Piling Division : Micro Jetted Hollow Bar Pilings
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These piles are unique in that the equipment required for installation is much less intrusive; and there is no driving to disturb the neighbor; damage nearby existing structures; or require expensive vibration monitoring during pile installation. This type of pile can achieve high loads in low overhead, and confined spaces; such as inside existing buildings, and behind homes were a large pile rig cannot gain access. Also, there are no spoils to remove from the site, only the excess grout overflow need be removed.
Pile diameters typically range from approximately 3 inches to 9 inches determined by the bit size used for drilling the pile, loads required, and the soils encountered. Different bit designs can be used to install through sands, or create rock sockets by using the percussion ability of the drill. Depths in excess of 100 feet have been attained utilizing these methods, with working loads in excess of fifty (50) tons (higher loads can be achieved depending on the project requirements).
Installation involves drilling a hollow drill rod and drill bit to the cut off elevation while injecting grout during the installation. In this method the bar and bit are left to act as the reinforcing steel for the pile. This process can be utilized for tieback anchors (ie. Seawalls, and retaining walls), uplift anchors, as well as, compression piles.
