Launched soil nails are a unique remedial technology in the geotechnical construction toolbox. These 20-ft-long, 1.5-in.-diameter nails are installed in a single shot using a compressed air “cannon” at velocities of up to 250 miles/hour, and at rates approaching 250 nails/day. The nails reinforce an unstable or potentially unstable soil mass by transferring the nail’s tensile and shear capacity into the sliding soil. However, at least as interesting as the tool itself, is the story behind the development of launched soil nail technology over the past 30 years.
Alabama Department of Transportation (ALDOT) publicly bid a design-build Request for Proposal (RFP) to solicit competitive proposals (Technical Proposals and Bid Price Proposals) from qualified Design-Build-Warranty firms for work activities required to design and construct slope stabilization systems for I-22 West Bound at MM 17.400.