1. Current Research on Slope Stabilization with In-situ Reinforcement
J. Erik Loehr
Department of Civil Engineering
University of Missouri - Columbia

2. Ongoing Research Projects
Slope Stabilization Using Recycled Plastic Pins
Missouri Department of Transportation
Epoch Composite Products
The Judy Company
Stabilization of Earth Slopes Using Reticulated In-situ Reinforcement
National Science Foundation

3. In-situ Reinforcement of Slopes
after Bruce and Jewell, 1986

4. Key Issues being investigated
Limiting soil pressure
Influence of member spacing
Influence of member size
Axial vs. lateral load transfer
Influence of member orientation
Effect on overall stability
Group/network effects

5. Field Demonstration Sites
Slope Angle
General Characteristics
I-435 (Wornall Rd.)
2.2:1
Zoned embankment
I-435 (Holmes Rd.)
2.5:1
US 36 (Stewartsville)
Zoned cut
I-70 (Emma)
Homogeneous fill
US 54 (Fulton)
3.2:1
Homogeneous cut
All surficial failures!!

6. I435-Wornall Rd Slide

7. I435-Wornall Rd. Site Layout

8. I435-Wornall Rd. Completed Installation

9. US36-Stewartsville Slide

10. US36 Stewartsville Site Layout

11. US36-Stewartsville Completed Installation

12. Large-scale Laboratory Modeling

13. Purpose of Large-scale Tilt Box
Intermediate to full-scale field tests and centrifuge testing
Will permit
Rapid evaluation of alternative reinforcement scenarios and methods at near field scale
Construction using “field-like” equipment
Calibration of numerical models

14. Small-scale Tilt Device

15. Other Activities Back-analysis of case histories Numerical modeling
Stability prediction contest

16. THANKS!