Creep behavior of laboratory embankment reinforced with geogrid

In order to investigate long-term stabilization of embankment structure reinforced with geogrids, it is important to elucidate not only creep characteristic of geogrid but also creep behavior of whole reinforced embankment using geogrid by loading for a long time. This time, the authors have conducted laboratory slope model tests which are stage loading (3 steps) extending for a long time, in order to make clear the modified characteristics that are by means of creep, of reinforced embankment. The creep model tests were conducted considering both setting up the length of geogrids and layer number of them as a parameter. Based on these observations of these test, they were found that the increase of not only transformation of reinforced embankment but also strain of geogrid laying in the model embankment considering as a creep ingredient. And the range of increase was recorded so remarkably as to load large degree of weight. Moreover, the increasing strain speed of the geogrid changed the length of them laying in the embankment, but it was constant in spite of the layer number of geogrids under laying same length of them, and it was admitted the tendency that the creep ingredient for long-term loading was getting smaller as time passed. And also the tendency was well explained by FEM analysis. This paper summarizes these results.