EVALUATION OF CEMENT COLUMN FOR INCREASING STABILITY OF EMBANKMENT ON SILTY CLAY DURING EARTHQUAKES
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概要
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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.
- 公益社団法人 地盤工学会の論文
公益社団法人 地盤工学会 | 論文
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