Concrete Lifting   

Magnum Piering - Helix Piers

           Project

On a much-cherished Island in the heart of Virginia Beach, a custom residence was showing signs of settlement.  Engineers were called to evaluate the problem.           

 Job Description  

During construction of the building the intermediate pilings and grade beams called for on the structural drawings were excluded.  The floating pier and footings that were installed had settlement of as much as 6”.  In addition, the right front corner of the house and masonry fireplace had 1” of settlement.  A soils investigation showed that organic peat materials existed down to a depth of 8' below grade.  This home was built on a crawl space with a height of 36”.   

Solution - Magnum Piering

Crawl Space Piering

The contractor proposed the installation of modified 60 kip duty Helix piers to replace the failed footings and piers.  The helix piers were manufactured to 24” lengths with a 12” flight to allow installation in the low crawl space.  Each girder line required 5 helix piers with an ultimate capacity of 16 kip and a working capacity of 8 kips.  Average pier depths were 14’ below grade.  After installation 60 kip wall pier caps were installed with a 12” diameter cast in place pier cap to the new 12”X10” laminated girder.  After concrete placement and a 10-day curing period the interior was lifted and loaded onto the piers, then shimmed to the correct floor beam deflections.   

Exterior Piering

Due to the affected area being supported on pilings with grade beams, a decision was made to stabilize this area with 6 Magnum Standard duty piers.  Each section was a standard 5’ length, galvanized, with a 10” and 12” diameter flight.  Each had dual cutting edges with moment-balanced blades for cutting through debris and to lesson wobble during installation. Average pier depth of 13' with ultimate capacity of 38 kips and a working capacity of 19 kips.

Contact Information

Phone: 757-546-0190

Fax: 757- 546-0318

 

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