Norris Cut Tunnel
United States, Canada; Nagano, Japan; Bogota, Columbia; Manila, Philippines, Australia
of tunnels and over 741,000 Feet of small diameter pipe.
CELLULAR CONCRETE FOR SHAFT AND PIPE BACKFILL
INSTALLED BY PACIFIC INTERNATIONAL GROUT COMPANY
FOR THE NORRIS CUT PROJECT IN MIAMI, FLORIDA
Pacific International Grout Company has completed installation of cellular concrete to backfill for 5,300 lined feet of 60″ Hobas pipe in the tunnel and two (2) 80 foot riser shafts. A low cost, low density cellular concrete was engineered and used to backfill both 80 foot shafts after risers were installed. The shaft backfill was engineered to produce low heat of hydration and be water resistant.
The Miami-Dade County Water and Sewer Department (MDWASD) accepted design-build pricing for the Norris Cut Force Main from Nicholson Construction for $72.1 million.
Nicholson was among the three firms selected to bid on the project out of the six who intended to prequalify.
Nicholson has been both a leader and an innovator in the geotechnical construction industry for more than 50 years.
The Miami-Dade Water and Sewer Department (MDWASD) Norris Cut 60″ Force Main/Micro-Tunnel is a design-build project consisting of 5,300 linear feet of 90-inch-diameter precast concrete tunnel, with a 60-inch diameter Hobas carrier pipe inside. Woolpert is the lead pipe design engineer on the project. Once installation was complete, the annular space between the tunnel and carrier pipe was grouted with cellular concrete.
The tunnel spans from Fisher Island to the MDWASD Central District Waste Water Treatment Plant (WWTP) on Virgina Key. The tunnel was installed 85 feet below sea level to accommodate shipping vessels through the channel