事前圧密された飽和粘土の二次圧密係数について

概要

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The precompression techniques are of great use for controlling the residual settlement due to secondary compression, and it is possible to estimate the settlement of the structures over long period, by using the relation between the coefficient of secondary compression and the effective over consolidation ratio σ^^^-/σ_ƒ where σ^^^- is the effective stress attained in the precompression stage and σ_ƒ is the structural loading intensity. In this paper, the coefficients of the secondary compression during the recompression stage are obtained for several clays, and it is clarified that the greater the plasticity index I_p, the more the efficiency of the precompression technique becomes, and that to eliminate the residual settlement of the structures it is necessary to keep the effective over consolidation ratio at about 1.8,by controlling the preloading intensity and loading duration.
山口大学の論文