Location:	Daytona International Speedway; Winston Tower Expansion
	Owner:	NASCAR
	Engineers:	Universal Engineering Sciences, Inc.
	General Contractor:	Foley & Associates

Problem

Expansion of grandstands required a 12' sheer cut of soils embankments in lieu of massive excavation and shoring of column pads.  Time schedule for work was tight due to upcoming Winston Cup Race.

Solution

HGS was contracted to inject a sodium silicate based grout along the perimeter of the excavation zone to form a cut-off wall enabling the existing soil to be cut vertically without loss of soil support on adjacent column foundations.  Injections were placed to a depth of up to 20' and on 2' spacing.  Supported soil wall allowed for a clean excavation and construction of new foundations and cut about 3 weeks off project schedule.