After purchasing this home in Diamond Bar, CA a new homeowner found himself looking at cracks all over his backyard with several large cracks running parallel with a massive slope that the home sits on. His first call was to an engineer who recommend he find a foundation repair contractor because there were only two options for this pool and backyard… either tear out and replace everything, or install piers to address the incompetent soils and lateral movement. With a soil report in hand the homeowner called the Dalinghaus Construction team to inspect the property and design a repair plan.
Project Design Phase
Having been familiar with several properties with similia slope conditions in this neighborhood, the owner called us to come out to the home and evaluate the site conditions. During the evaluation Joe and Phil found that the pool had settled over an inch on the side adjacent to the slope. They needed to design a repair plan that properly addressed the settling while also being sure to address the lateral movement the pool was expe1rencing towards the slope.
With the help of Helfrich and Associates, Joe and Phil designed a repair plan consisting of the installation of 23 TAF288 vertical helical piers and 4 TAF150 helical tiebacks around the perimeter of the pool and along the hillside. The piles and tiebacks would be both embedded into the new grade beams and mounted to the footings around the pool to lift the areas that had settled and stabilize the area from future movement. The methodology for the design was to create a structurally sound solution to the slope’s previous unsupported crepe characteristics.
Dalinghaus Construction was able to successfully install the 23 piles and 4 tiebacks with the help of two crews in a single phase to help solidify the hillside. The project was installed utilizing our hand held installation equipment. The piles were installed to an average depth of 28′ and the tiebacks to an average depth of 22′.