EVALUATION OF CEMENT COLUMN FOR INCREASING STABILITY OF EMBANKMENT ON SILTY CLAY DURING EARTHQUAKES

概要

論文の詳細を見る
A series of dynamic centrifuge tests (1:50 scale) of embankments founded on clay clarified the following: (i) a dynamic load of α = 250 gal, simulating an earthquake, induced large deformation and settlement in both the embankment and clay under a gravity field of 50 G; (ii) deformation and instability were minimised by installing a cement-treated layer up to the bottom of the clay foundation. Despite these findings, it is still uncertain whether an embankment would be safer than a clay foundation or which embankments or soil layers would give rise to instability during strong motion earthquakes. This paper presents results of a dynamic FE method applied to that problem. Increasing strength of cement-treated clay increases overall stability of the embankment and foundation together. A design chart has been produced to indicate which combination of embankment and cement-treated clay foundations would tend to be more stable during earthquakes. Engineers can decide whether it is necessary to strengthen the embankment or the foundation layer.
社団法人地盤工学会の論文
2004-06-15