| Title | Pier scour in clear-water conditions with non-uniform bed materials |
|---|---|
| Record ID | 46077 |
| Personal Name Creator |
Guo, Junke; Suaznabar, Oscar; Shan, Haoyin; Shen, Jerry |
| Corporate Creator | Genex Systems, LLC; University of Nebraska--Lincoln. Dept. of Civil Engineering |
| Corporate Contributor |
United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development |
| Publisher | Turner-Fairbank Highway Research Center |
| Publication Date | 20120500 |
| Language | English |
| Abstract | Pier scour design in the United States is currently accomplished through application of the Colorado State University (CSU) equation. Since the Federal Highway Administration recommended the CSU equation in 2001, substantial advances have been made in the understanding of pier scour processes. This report explains a new formulation for describing scour processes and proposes a new equation for pier scour design. A critical review of selected studies is summarized. A simplified scour mechanism is proposed in terms of a pressure gradient resulting from the flowstructure, flow-sediment, and sediment-structure interactions. An equilibrium scour depth equation is proposed based on this understanding of the scour mechanism and is validated and refined by a combination of laboratory and field data. The proposed equation is primarily applicable to clear-water scour conditions with non-uniform coarse bed materials. |
| Rosap ID | dot:24982 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/24982 |
| TRT Terms | Scour; Deterioration by environmental action; Sediments; Bridge piers; Structural piers |
| General Subjects | Bridge scour; CSU equation; Hager number; Local scour; Pier scour; Sediment mixtures; Non-uniform bed material; Coarse bed materials |
| Classification | NTL - HIGHWAY/ROAD TRANSPORTATION - Bridges and Structures; NTL - HIGHWAY/ROAD TRANSPORTATION - Soils and Geology |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1376240 |
| Contract Number | DTFH61-11-D-00010 |
| Report Number | FHWA-HRT-12-022 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/46000/46000/46077/Pier_scour_in_clear-water_conditions.pdf |
| Format | |
| Database | NTL Digital Repository |