Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)
Emergency spill basin (patent pending)
H.C.M. Breek & H.C. v/d Waal
The spill tube, spin off from a large diameter bored pile, with a diameter up to 5 meters, constructed in either steel or concrete, is installed in the ground to a depth of over 60 meters by means of an hydraulically operated cutter. During the installation the casing is, up to grade level, filled with water or a water-bentonite mixture. A water-betonite mixture also flows along the outside of the casing, reducing the friction between the casing and the soil during installation. Following installation, which is a 100% vibration free operation, to the required depth, a concrete floor is poured at the bottom of the casing. At the outside of the casing, the water-bentonite mixture is replaced by cement grout. After the concrete and grout is sufficiently cured, the inside of the casing is pumped dry and the casing is furnished with fire-extinguishing installations, suction pipes etc.
|article #796; publication #36 (IC-1994)|