Abstract
Not only the reinforced embankment with geogrid but also the retaining wall with concrete box-type wall have become popular geotechnical structures. This is because the effectiveness and reliability for those structures have been well evaluated. On the other hand, the ground conditions and the circumstance where these structures are constructed have become more complicated, so that the combined technique for those two structures has also been conducted nowadays. It is expected for this combined technique that the advantages for both structures have to be well performed individually. So far, not many measurement data for this combined technique at real construction site have not been obtained and the accumulation of these data is expected in order to evaluate this combined technique quantitatively. The objective of this paper is to evaluate the reinforcing effect for this combined technique based on the measurement data at the real construction site of road embankment in Kyushu, Japan. At the construction site, earth pressures, deformations of the backfill and geogrids, and pore water pressure were measured during step by step construction. Finally, the effectiveness of the use of geogrids for concrete box-type retaining wall was discussed based on those measured data.
