Landslide Prevention Project Description:
A major landslide forced the closure of the beautiful Blue Ridge Parkway near Deep Gap, NC. The road in the slide location was originally constructed on a deep embankment fill. The slope of the embankment fill varies, but averages 1.5(H):1(V) near the crest then gradually flattens to 2(H):1(V). Past roadway and drainage repairs attempted in the 1970’s, 1980’s, and again in the 1990’s were not successful long term. A permanent solution was needed.
Solutions
Following the design provided by the FHWA, Subsurface installed multiple rows of anchors in stages through the existing embankment fill slope. Each anchor tied back a 9’ x 9’ x 2’ thick concrete bearing plate. The anchors permanently hold the embankment fill in place.
Details
- 9 rows of anchors
- 90 anchors
- 100 feet in length
- 280 kips each
Project Partners
- Taylor and Murphy Construction
- Federal Highway Administration
- Eastern Federal Lands Highway Division
