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

Details

• Creators:
  Bloomquist, David
• Corporate Creators:
  University of Florida
• 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 most common cause of bridge failure in
  
  the United States is the scouring of sediments,
  
  which are broadly classified as cohesionless
  
  (sand and gravel) and cohesive (rock, clay, sandclay mixtures). For cohesionless sediments,
  
  predicting scour depth and erosion rates has been
  
  well studied and is fairly well
  
  understood. However, much less is
  
  known about cohesive sediments,
  
  which still require site-specific
  
  measurements to determine the
  
  relationship between erosion rate
  
  and shear stress.
  
  In this project, University of
  
  Florida researchers used the
  
  Sediment Erosion Rate Flume
  
  (SERF) to measure erosion rates
  
  of cohesive sediments. The
  
  researchers made significant
  
  improvements to SERF, including
  
  pump repairs, laser system
  
  enhancements, installation of a
  
  digital video camera, updated
  
  graphical user interface, a rebuilt
  
  pump drive, and an increased
  
  capacity filter. The new laser
  
  system permitted accurate sample leveling; the
  
  previous ultrasonic system tended to penetrate
  
  cohesive sediments and give a “false bottom
  
  reading.” The enhanced SERF led to a number of
  
  important findings.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:07cb5ed178596e0f4c5ab792ab59adcd6d2c70f3783df25b985f025e8dc4fb18
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26918/dot_26918_DS1.pdf
• File Type:
  [PDF - 649.23 KB ]