BAUER Foundation Applications: Choosing the Right Method for the Job

Every foundation project begins with the same challenge: selecting the right construction method for the ground conditions, structural requirements, and project schedule.

While many drilling rigs are designed to perform a limited range of tasks, BAUER has spent decades developing purpose-built applications that allow contractors to adapt to changing conditions without compromising productivity. From drilled shafts and Continuous Flight Auger (CFA) piles to Full Displacement Piles (FDP) and advanced soil mixing methods, BAUER offers one of the industry's broadest application portfolios.

This blog series explores the most common BAUER foundation applications used throughout North America, explaining how each method works, where it performs best, and why selecting the right application can improve productivity, reduce costs, and expand project capabilities.

Insights throughout the series are informed by Gordian Ulrich, ECA Vice President of BAUER Product Sales & Service, whose decades of field experience help contractors understand not only the equipment, but the engineering principles behind each application.

Why Applications Matter

No single drilling method is the right solution for every project.

Ground conditions, groundwater, production requirements, environmental constraints, and structural design all influence which application delivers the best results.

One of BAUER's greatest strengths is its ability to offer specialized solutions for nearly every foundation challenge. Rather than adapting one machine to perform every task, BAUER has developed application-specific methods that maximize efficiency while maintaining the flexibility contractors need on today's job sites.

ECA helps customers evaluate those factors and determine which approach will deliver the greatest value for their project.

Kelly Drilling

Best suited for:

• Drilled shafts 
• Caissons  
• Cased drilling 
• Difficult or changing ground conditions 

Kelly drilling is the foundation of every BAUER BG rotary drilling rig. Designed around high torque, powerful winches, and precise crowd force, it remains the most versatile drilling method available for deep foundation construction.

When projects require maximum flexibility and precise bore control, Kelly drilling continues to set the industry standard.

Read next: Kelly Drilling Explained: Why BAUER Delivers Superior Torque, Control and Versatility

Continuous Flight Auger (CFA)

Best suited for:

• High-production piling 
• Uniform soil conditions 
• Large commercial foundation projects 

CFA drilling focuses on production. By eliminating casing installation and minimizing spoil handling, contractors can install piles quickly and efficiently while maintaining consistent quality.

BAUER's high-torque rotary rigs extend the capabilities of CFA beyond traditional limits, allowing deeper drilling and greater flexibility than many competing systems.

Read next: CFA Drilling Explained: When BAUER Delivers Maximum Production

Full Displacement Piles (FDP)

Best suited for:

• Displaceable soils 
• Urban construction 
• Vibration-sensitive projects 
• Reduced spoil requirements 

Rather than excavating soil, FDP tooling displaces and densifies the surrounding material, increasing shaft friction while significantly reducing spoil generation.

The result is a productive, environmentally friendly installation method that has become increasingly popular for commercial and infrastructure projects.

Read next: Full Displacement Piles (FDP): Vibration-Free Foundation Solutions with BAUER

Soil Mixing

Best suited for:

• Weak ground improvement 
• Groundwater control 
• Excavation support 
• Environmental containment 

Soil Mixing improves the ground itself by blending native soils with cement slurry to create a stronger, more stable mass.

BAUER offers multiple soil mixing applications including SCM, SCM-DH, CSM, and MSM, allowing contractors to match the technology to site-specific soil conditions and project requirements.

Rather than relying on one approach, BAUER provides specialized solutions for a wide range of ground improvement challenges.

Read next: Soil Mixing Applications Explained: How BAUER Improves Ground Conditions

Cased Continuous Flight Auger (CCFA)

Best suited for:

• Secant pile walls
• Projects requiring improved verticality
• Cased single-pass drilling
• Challenging ground conditions

Cased Continuous Flight Auger (CCFA) drilling builds on the productivity of conventional CFA by advancing a casing around the continuous flight auger. The casing creates a more rigid drill string, helping contractors maintain verticality while providing greater control in demanding ground conditions.

CCFA is particularly well suited for secant pile walls, where maintaining pile alignment and overlap from top to bottom is critical. Modern BAUER rigs combine high torque, substantial pullback and increased stability to extend the method into deeper piles and more challenging soils than earlier CCFA systems could handle.

Read next: Cased Continuous Flight Auger Drilling: Where CCFA Fits in Foundation Construction