NAB Building P-780

August 2002 at Coronado, USA


Method Applied

Bottom Feed Stone Columns

Average Depth


Dry Bottom Feed Stone Columns with Stitcher® unit.

Treatment to 8 m (26 ft) depth. 2,288 m (7,500 ft) of columns installed in rows with a 2.43 m (8 ft) triangular grid.

Determination of placed gravel volume over depth from the printout of the quality control recorder. CPT sounding between Stone Column points. Achieve CPT resistance of average qc = 15 MPa and minimum 12 MPa in densifiable layers.