軟弱地盤における側方流動-その実態と予測手法について-

Abstract

This paper starts with reviewing basic patterns of deformation of the soft clay foundationsloaded by embankments, along with suggestions for obtaining the integrated information onlateral soil movements from field measurements. In this respect, a new procedure for back-analyzing the strain path of any soil element below the center of embankment is proposed andis successfully applied to three cases of well instrumented test embankments(Kanda A, B andCubzac-les-Ponts B). Furthermore, effects of vertical sand drains on the correlation between late-ral deformation and consolidation settlement are discussed by comparing the performance of theKanda A test embankment on untreated soft foundations with the performance of the Kanda Btest embankment with vertical sand drains, in the light of the corresponding predictions fromcoupled elasto-viscoplastic consolidation analyses in terms of finite elements.