Abstract: An apparatus for lifting and stabilizing a structural slab overlying the ground includes a base attached to the upper surface of the slab, at least one hydraulic cylinder vertically supported from the base and a slip clamp assembly attached to the piston rod extending from the cylinder. Piling segments are sequentially passed downward through the slip clamp and through coaxial holes in the base and in the slab, and are driven into the ground by the hydraulic cylinder to form a support column under the slab.

Abstract: Apparatus and method for supporting and lifting building foundation slabs utilizing an above-slab, power cylinder activated, lift assembly and a below-slab support bracket. The bracket is an elongated plate which is inserted through a small access slot cut in the slab and then rotated to extend transversely of the slot. Lift rods are connected between the bracket and a cross arm of the lift assembly positioned above the slab. The cross arm and the bracket include apertured guides for slidably receiving and guiding pilings successively driven under the slab by power cylinders connected from the cross arm.

Abstract: Apparatus for stabilizing and elevating the foundations of buildings of the type utilizing a foundation bracket which is positioned in supporting engagement with the building foundation. The apparatus includes a tubular guide sleeve and an upper head assembly from which one or more power cylinders are supported with their piston rods extending downwardly along side piling pipe sections which are driven into the ground through the guide sleeve adjacent to the foundation to form a support column. The piston rods are connected to a slip clamp which is constructed and arranged to grip a piling section and push it downwardly upon the downward, maximum power extension stroke of the piston rods, and to release the piling upon the upward, retraction stroke of the piston rods. Vertically extending connecting rods which support the upper head assembly are detachably connected at their lower ends to a lower cross arm unit attached to the foundation bracket.