SDOT: High bridge repair - Starting exterior carbon-fiber wrapping; continuing interior work
SDOT: High bridge repair - Starting exterior carbon-fiber wrapping; continuing interior work
Fri, 03/04/2022
information from Seattle Department of Transportation
We began wrapping the bridge’s exterior with carbon-fiber reinforced polymer on the west side of the bridge this week. The carbon-fiber wrap works together with the epoxy we are injecting into the cracks to strengthen the concrete. We will continue applying carbon-fiber wrap on the bridge’s interior and exterior in the coming weeks.
After filling cracks with epoxy, we apply carbon-fiber wrap to sections of the bridge. SDOT Photo
We also completed more preparation work for the post-tensioning system that will be used to strengthen the bridge. This prep work included drilling holes for the cables to pass through the bridge’s interior, constructing and positioning more post-tensioning components, and installing rebar for post-tensioning anchors. We’ll pour concrete to form these anchors as soon as concrete becomes available.
Inside the bridge, one of our crew members assembles a form for a post-tensioning deviator block - a concrete component that guides the post-tensioning cables throughout the bridge’s interior. SDOT photo
In the coming weeks, we’ll finish assembling scaffolding on the east platforms so that we can begin epoxy crack injection and carbon-fiber wrap work on the exterior of the east side of the bridge.
