Abstract
Currently, the stability analysis of embankments founded on soft ground stabilized with DCM (Deep Cement Mixing) columns has been performed based on a limit equilibrium analysis by using a shear strength of composite ground. Recent research efforts based on centrifuge tests, numerical analyses, and case studies revealed that the group of DCM columns might fail by several failure modes governed not only by shear failure but also by bending failure. So, the applicability of current practice for the stability analysis of embankments founded on soft ground stabilized with DCM columns is uncertain. Therefore, the bending moment capacity of DCM columns needs to be incorporated in the stability analysis. In this study, PVA fiber has been added to improve the bending moment capacity of DCM columns. This paper presents the effects of cement contents, PVA fiber contents and lengths, and curing periods on the flexural strength characteristics of PVA fiber reinforced soil-cement mixtures through a series of third point bending tests.
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