United States Department of Transportation
i
Allowable Limit Contraction and Abutment Scour at Bridges [Project Summary]
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2018-08-31
[PDF-491.43 KB]
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Alternative Title:0-6935: Allowable Limit Contraction and Abutment Scour at Bridges [Project Summary]
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Abstract:Existing guidelines for maximum allowable scour are applicable only to piers since they are based on the stability criteria of the bridge foundations. An additional criterion must be considered when limiting scour at abutments where scour may also affect the stability of the approach embankment. Scour at spill-through abutments can cause slope stability failure of the embankment before reaching the depth endangering the foundations. This project proposed practical guidelines for determining the maximum allowable scour depth at or near spill-through abutments. This research primarily observed geotechnical failures of abutment embankments at multiple bridge sites in Texas.
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