Drilled Piers or Drilled Shafts are a staple or standard recommendation when either the soils or the structural loads facilitate the need for Geotechnical Engineers to recommend a deep foundation solution. Though drilled piers are a great solution, there may be a better or an additional option to consider.
The other option to consider besides drilled piers is Ductile Iron Pipe (DIP) Piles. These pre-fabricated driven pile systems utilize high-strength ductile iron and can be a cost-effective and time-saving alternative to drilled piers.
Foundation Specialties Geostructural Construction (FSGC) has applied DIPs in value-engineered solutions and has seen both cost savings and schedule reduction in the following situations:
- Where the primary loads are axial and competent rock is 18-36 feet below the top of footing (TOF).
- In place of drilled piers socketed into rock for lightly loaded 1 or 2-story structures with expansive soils
- Embed within pier caps, mat slabs, or grade beams that support large axial loads and some lateral loads in soft collapsible soils.
Some of the other benefits of DIPPs include:
- No spoils are produced when driving these displacement piles
- Once piles are installed, pile caps can be poured immediately. No waiting for concrete to cure
- Can be installed in limited access areas
- Can be installed with limited overhead clearance – 25’ or greater is needed
- Manufactured with 100% recycled material
- Efficient use of material – minimal waste
- Bearing plates easily attach and are embedded into the pile cap
- Working capacities range from 25 to more than 100 tons
Give FSGC a call if you feel you may have an application where DIPs can be applied. We would be happy to review the application and provide guidance.
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