Secant Pile Installation 

Schnabel, a renowned nationwide design-build company, brings decades of expertise in constructing reliable and structurally sound secant pile walls. These walls serve a dual purpose by offering effective excavation support and acting as formidable groundwater barriers.

Our team utilizes specialized drills to ensure precise alignment and optimal performance of the secant pile walls. Ranging from 2 to 4 feet in diameter, the overlapping shafts form a continuous concrete wall, while tangent piles provide a similar function with touching, non-overlapping shafts.

Trust Schnabel to deliver tailored earth- and water-retention solutions through our exceptional secant wall construction, enabling you to conquer even the most challenging construction goals.

Secant Pile Installation Solutions

Secant pile walls are a robust and rigid system expertly implemented by Schnabel to provide unmatched earth retention and groundwater cut-off capabilities. Our skilled team constructs these walls by drilling a series of alternating primary and secondary shafts, meticulously overlapping to form an unbroken secant wall.

The concrete in the shafts can be all low-strength, all high-strength, or a combination of both, with steel piles or reinforcing steel frequently incorporated in the secondary shafts. In cases where self-supporting circular rings are required, unreinforced high-strength shafts are skillfully employed, such as those commonly used for tunnel access shafts.

Schnabel’s high torque drill rigs showcase their prowess by penetrating challenging drilling conditions, while simultaneously casing the drill hole. This allows for seamless advancement through various obstructions, including cobbles, boulders, and even reinforced concrete. The impermeable nature of secant pile walls makes them highly effective in controlling groundwater flow into excavations, while their exceptional stiffness renders them ideal for safeguarding sensitive structures located behind the walls.

Explore the advantage of Schnabel’s expertise and comprehensive secant pile installation services to ensure the success of your project.

In situations where difficult drilling conditions are anticipated, secant pile walls emerge as a remarkably economical choice for cutoff wall construction. Apart from their cost-effectiveness, another significant benefit lies in the relatively low mobilization cost when compared to alternative cutoff wall types, such as slurry walls and soil mix walls.

Schnabel, with its extensive experience and expertise, can guide you through the decision-making process to determine if a secant wall is the optimal solution for your project. With eight regional offices conveniently located, reaching out to Schnabel becomes effortless.

Discover the numerous advantages of secant pile installation, ranging from its exceptional performance in challenging drilling conditions to its budget-friendly nature. Contact us today to unlock the potential of secant walls for your construction endeavors.

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secant pile contractors

Rondout West Branch Bypass Tunnel Shaft

Schnabel installed secant piles in a self-supporting circular ring to support the construction of a new bypass tunnel to allow water to flow under the Hudson River to New York City after an older tunnel started to leak.

secant piles

Barnes-Jewish Hospital

Schnabel designed and constructed a secant pile wall for the Barnes-Jewish Hospital Parkview Tower on the Washington University Medical Campus in St. Louis, Missouri. The perimeter secant wall served as both the permanent structural basement wall and the temporary earth-retention system for the new hospital building.

In 31 years of building deep foundation projects for Schnabel, building a 90’ deep reinforced circular shaft was one that was very challenging and deeply rewarding. Looking forward to working on the next one with our client Schiavone.
Paul Davis, Rondout West Branch Bypass Tunnel Shaft


Schnabel is the sector’s most operationally efficient Geostructural Design & Construction contractor. We optimize efficiencies by leveraging decades of experience and design/build expertise to innovate processes and approaches that are consistently proven to deliver optimal outcomes for our clients.