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National Bridge Scour Program - measuring scour of the streambed at highway bridges
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mueller, David S. |
| Copyright Year | 2000 |
| Abstract | Scour or erosion of the streambcd and banks near the foundations (piers and abutments) of a bridge is often referred to as "bridge scour." The traveling public gives little thought to the foundations of the bridges they cross. This is a credit to the bridge engineers; however, designing the foundations of a bridge over a stream is not as simple as it may seem. Bridges are static structures constructed in a dynamic river environment. Rivers adjust their boundaries (bed and banks) to efficiently transport water and sediment. Some of these adjustments are a direct consequence of the construction of the bridge and others are independent of the bridge, but both may have significant impacts on the bridge. Changes in streambed elevation and stream planform due to natural or human-induced causes can affect the reach of the river near the bridge. These changes may occur slowly over many years or may be catastrophic, occurring during a single flood. These changes occur independent of the bridge but can severely affect the stability of the bridge foundations (fig. 1). During a flood, water is transported in the river channel and spills out into the floodplain. When a roadway and bridge are constructed to cross a stream, the embankments used to elevate the roadway above the floodplain stop the downstream flow of water in the floodplain and force the flow through the bridge opening. When floodplain flow is forced through the bridge, the flow velocity increases, |
| File Format | PDF HTM / HTML |
| DOI | 10.3133/fs10700 |
| Alternate Webpage(s) | https://pubs.usgs.gov/fs/2000/0107/report.pdf |
| Alternate Webpage(s) | https://doi.org/10.3133/fs10700 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
