Foundation Settlement Maryland – The Challenge:
The chimney is the heaviest portion of the home, which means there’s a lot of weight concentrated in a small space. If the foundation is not stable or the soil the foundation sits on is unstable the chimney will start to lean. In the case of this Maryland home, the weight of the chimney exceeded the weight of the underlying soil, causing the chimney to completely detach from the home.
Foundation Settlement Maryland – The Solution:
To permanently stabilize the chimney, JES excavated the soil from the chimney and installed two push piers to permanently stabilize the chimney. The piers were installed using hydraulic cylinders that drove the steel push piers down to load bearing strata. The piers were driven to a depth of 27 feet from the top of the pier. At each pier location, the foundation is excavated to expose the foundation footing. During installation, heavy duty steel foundation brackets were secured into foundation footings. Galvanized steel pier sections were hydraulically driven through the bracket to competent soils. The weight of the chimney was then carefully transferred from unstable soil conditions through the piers onto load bearing strata, resulting in the permanent stabilization of the chimney.
Foundation Settlement Maryland – Project Summary:
The installation of a 288-push pier was the preferred product for the repair because of its ability to load test the condition of the pier during the installation. Pier systems were installed by first notching the footing and installing a strong steel bracket. The bracket was slid under the footing and secured in place to secure the steel drive chassis. The chassis was used to guide galvanized steel pier sections into the soil. The driven pressure of each 3 foot pier section was documented for its drive pressure and seated with a 1 ½” male/female connection to prevent separation during the installation, completely stabilizing the chimney. The push pier system is installed with a lifetime warranty.
Project Engineer: Scott Davis P.E.
Project Designer: Christian Tesi
Installation Supervisor: Donald Hoffman