Jacked piers are deep foundation underpinning elements constructed using small-diameter steel pipes. The steel pipes are advanced to bearing depth by hydraulic jacks that are fastened to the structure being underpinned. Using the structure as the reaction load, the jack hydraulic pressure required to advance the pile is used to determine the pile capacity. In this way, each pile is essentially load tested. After reaching bearing depth, the tops of the pipes are bracketed to the structure’s footing. The finished piers effectively stop settlement and can raise the structure, closing cracks and correcting other structural flaws caused by the settlement and/or ground movement.
Contact your local Hayward Baker office for more information.