In-situ Scour Testing Device
| 项目名称： | In-situ Scour Testing Device |
| 摘要： | The objective of this research is to prove or disprove the viability of such an in-situ scour testing device for use as a foundation design aid by the highway engineering community. The field device for the proposed study could consist of a water jet directed vertically downward into the soils that are to support the bridge pier foundations. The jet would be calibrated through physical model testing and computer simulation to produce the predicted scour depth in a sand-bed channel for the design hydraulic conditions and proposed pier geometry. The water jet would be run until equilibrium conditions are reached in the resulting scour hole, or until some maximum period of time has elapsed (such as the expected cumulative time the foundation will be exposed to the design discharge over the life of the bridge). The in-situ soils would thereby be exposed to the energy necessary to develop the scour depth, as predicted by the currently used equation. Any equilibrium or maximum scour depth resulting from a field test that is less than the predicted depth for a sand-bed channel would be attributable to the erosion-resistant characteristics of the in-situ soils. It is envisioned that this scour-testing device would be used for foundation analysis and design in a manner similar to present-day soil borings in that several tests would be conducted across the channel and floodplain area to be occupied by a proposed new or replacement bridge. The scour hole information resulting from the field test(s) would be used, in conjunction with the subsurface soil boring information, to adjust the design scour depth predicted by the equations for sand-bed channels, as appropriate, for the actual soil conditions at the bridge site. The Turner-Fairbanks Highway Research Center (TFHRC) Hydraulics Laboratory will collaborate on this proposed research and will provide Lab capabilities and technical assistance. |
| 状态： | Completed |
| 资金： | 290000 |
| 资助组织： | Colorado Department of Transportation<==>California Department of Transportation<==>Kansas Department of Transportation<==>Texas Department of Transportation<==>Utah Department of Transportation<==>Wisconsin Department of Transportation<==>North Carolina Department of Transportation<==>New York State Department of Transportation |
| 项目负责人： | Kerenyi, Kornel |
| 开始时间： | 20110701 |
| 实际结束时间： | 20130605 |
| 主题领域： | Bridges and other structures；Design；Environment；Highways |
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