原文传递
Scour Level II Assessment of U.S. Army Installation Bridge Facility Number: BRG15 Fort Stewart, Georgia.
| 题名： | Scour Level II Assessment of U.S. Army Installation Bridge Facility Number: BRG15 Fort Stewart, Georgia. |
| 作者： | Arias-Roman, S. M.; Suazo-Davila, D. |
| 关键词： | Bridge failure, Sediment, Federal Highway Administration (FHWA) |
| 摘要： | The most common cause of bridge failure is flood scouring of the streambed material from around the structure鈥檚 foundations. Several researchers have suggested that the leading cause of bridge collapse is scour. This is the engineering term used to describe the natural process that involves the removal of sediment from around the bridge鈥檚 structure, such as abutment walls and pier columns, and from the bottom and sides of the streambed due to the flow of water. The aim of this project is to develop analytical calculations by using acquired data to determine scour depth for 100-year and 500-year events or overtopping floods. The current method implemented to predict the scour depth for U.S. Army bridges is based on the general guidelines within the Hydraulic Engineering Circulars (HECs) No.18 and No.20 recommended by the Federal Highway Administration (FHWA). Bridge scour is a combination of natural processes that involves hydrology, river hydraulics, geomorphology, and the geometry of the structures. Hence, in order to implement the current procedure, it was necessary to perform reviews of historical field channel profiles, hydrologic analysis based on rainfall events at the bridge location, hydraulics assessment based on the flood flow, and laboratory testing of soil properties. Water-surface profiles and the components of scour depths -- such as total scour, contraction scour, and pier and abutment scour -- were determined for the bridge. |
| 报告类型： | 科技报告 |
相关文献
- Rare Perennial Balduina atropurpurea (Asteraceae) at Fort Stewart, Georgia
- Research Plan To Evaluate the Relationship Between Maneuver Training Activities and Red-cockaded Woodpecker Populations and Habitats on Fort Stewart, GA; Final rept
- Water Use in the Apalachicola-Chattahoochee-Flint River Basin, Alabama, Florida, and Georgia, 2010, and Water-Use Trends, 1985–2010
- Wood-Fired Boiler System Evaluation at Fort Stewart, GA; Final rept
- Endangered Species Management Plan for Fort Hood, Texas; FY01-05; Final rept
- Surrounded by History: Memorializing Our Past, Fort Eustis and Fort Story
检索历史
应用推荐
