STRESS ANALYSIS OF EMBANKMENT DUE TO DIFFERENT IN CONSTRUCTION CONDITIONS

Abstract

: In recent years, many examples of soil structure collapse due to heavy rainfall have occurred.
Because of this, it is urgent to establish a method to evaluate and examine long-term embankment structure
quality. Japan's conventional design method insufficiently evaluates embankments. Although this method is
shifting to a performance-based design to cope with recent abnormal weather, an effective design method has
not yet been established. Therefore, this research performs an initial stress analysis of embankment,
accounting for differences in construction conditions. Notable in this study, is the comparative analysis of
results, considering the initial water content ratio, one layer of discharge thickness, rolling compaction, and
other given structural conditions that differed from conventional design standards. To do this, first the initial
moisture content ratio was determined by reproducing the compaction by analysis. Second, based on the
dynamics of unsaturated soil, the rainfall intensity was analyzed in order to confirm the variation of the initial
stress due to rainfall. Lastly, and most critically, the dynamic change in embankment performance was
analytically expressed, and the optimal structural conditions of embankment, grouped by rainfall history, was
examined