ANALYSIS OF EMBANKMENT STRESS PRODUCED DURING CONSTRUCTION AND IN-SERVICE PHASES CONSIDERING EMBANKMENT GEOMETRIES

Abstract

Soil compaction tests are carried out to improve embankment construction engineering
characteristics, such as stability and deformation. For construction, enclosed embankment structures perform
total strengthening and a measure of drainage functions. This provides stability, improves deformation
properties, and prevents the degradation or rot of objects placed in the embankment fill. Nevertheless, chances
are that inadequate compaction will cause material, such as rocks or stones, to fall from the slope surface, as
well as erosion. Therefore, the standards for embankment slope steepness set forth the use of a 1:1.8 ratio,
permissible on an as-needed basis to allow for mechanical rolling for compaction. When constructing steep
embankment slopes, it is necessary to conduct embankment stability checks and fully consider the provision
of slope protection to prevent erosion. However, differences in stress conditions attributable to varying slope
steepness have not been elucidated. In this study analyzes embankment construction in terms of different
construction seasons and slope change, using the unsaturated soil-water-air coupled FEM analysis program. In
this way, more accurate qualitative evaluation could be achieved.