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  • The Evolution of Launched Soil Nails

    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 to250 miles/hour, and at…
  • A History of Deep Vibratory Methods for Ground Improvement

    A Cost-Effective Foundation Solution for 80+ Years   Deep vibratory ground improvement methods, collectively referred to as vibro systems, have been utilized by the construction community in one form or another for the past 80 years. Development…
  • A Light in the Deep

    For deep-water energy developments, hazard identification and risk assessments (that is, assessing the probability of occurrence along with the consequences of failure) are more important than ever before. In light of these needs and the…

THE EVOLUTION OF LAUNCHED SOIL NAILS

September/October 2016

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 nailsreinforce an unstable or potentiallyunstable soil mass by transferringthe nail’s tensile and shear capacityinto 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.

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