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| Slab Jacking,
Slab Piers | Case Study |
Project: 115 Royal Saint Georges, Fords Colony Williamsburg,
VA
Description- The residential custom home
with settlement of the front porch slab and overlaid brick
paving system. Also, the interior crawl space and exterior
porch foundation wall have settlement and distress. A settlement
of up to 1 ½” occurred at the existing porch
slab and paving system due to the compression of sub soils.
Solution- Slab Jacking
Foundation Walls
The foundation was stabilized with Magnum 3” steel piers
with heavy-duty Magnum angle brackets. Three (3) total piers
were required.
• Average depth: 30’ deep
• Ultimate capacity: 28 Kips
• Working capacity: 14 Kips
Solution: Slab and masonry paving system
The installation of Magnum slab piers 5’ on center were
utilized to transfer slab loads to proper subsoil’s.
• Magnum Piers – 7 total
• Average depth: 18’ deep
• Ultimate capacity: 3.5 kips
Slab Jacking: After the piers were in place,
81 cubic feet of cementitious grout was injected into the
void. Grout was injected between the slab and sub soils to
consolidate the soil, fill the voids and support the slab/paver
system. A total of five working days were required to make
repairs.
Results- The paving system settlement was
corrected up to 1 ½” of lift, which returned
the paving system to its original elevation. The above methods
of repairs were less destructive and saved thousands of dollars
over typical removal and replacement methods. Upon completion
of this project, the owners contracted with Advanced Builders
to complete masonry repairs and restoration. |
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