災害廃棄物分別土砂に夾雑する木片類の腐朽を考慮した地盤特性評価に関する研究

Abstract

This paper concerns mechanical properties and their influences on foundation behaviors of the separated disaster waste soils containing wood chips. Compaction tests were carried out on several separated soils in order to discuss allowable amount of chips (Pw) to form adequate skeleton structure in soils. Series of tri-axial compression tests were also made to examine decomposition effects of wood chips on the deformation/strength properties and long-term behavior of the separated soils. The test results revealed that the separated soils having less than 8% of Pw can have appropriate stiff skeleton structure through compaction, which therefore showed little effect of decomposition on the reduction of their deformation/strength properties. Also noted in the paper are applicability of the falling ball inspection test on the quality evaluation and control of the separated waste soils and some mechanical aspects of the relationship between compaction conditions and the amount of chips (Pw).