Multi-axial Geogrid Stabilized Working Platform for Ringer Crane Operation

ABSTRACT: Design and construction of a geogrid stabilized working platform for use with a ringer crane in the US was undertaken in 2016 and completed in 2017. The ringer crane was configured with a maximum bearing pressure of 192 kPa, a loadspreader ring with outside and inside diameters 56 m and 33.2 m, respectively, and was rated the third largest in the world.Stringent criteria for differential and total settlement needed to be met to ensure successful crane operation. Site conditions exhibited predominantly fat clays and occasional sandy silt lenses. A geogrid stabilized working platform was designed to improve allowable bearing capacity of the soil and to decrease potential settlement. Estimated total cost savings of $3.1million when compared with original plans to construct a deep foundation system. Success of the geogrid stabilized platform was further demonstrated when it withstood Hurricane Harvey without damage and the crane was back in operation the day after the storm passed.