Centrifuge model tests on influence of slope height on stability of soft clay slope

摘要

The deep mixing method was developed in Japan in the 1970s and has been frequently applied to on land and marine constructions. The group column type improved ground is often applied to stability of embankment and soft ground. The current design procedure of the improved ground assumes the external and internal failures. The authors start a research project to investigate the applicability and the design procedure of the group column type deep mixing improvement on the stability of soft clay slope. As a primary research of the project, a series of centrifuge model tests and numerical analyses were carried out to investigate the influence of slope height on stability and deformation of soft clay slope. The study reveals that the height of embankment at failure increases with decrease of height of slope and can be evaluated by the Fellenius slip circle analysis precisely.