Jet Grouting Ground Modification Specialists

Schnabel stands out as a jet grouting ground modification specialist, offering unparalleled expertise in soil stabilization for clients across the United States. Their advanced jet grouting techniques are crucial for overcoming unique challenges in construction projects, aiming to enhance soil conditions for specific project goals.

Jet grouting, a key technique in Schnabel’s repertoire, is notably effective for mitigating groundwater issues in subterranean constructions. This method is also essential for strengthening existing structures’ foundations and providing necessary support during excavation activities.

As a premier jet grouting ground modification specialist, Schnabel excels in converting problematic soil into strong, cement-stabilized formations. This expertise is critical in managing groundwater and ensuring robust foundation support.

With a track record of experience and success, Schnabel has established itself as a leader in jet grouting ground modification, adept at guiding clients through complex site challenges to achieve their construction objectives with precision and competence.


Jet grouting, essential in the realm of ground modification, involves the in-situ mixing of soil with injected cement grout to create cement-stabilized soil columns. These columns significantly improve the soil’s structural integrity and reduce permeability, serving as an engineered solution for foundation support and groundwater control. Its primary applications include underpinning existing structures and constructing cutoff walls for excavation stability.

This method begins by drilling a small-diameter pipe (approximately 4 inches) to the required depth. High-pressure cement grout, usually around 6,000 psi, is then injected through this pipe. As the pipe rotates and ascends, it forms a circular column of enhanced soil. The diameter of these columns can be modified, providing adaptability in support structure. The columns can function individually for vertical support or be arranged collectively to form barriers against soil and water movement.

The adaptability of jet grouting is particularly beneficial in areas with underground utilities or other buried obstacles. Its minimal drilling requirement allows for maneuvering around these obstructions, creating larger diameter soil columns in tight spaces. This makes jet grouting an ideal solution for soil stabilization in complex underground environments. As a jet grouting ground modification specialist, Schnabel leverages this method to offer flexible and effective solutions for diverse construction challenges.


Children’s Hospital in Minneapolis

Schnabel used jet grout columns as underpinning and excavation support for the construction of an addition to the Children’s Hospital in Minneapolis, Minnesota. The jet grout columns eliminated the need for timber lagging and prevented the loss of sand during the 21-foot-deep excavation.

J Avenue Water Treatment Plant

Schnabel installed 67 jet grout columns to support the expansion of the J Avenue water treatment plant in Cedar Rapids, Iowa. This project required an excavation adjacent to an existing structure. The continuous wall of jet grout columns was successful in retaining the soil and water behind the wall and no measurable settlement of the tank structure occurred.

The Minneapolis Children’s Hospital project was Schnabel’s first application of jet grouting to underpin an existing structure in lieu of traditional hand-dug underpinning pits. The project team was very pleased with the performance of the jet grout underpinning system.

Chuck Conlon, P.E., Children's Hospital of Minneapolis


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.