The installation of pipe canopy on the west portal will be going on until mid January, 2011. The pipe canopy will support the earth above the tunnel during the first 190 feet of excavation.
The next step will be tunnel excavation of the west portal. The tunneling machinery at the West Keep reading >>
By: Brendan NeeWhat’s it like to work on a $400 million project in California, removing tons of rock and debris along more than 3,300 feet? Watch the Caldecott Tunnel fourth bore construction crew and the 130-ton, 54-foot-long roadheader hard at work in the following Caltrans video:
For more videos, visit the YouTube Keep reading >>
By: Trucy Phan
The giant roadheader made a small ceremonial cut Aug. 8 for a public event, but it had to back out and wait for crews to use torches and other tools to cut out metal reinforcement embedded into the hill to stabilize the east portal of the tunnel.
The giant roadheader, Keep reading >>
By: Brendan Nee
The wall shown in the photos below will eventually become the east portal wall. According to Caldecott-tunnel.org, most walls are built from the base upwards.
First, an auger drills large holes, ninety feet deep and several feet apart. Concrete is poured into the circular holes and allowed to harden. Keep reading >>
By: Brendan Nee
A giant roadheader, which was built in Northeastern Germany, was shipped to Oakland and assembled at the east portal of the Caldecott Tunnel. There are several weeks worth of work that must happen before the excavation can begin. According to Caldecott-tunnel.org, the $3.5 million dollar machine weighs 130 tons Keep reading >>
By: Brendan Nee