Design guidelines for horizontal drains used for slope stabilization.

Details

• Creators:
  Pohll, Greg M. ; Carroll, Rosemary W.H. ; Reeves, Donald M. ; Parashar, Rishi ; Muhunthan, Balasingam ; Thiyagarjah, Sutharsan ; Badger, Tom ; Lowell, Steve ; Willoughby, Kim A.
• Corporate Creators:
  University of Nevada System. Desert Research Institute
• Subject/TRT Terms:
  • Slope stability
  • Slope failure
  • Horizontal drains
  • Subsurface drainage
  • Shear strength
  • Geotechnical engineering
  • Fractured rock
  • Groundwater
  • Hydrogeology
  • Rotational landslides
  More +
• Publication/ Report Number:
  WA-RD 787.1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Washington
• Corporate Publisher:
  Washington (State). Dept. of Transportation. Office of Research and Library Services
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Soils and Geology
• Abstract:
  The presence of water is one of the most critical factors contributing to the instability of hillslopes. A common ; solution to stabilize hillslopes is installation of horizontal drains to decrease the elevation of the water table ; surface. Lowering the water table dries a large portion of the hillslope which increases the shear strength of the ; soil, thereby decreasing the probability of slope failure The purpose of this manual is to provide a single ; comprehensive reference for geotechnical engineers and hydrogeologists on designing horizontal drainage ; systems to improve slope stability. Guidelines are provided for translational and rotational failure and consider ; fractured systems. Basics of hydrogeologic and geotechnical terminology, site characterization and ; conceptualization, groundwater modeling techniques and template projects help to guide the user with respect ; to identifying important parameters to drainage design. An iterative approach is presented for determining the ; minimum drain construction to lower water levels enough to keep the factor of safety (FOS) greater than 1.2.
• Format:
  PDF
• Funding:
  GCA6381
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25843/dot_25843_DS1.pdf
• File Type:
  [PDF - 17.44 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:10c9b09bab5aed9c0453456355dec5827fa351fc71a7edcf0239d92f716b06e562eff74fe340b21111c9abf2cd6189cbeee3000352a59cf09e150fe58327a74b