Unknown foundation determination for scour.

Details

• Creators:
  Briaud, Jean-Louis ; Medina-Cetina, Zenon ; Hurlebaus, Stefan ; Everett, Mark ; Tucker, Stacey ; Yousefpour, Negin ; Arjwech, Rungroj
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  Bridges Deterioration By Environmental Action Foundation Soils Scour Scour At Bridges--Texas
• Publication/ Report Number:
  FHWA/TX-12/0-6604-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; Oct. 2011-Apr. 2012.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  Unknown foundations affect about 9,000 bridges in Texas. For bridges over rivers, this creates a problem
  
  regarding scour decisions as the calculated scour depth cannot be compared to the foundation depth, and a
  
  very conservative costly approach must be taken. The objective was to develop a global approach, which
  
  will reduce significantly the level of uncertainty associated with unknown foundations. This approach was
  
  developed in two parts: a data mining and inference approach where no testing at the site was necessary, and
  
  a testing approach where new tests for unknown foundations were used. The data mining and inference task
  
  made use of existing data such as soil type, known foundations on neighboring bridges, design practice, and
  
  the age of the bridge to infer the type and length of unknown foundation elements. The testing task consisted
  
  of developing two geophysical techniques, resistivity and induced polarization imaging, to obtain a picture of
  
  the soil and foundation below the surface level or river bottom. The outcome was a global framework in
  
  which one of the approaches or any combination thereof, as well as the most useful current techniques
  
  (nondestructive testing methods if necessary), can be used to decrease dramatically the uncertainty associated
  
  with the unknown foundation. The inference process was trained by using bridges where the foundation was
  
  known and verified by comparison against case histories. The two testing techniques mentioned above were
  
  tested at the National Geotechnical Testing Site on Texas A&M's Riverside campus and then against
  
  full-scale bridges selected in cooperation with TxDOT.
  
  
• Format:
  PDF
• Funding:
  Project 0-6604
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9cd51bbb2c6c1097124a48bf8f38708bd0736cdcd1e24f470f5e98ddce896c8c9c7712da747559be3be772490ad0d7286bd98f76478b0273a29d158e0a4894ef
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24257/dot_24257_DS1.pdf
• File Type:
  [PDF - 24.26 MB ]