Stabilizing A Slope Using A High Strength Wicking Geotextile

This project utilized the draining and reinforcing properties of a High Strength Wicking Geotextile used to stabilize a failed detention pond. The existing pond had multiple surficial failures within its 2:1 (Horizontal: Vertical) highly plastic clay and silt side slopes. Upon reaching saturation, the slopes became unstable and sloughed into the floor of the detention pond. The original design called for the soils within the failed zones to be removed and replaced with a conventional stone filled wire basket retaining structure. The plans called for the placement of stone filled wire baskets to a height that would reduce the side slopes to a stable angle of repose. During construction, it was apparent that access to the site was limited, making the project more expensive than originally proposed. A value engineered option using a high strength wicking geotextile was evaluated and determined to be an economical alternative. The geotextile was placed in multiple lifts horizontally along the previously failed sections of the pond and backfilled with the onsite soils. The geotextile provided strength and drainage allowing for the reconstruction of the slopes at the pre-existing slope angles. The cost savings achieved by using the on-site soils as backfill along with the high strength wicking geotextile was significant enough to keep the project moving forward.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: pp 292-301
  • Monograph Title: Proceedings of the 66th Highway Geology Symposium (HGS 2015)

Subject/Index Terms

Filing Info

  • Accession Number: 01638278
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 6 2017 8:27PM