embankment on 45slope is 6.8%~96.8% and 29.4%~192.3%, 6.8%~33.1% and 29.4%~77.9%, 7.7%~37.9% and 27.2%~91.6% larger than those of the embankment on 63.4(slope ratio=2:1) slope and embankment on 90slope(level ground),respectively. The results can provide guidance for the increasing road construction in mountainous areas.