Check out these photos of the Bay Tunnel work done to place the rebar and frame of what will be the “plug” of the Ravenswood shaft.
Diver coming out of the bottom of the shaft after
cleaning walls and checking invert elevations
cleaning walls and checking invert elevations
Rigging rebar mat and frame to place on shaft invert
Crane hooked to rebar mat and frame
Lowering rebar and frame in shaft. Concrete vibrator used
to consolidate concrete during concrete placement.
to consolidate concrete during concrete placement.
Lowering rebar and frame in shaft. Look at the four concrete
vibrators used to consolidate concrete during concrete placement.
vibrators used to consolidate concrete during concrete placement.
Mat and frame under water.
Four workers lowering air line tubs to vibrators.
Four workers lowering air line tubs to vibrators.
Diver going in to check line and grade of the rear mat and frame after reaching bottom. Once they verify location of mat and frame is in compliance, diver will unhook rigging to the mat and frame.
