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AQUASTOWING An Effective Means of Curbing Large Karstic Inflows - PowerPoint PPT Presentation

Mar 26, 2023 •113 likes •374 views

AQUASTOWING An Effective Means of Curbing Large Karstic Inflows Geohazards Impacting Transportation in Appalachia 17 th Annual Technical Forum Blacksburg, VA Eric Smith Engineer Sub-Technical Inc. WHAT IS AQUASTOWING? WHAT IS

  1. AQUASTOWING An Effective Means of Curbing Large Karstic Inflows Geohazards Impacting Transportation in Appalachia 17 th Annual Technical Forum Blacksburg, VA Eric Smith – Engineer Sub-Technical Inc.

  2. WHAT IS AQUASTOWING? WHAT IS AQUASTOWING?

  3. USA Karst Map – US Geological Survey

  4. Appalachian Karst Map – US Geological Survey

  5. Problems Associated With Problems Associated With Karst Karst Kimballton Limestone Mine Hydroelectric Dam Karstic Aquifer 6,000 GPM Karstic voiding 8,000 GPM Giles County, Virginia York, Pennsylvania Strip Mine Operation Acid Mine Drainage Indiana, Pennsylvania

  6. Problems Associated With Problems Associated With Karst Karst

  7. 7

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  9. Average Discharge Rates (GPM) Average Discharge Rates (GPM) GPM

  13. Compounding Problems Compounding Problems DECREASED Longer Haulage We need more Routes pumps! $1,000,000 + We need more Annual Electricity Limited Access: pump maintenance! Bill one road in & out EFFICIENCY Discharge Pumps 2/3 of the quarry is Earthen Dam constantly under Construction water! Increased Fuel Costs

  16. Clinton Point Quarry - Clinton Point Quarry - Karstic Features (Side Elevation) arstic Features (Side Elevation)

  17. AquaStowing AquaStowing Setup Setup

  20. Polyurethane Specs Polyurethane Specs Single Component – Moisture Activated Pre-Catalyzed Hydrophobic NSF-61 Approval Several Minute Reaction Time 2-lb Density – Free Rise Flexible Foam

  21. AquaStowing AquaStowing in Action n Action Gravel – ¾” Limestone Acts as a void filler Agitates the void space Becomes a carrier for the urethane Increased density of the urethane ”plug” Single Component Polyurethane Becomes the binding agent Migrates far from entry point Highly expansive Great adhesion to the strata

  22. Karst Flow Path Karst Flow Path

  23. DISCHARGE RATES DISCHARGE RATES Grouting Begins Earthen Dams Released Rain Event Rain Event (2.63”) (0.95”) Rain Event Rain Event (0.67”) (0.94”) All Contractors Off-Site

  24. Job Summary Job Summary 3 – 3 – Weeks On Site eeks On Site 5,500 Tons 5,500 Tons of Agregate of Agregate 60,000 lbs 60,000 lbs of Polyurethane f Polyurethane 28,000 GPM 28,000 GPM 5,000 GPM 5,000 GPM

  25. THANK YOU! THANK YOU! Any Questions? Eric Smith Engineer EricR@Sub-Technical.com

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