Investigation of erosion rates of field samples using FDOT's enhanced sediment erosion rate flume (SERF).

Details

• Creators:
  Crowley, Raphael ; Bloomquist, David ; Sheppard, D. Max
• Corporate Creators:
  University of Florida. Dept. of Civil and Coastal Engineering
• Subject/TRT Terms:
  Computer Models Erosion Control Field Tests Flumes Scour Sediments Shear Stress Testing Equipment
• Publication/ Report Number:
  BDK75 977-53
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  The first part of this project was to enhance and improve the Florida Department of Transportation’s
  
  Sediment Erosion Rate Flume (SERF) device. Notable improvements include a pump repair, laser
  
  system enhancement, installation of a digital video camera, an updated graphical user interface, a
  
  rebuilt pump drive, and a large-capacity filter. Additionally, attempts were made to install a sand
  
  injection system in the SERF, although these efforts proved unsuccessful. A computational model of
  
  the SERF was prepared using CD-adapco’s Star-CCM+. Results appeared to indicate that a
  
  conservative, smooth-wall approximation must be used to estimate shear stress when testing
  
  sediment samples in the SERF. Using these new shear stress approximation guidelines, a series of
  
  erosion tests was conducted on several sediment specimens. Results appeared to show that field
  
  specimens exhibit layering during testing. Three distinct layering events were observed and
  
  described. Results also appear to show that in addition to depth-layering, erosion functions may be
  
  governed by spatial variability. Future sampling guidelines were developed based upon these
  
  results. Finally, a dataset from the Rotating Erosion Testing Apparatus (RETA) was re-analyzed.
  
  Results appear to show a preliminary correlation between erosion rate and rock cohesion. Lastly, a
  
  new operating manual was written for the SERF device.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ce7652bdead6c24c82a6339742dc4104d1a77f3d3498987387e2c7cad09558f9
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26917/dot_26917_DS1.pdf
• File Type:
  [PDF - 6.12 MB ]