Bridge Scour Analysis in New Jersey: Which Scour Factors Matter Most?

by Thomas W. Anella, Parsons Brinckerhoff, Inc, West Trenton, United States,
George R. Oliger, Parsons Brinckerhoff, Inc, West Trenton, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


This paper seeks to correlate the scour susceptibility of bridges with such observable characteristics as bridge design features, waterway characteristics, and geographic and geologic features present at highway/waterway crossings. After describing the work performed at 148 bridges in Burlington County, New Jersey, and giving a statistical breakdown of findings, the paper then applies post-project statistical analysis to such characteristics as: site geologic characteristics (mostly sandy-silt soils with occasional denser strata), type of foundation, waterway opening, history of scour problems at site, and stability of existing channel. Finally, this paper suggests guidelines for judging the relationship between site characteristics and the probability of a structure being scour susceptible. This information can be used by state or local agencies to evaluate and prioritize similar highway crossings at a preliminary level.

Subject Headings: Scour | Highway bridges | Bridge tests | Highway and road design | Bridge foundations | Bridge design | Geology | Statistics | New Jersey | United States

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