Along with the enlargement of compaction machines and the development of construction technology with ICT, the high performance embankment structure and the improvement construction efficiency have been progressing. Recently, the embankment performance required by design and quality control of the embankment structure in the field are on the way to be associated. In addition, it has been found that the strength-deformation characteristics of the fill material compacted well with a large compaction energy such as a large compaction machine are superior to general values ​​used in specification design. However, most of the results of their strength and deformation characteristics used specimens prepared by compacting in a confined steel mold in a laboratory. There are few researches which were targeted for specimens retrieved from a filling ground compacted by roller vibration machine.

締固め機械の大型化やICTを利用した施工技術の向上により，高い要求性能の盛土構造物の実現や施工の効率化が進んでおり，近年では設計で定めた盛土構造物の要求性能と盛土の締固め管理方法に関連を持たせて施工管理方法を合理化する検討が進められている。また，大型締固め機械で良く締固められた盛土材の強度変形特性は仕様設計等で用いられる一般的な値に比べて大きいことがわかっている。しかし，それらの強度変形特性の評価は，室内の拘束されたモールド内で突き固めて作製した供試体より求めたものが多く，締固め機械を用いた盛土地盤から採取した供試体を対象にした実施例は少ない。