ABSTRACT
This paper presents a study on feasibility and seismic stability of the embankment methods using the lightweight materials for the purpose of reducing the effect of land cutting in road construction on the steep slopes. The application of lightweight embankment methods on mountainous roads possesses the potential for meeting the various social needs, such as the conservation of natural environment in road construction, the simplification of the disaster management of roads, the progress in recycling of waste soil, the reduction of construction costs, and so on. By the approach of trial designs of cross section that is assumed to consist mainly of fill, it is proved that lightweight embankment methods have the advantage over conventional embankment methods in the cases of the steep rocky slope and the slope that has thick colluvium deposit.
