CFA / Auger Cast Piles
CFA piles, also called auger cast piles, provide drilled, cast-in-place support with low vibration where ground conditions and site logistics support continuous installation.
Pacific Foundation installs CFA foundations on tight urban sites and in low-clearance settings, bringing deep foundation construction into spaces that limit equipment access.
Drilling and Grout in a Single Stroke
Auger cast piles—also called continuous flight auger (CFA) or augered cast-in-place (ACIP) piles—are formed with a hollow-stem continuous flight auger. Concrete or grout is pumped through the stem as the auger withdraws, and reinforcement is placed while the material is fresh. The method supports fast, repeatable installation with low vibration and no conventional open borehole.
Pacific Foundation has installed CFA piles on hundreds of projects across commercial, housing, healthcare, institutional, industrial, utility, water and wastewater, and infrastructure work.
Use auger cast piles where continuous production fits the site
Auger cast piles are often selected when a project needs repeated deep foundation support without the vibration profile of driven piles. They are especially useful where production, access, and foundation sequencing need to stay coordinated.
Building foundations
Repeated pile elements for commercial, residential, institutional, industrial, and public works structures.
CFA soldier piles
Excavation support where the design, soil profile, and access support auger installation.
Vibration-sensitive sites
Work near existing structures, utilities, public corridors, or occupied facilities.
Variable ground
Sites where the crew has to read drilling response and keep placement continuous.
Urban access
Infill, campus, utility, and treatment plant work where production has to fit the site.
Fast sequencing
Foundation packages where pile installation has to keep pace with the next phase.
Match the rig, tooling, and pump setup to the ground
CFA installation depends on soil conditions, auger tooling, working-platform capacity, spoil handling, pump location, material continuity, reinforcement timing, and access. Pacific reviews those controls before production starts.
Bauer BG 33 H
Heavy vertical drill rig used for CFA tooling, drilled foundation work, and production pile installation where pile size, access, and sequencing need coordinated field control.
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Bauer BG 24 H
The Bauer BG 24 H is a mid-size H-kinematics vertical drill rig for drilled foundation and shoring work.
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Bauer BG 46/55 V #3490
The Bauer BG 46/55 V is a heavy vertical drill platform for large-hole and specialty foundation drilling.
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Bauer BG 15 H #3061
The Bauer BG 15 H is a compact foundation rig configured for drilling on constrained sites.
View equipmentCross-Market Experience
Deep field experience across buildings, active facilities, industrial sites, utilities, treatment plants, shoring scopes, and infrastructure work.
Portland, OREGON / General Civil Julia West House
Pacific Foundation installed soldier piles, CFA shafts, lagging, and tiebacks for Julia West House on a constrained downtown Portland site.
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Longview, WA / Water & Wastewater Treatment Three Rivers WWTP
Pacific Foundation installed CFA shafts for the Three Rivers Wastewater Treatment Plant upgrades using a BG 33 drill and supporting crane.
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Corvallis, OR / Stadiums & Arenas OSU Reser Stadium
Pacific Foundation drilled conventional and CFA shafts, including low-clearance work with a Bauer BG12H; built a tied-back soldier-pile wall for excavation support; and designed and installed micropiles to underpin...
View projectAuger Cast Pile Planning Questions
How do CFA and auger cast relate?
CFA describes the continuous flight auger installation method. Auger cast or augered cast-in-place describes the pile formed as concrete or grout is placed during auger withdrawal.
When does Pacific recommend auger cast piles?
Pacific recommends CFA when the project needs repeated drilled elements, reduced vibration, and production installation without an unsupported open hole. The ground still has to support continuous drilling and placement.
What conditions can make CFA a poor fit?
Dense gravel, cobbles, obstructions, difficult reinforcement, interrupted material supply, or access that prevents steady production can push the work toward another foundation method.
Can CFA be used for shoring?
Yes. CFA-installed soldier piles can be used for excavation support when the design, ground conditions, access, and installation sequence support the method.
What should we send for pricing?
Send the plans, pile schedule, geotechnical report, load requirements, access constraints, clearance limits, and testing requirements. Pacific can price a defined CFA scope or flag method-fit risks.
Review the pile scope before production is set
Send the plans, pile layout, geotechnical report, and schedule. Include access, material delivery, reinforcement, and testing so Pacific can review the production sequence before mobilization.