Roughening the existing interior concrete allows for a stronger bond between the new and existing concrete.
Photo courtesy SDOT
Fri, 02/18/2022
information from Seattle Department of Transportation
We had another busy week continuing epoxy crack injection and radar scanning inside the bridge, as well as preparing for future post-tensioning. This prep work involves roughening the concrete surfaces inside the bridge, which strengthens the bond between new and existing concrete. It also includes building the components inside the bridge that anchor the post-tensioning cables spanning the length of the bridge
We also completed setup for the next phase of core drilling this week, which will require drilling through as much as 17 feet of concrete so new post-tensioning cables can pass through the interior of the bridge to provide added strength.
Crews access the work platforms on the underside of the bridge using a caged ladder. SDOT Photo
The scaffolding we installed on the work platforms will allow crews to complete epoxy crack injection and carbon-fiber wrap work on the bridge’s exterior. SDOT Photo
Next week, we’ll continue assembling scaffolding on the east work platforms so we can begin exterior epoxy crack injection and carbon-fiber wrapping on that side of the bridge.
