Innovative Soil Nailing & Soil Nail Monitoring

Nate Beard, P.E. Soil Nail Launcher, Inc.

Merged to form GeoStabilization International

Overview

• Innovative Soil Nailing

– Launched Soil Nails

– Soil Nail Configurations 

• Piling Wall Replacement Alternative

• Roadway Stabilization & Widening Alternative

• Soil Nail Monitoring

– Hyalite Canyon, MT

Compressed Air

Original vessel developed by the British during war time.

Breech Valve

Interstate 75

John Curran, CEO Rocscience

Piling Wall Replacement or Improvements

Hyalite Canyon, Gallatin NF

Project Location

• Slide was triggered in 2007

– Part of an old (geologic) bedrock slide with shallow infinite slope failure

– Most recreated Forest Service area in the region. Material moved every spring

Soil nail the active portion of the slope near the top.303 hollow bar soil nails (HBSN)65 micropiles

Geosynthetic Reinforced Soil (GRS) wall constructed at the bottom for debris catchment purposes.

Self‐Drilling SuperNails

Satellite View

Monitoring

• 5 Load Cells

• 2 Piezometers– 15’ and 24.5’ below grade

• 2 Slope Inclinometer Casings– Each 40 feet below grade

– Require use of external slope inclinometer torpedo

• Able to take remote readings from the load cells and piezometers

Questions?

Hyalite Project Acknowledgements

• Gallatin National Forest

– Johnathan Kempff, P.E., Forest Engineer

– Jeff Hiedeman, Field Technician

– Grant Morrison, EIT

• USDA Forest Service, Northern Region Geotechnical Engineers

– Bill Vischer, P.E.

– Ed Rose