As part of improvements to a roadway in coastal South Carolina, a portion of the road crossing reclaimed marshland was widened. The new lanes were constructed on a column supported embankment consisting of sand fill reinforced by geogrid and supported by vibro-concrete ...

The original subgrade conditions generally consisted of loose, liquefiable sands, expected to significantly lose strength during the design earthquake and soft, compressible clays. To mitigate the risk of liquefaction-induced instability and to mitigate the ...