Pilot Knob Water Tank Construction


The above photo was taken at the Pilot Knob Water Tank Site. It shows a 30" x 30" Waterline Tee being installed for the new 10.0 Million Gallon Water Tank.	The site for the Pilot Knob Water Tank is shown above. J & H Construction of Cookeville is the contractor for the site preparation work. Photo taken on June 11, 2001.

Workers from the Crom Corporation are shown placing steel for the Pilot Knob Water Tank base. This photo was taken on July 2, 2001.	1,092 tons of concrete are shown being poured to make the base of the tank in the photo above. IMC supplied the concrete. Photo taken July 10, 2001.

Scaffolding is shown being put in place. Photo taken July 31, 2001.	The metal diaphram is shown being put around the tank. The steel shell extends continously the full height of the tank to insure watertightness. To avoid joint sealing problems, no horizontal splices are allowed in the diaphragm. Vertical joints in the steel shell panels are sealed watertight by epoxy injection. Photo taken August 28, 2001.

Shotcrete (pneumatically placed concrete) is shown being sprayed on the outside tank walls. Photo taken October 1, 2001.	The photo above shows how the concrete is being applied by using a spray technique called Shotcrete. Photo taken October 1, 2001.

Shotcrete is shown being sprayed on the inside tank walls. Picture taken October 23, 2001.	The dome roof is constructed of cast-in-place concrete. The dome for tank was poured on November 13, 2001.

The above photo shows a worker from The Crom Corporation leveling the concrete on the dome of the tank. Photo taken November 13, 2001.	Carey O'Neill of the Water Department is shown atop the tank as concrete is being poured in the background using the pumpcrete method. Photo taken November 13, 2001.

The steel wire is shown being applied around the tank in the photo above. The tank wall is circumferentially prestressed using high strength steel wire wrapped around the tank in a continuous helix. The tension in the wire is measured to within 2% of accuracy. Wall prestressing is designed to carry the tanks hydraulic load. Photo taken December 5, 2001.	A shotcrete coat is shown being placed over the wire to permanently bond the wire to the tank wall. The steel wire and concrete is placed on the tank in layers.