One concrete crack repair option available is a friction pier. Friction Piers consist of concrete cylinders, approximately 6” in diameter x 16” long. Holes are excavated next to the footing at intervals so that the cylinders can be pushed into the ground under the house.
A hydraulic ram is used with one end against the house footing, and the extension part pushes the concrete into the ground. Cylinders continue to be pushed into the ground until the house begins to rise. At this point, jacks are used to bring the area as level as possible, and a top block is placed on top of the last cylinder.