A Case Investigation of Liquefaction Features in A Coastal Industrial Parkby Using Ground Penetrating Radar

摘要

Ground Penetrating Radar (GPR) surveys were performed at a soilrnliquefaction site in the Lukang West 2nd District of the Chang-HwarnCoastal Industrial Park, one week after the Chi-Chi earthquakern(ML=7.3). The aim of surveys was trying to identify the phenomenon ofrnliquefaction. The result shows that sand boiling produced arncharacteristic radar signature. Its shape likes a funnel with disorderedrnand stronger reflection in the 2D radar profile. The 3D GPR image wasrnalso established by combining several 2D radar profiles. The slices ofrn3D image are useful for understanding the nature of subsurfacernstructures over the investigation area at different depths. According tornthe radar images, one can identify the location and extent ofrnearthquake-induced liquefaction.