Hardin County KY-251 Spot Subgrade Stabilization Jackson Daugherty - PowerPoint PPT Presentation

Jul 29, 2023 •344 likes •516 views

Hardin County KY-251 Spot Subgrade Stabilization Jackson Daugherty , PE, PMP Dusty Barrett , PE, PMP American Engineers, Inc. Project Highlights Karst, faulting and slumped sandstone Slope stability Subgrade stabilization Project

Hardin County KY-251 Spot Subgrade Stabilization Jackson Daugherty , PE, PMP Dusty Barrett , PE, PMP American Engineers, Inc.
Project Highlights ▰ Karst, faulting and slumped sandstone ▰ Slope stability ▰ Subgrade stabilization
Project Setting
Karst ▰ Caves ▰ Sinkholes ▰ Karst ponds ▰ Slumped sandstone
Fault ▰ Slumped sandstone ▰ Deep overburden ▰ Fractured rock ▰ Seismic potential
Slope Stability ▰ Typical soil strength parameters ▰ NAVFAC 7.02 ▰ Long-term (effective) ▰ Intermediate-term (effective) ▰ Short-term (undrained)
Slope Stability
Slope Stability ▰ Triaxial Test ▰ Shear and saturation ▰ Pore pressure dissipation ▰ Predisposed failure plane (chert nodules) ▰ Lake Barkley
Slope Stability ▰ Future projects ▰ Reduce slopes ▰ Limit shear strength parameters
Subgrade Stabilization ▰ Chemical ▰ Stone ▰ Geogrid
Subgrade Stabilization ▰ Chemical ▰ Cement ▰ Lime https://www.youtube.com/watch?v=V5B5dv 9B3KE
Subgrade Stabilization ▰ Selecting the appropriate method ▰ Fines content ▰ Silts and sands vs. clays
Subgrade Stabilization ▰ Lime ▰ Calcium cation exchange ▰ Flocculation-agglomeration ▰ Pozzolanic reaction ▰ pH ≥ 12.4
Subgrade Stabilization ▰ Cement ▰ Soil-cement ▰ Cement modified soil ▰ Hydration
Subgrade Stabilization ▰ Special Note ▰ Selection during bidding ▰ Multiple stabilization options ▰ Station limits indicated in report
Questions Thanks for participating! Jackson Daugherty, PE, PMP jdaugherty@aei.cc Dusty Barrett, PE, PMP Follow us on dbarrett@aei.cc

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