Have you ever noticed that little bump as you start over the new southbound Whilamut Passage Bridge? It’s caused by an impact panel and is intentional and vital to our bridge design.
The construction team completed building the last impact panel on the project this week, for the new northbound bridge. The impact panel is a slab of concrete, about 20 feet wide, that serves as the transition from the roadway onto the bridge structure. The point where the panel meets the bridge is designed to expand or contract in response to temperature, vibration or seismic activity with the use of an expansion joint that allows carefully controlled movement.
Last week, crews formed the steel reinforcement and poured the cast-in-place slab of concrete which, combined with the expansion joint, make up the impact panel.
 |
| Crews use the Bid-Well machine to spread and level the new concrete for the impact panel. |
This week, workers will install railing and barriers alongside this section of the roadway. The team will cover the concrete impact panel with black asphalt paving this spring when the roadway and deck are finished.
Tidak ada komentar:
Posting Komentar