FULL SCALE SHAKING TABLE TESTS ON REINFORCED SMALL EARTH DAMS WITH SOIL BAG SYSTEM
Effect on Seismic Resistance of Soil Bags Slope with Different Stacking Directions
2009 Volume 24 Pages 157-164
Details
2009 Volume 24 Pages 157-164
Most of small earth fill dams had been built long before adopting the modern design. Therefore, there are too many inadequate small earth dams by a current standard design. In view of this circumstance, we have to make a strategy against disaster risk by earthquakes and heavy rainfalls, and need a new type of rehabilitation technology for disaster protection and/or mitigation. In this study, in order to increase stability of a small earth dam against seismic force and overtopping, two types of full scale shaking model tests with soil bag system were conducted in stepwise shaking with regular acc. wave. One is conventional type with stacked horizontal(δ=0°). The other is a proposed type with stacked inclined(δ=18°), like a masonry wall. As a result, slippage between soil bag interfaces easily occurred at max. acc. of 500gal in the horizontal stacking case. On the other hand, in the inclined case, slippage between soil bag interfaces hardly occurred even at 1,000 gal. It was found that just changing stacked direction could improve a seismic stability of soil bag slope.
