High Quality H₂O, Utilizing Horizontal Drains for Landslide Stabilization

Utilizing horizontal drains for landslides is a relatively new concept in the geotechnical field. Thousands of horizontal drains have been installed throughout the nation and the world, yet a good number of engineers and geologists have limited to no experience with this method for landslide stabilization. This was the case for WYDOT in 2009 when several key factors forced it to take a hard look at horizontal drains to help stabilize landslides. Since 2010, WYDOT has installed horizontal drains on 6 different landslides, primarily on the Togwotee Pass Corridor near Yellowstone National Park, but most recently west of Buffalo, Wyoming at the Caribou Landslide. Most drain sights have been a success, with only a few showing poor performance, but all sites presented distinct challenges from design and construction to the completed product. Design concepts of horizontal drains are relatively simple and straight forward, yet the nature of each landslide and subsequent placement of drain pad sites is critical for a successful product. WYDOT Geology faced a significant challenge to attempt to stabilize several key landslides with numerous constraints. The new concept of utilizing horizontal drains provided additional factors of safety and proved to be worthwhile, from slide stabilization to dollars saved. So much so, horizontal drains are being considered to be incorporated into three more upcoming landslide contracts. Regardless of whether horizontal drains are utilized in any of these landslides, WYDOT Geology now has the experience and a sound track record to justify use of this method of slide stabilization for projects in the future.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 34-53
  • Monograph Title: Proceedings of the 66th Highway Geology Symposium (HGS 2015)

Subject/Index Terms

Filing Info

  • Accession Number: 01638295
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 21 2017 5:16PM