Rock stream stability structures in the vicinity of bridges.

Details

• Creators:
  Cope, Evan D. ; Hotchkiss, Rollin H.
• Corporate Creators:
  Brigham Young University. Dept. of Civil and Environmental Engineering
• Subject/TRT Terms:
  • Streamflow
  • Scour
  • Countermeasures
  • Erosion control
  • Environmental protection
  • Aquatic life
  • Bridges
  • Riprap
• Publication/ Report Number:
  UT-15.04
• Resource Type:
  Tech Report
• Geographical Coverage:
  Utah
• Corporate Publisher:
  Utah. Dept. of Transportation
• Abstract:
  This report was sponsored by the Utah Department of Transportation (UDOT) to determine if rock stream stability structures could be used as ; scour countermeasures and to protect streambanks. Traditional scour countermeasures, such as rock riprap, are effective in minimizing erosion but may not ; provide the best aquatic habitat. UDOT is interested in finding countermeasures that are effective in minimizing erosion at design flows and also benefit ; the aquatic habitat. ; David Rosgen, a specialist in fluvial geomorphology, has developed restoration structures that are friendly for aquatic habitat and also provide ; streambank protection and stream stability. These structures are the J-Hook Vane, Cross-Vane and W-Weir. Based on the findings outlined in this report, ; Cross-Vanes and W-Weirs can help protect bridges because they will protect both sides of a streambank while also providing grade control of the ; streambed. ; For stream stability structures to withstand design flows and shear stresses experienced near bridges, they should follow the design guidelines ; specified in this report. One of the most important design guidelines is that the structures discussed in this report have an attached portion of floodplain ; where the structure meets the streambank. This portion of floodplain area can help to disperse the energy of the flow, thereby reducing shear stresses at ; abutments. ; Cross-Vanes and W-Weirs can help protect bridges and other infrastructure against scour by reducing shear stresses at piers and abutments at ; the design flood event. To further investigate their use as a scour countermeasure, it is recommended that this type structure be installed near a bridge ; following this report’s design criteria.UDOT believes that Cross-Vanes and W-Weirs should not be used as a primary scour countermeasure and that rock ; riprap (or other equivalent structural countermeasure) should be used as the primary protection for bridge foundations, abutments and piers.
  More +
• Format:
  PDF
• Funding:
  13-8480
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28860/dot_28860_DS1.pdf
• File Type:
  [PDF - 2.92 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:2cfbb0922a1bcce2c7e8c360b025faca7c58f3d6be62afa3fe1998bbe4d05ce7