Hawaii Operations
Pacific Foundation PDX Airport

Pacific Foundation is a Vancouver, Washington-based company specializing in
ground improvement, drilled foundation and shoring solutions. 

Contact Us

📞(360) 200-6608


Request a Quote

Grant Street Pier

We have successfully estimated, managed and constructed over $200 Million in ground improvement, foundation and shoring projects in Washington, Oregon, Idaho, California, and Hawaii. We service a variety of industries including:

Secant and Tangent Pile Walls

Secant and Tangent Pile Walls

Secant piles are a series of overlapping concrete piles capable of providing earth shoring and water-tight cutoff walls. They can be installed in nearly any condition using a variety of drilling methods, but are most efficient and effective when constructed using CFA or conventional casing systems. 

Tangent piles are similar, with the exception that instead of overlapping, the piles merely touch. While they do not offer the water-tightness of secant piles, they do provide a very robust shoring system in difficult conditions, particularly when tiebacks cannot be used due to site logistics and easement limitations. 

Our personnel have installed secant pile walls for a wide variety of purposes to depths of up to 140 feet. 
Our capabilities include: 

  • Design of permanent and temporary secant pile wall systems
  • Use of CFA methods to provide high production secant pile construction
  • Use of sectional and single stroke casing for maximum verticality
  • Use of casing spotter systems and guidewalls to ensure horizontal alignment
  • Pile installation in stilts, gravels, saturated soft soil, bedrock and obstructed conditions
  • Pile diameters ranging between 24 and 48 inches 
  • Use of torque multipliers and oscillators to install and extract casing
  • Design of cutting shoes to allow advancement not only through concrete, but also rock
  • Circular unreinforced secant pile walls for jacking pits and utility structures
  • Reinforced and braced secant and tangent pile walls

For the most Challenging Projects

Pacific Foundation is equipped to tackle the most challenging projects, on schedule and on budget, every time.  Enter your email address below to learn more about our design-build and portfolio of geotechnical construction solutions. 


You May Also Like

These Stories on Earth Retention & Shoring