Reinforced Jet Grouting Excavation Services

Schnabel is distinguished in the construction industry for its jet grouting ground reinforcement services, providing exceptional soil stabilization solutions across the United States. Their expertise in jet grouting is essential for addressing unique construction challenges, enhancing soil properties to meet the specific needs of various projects.

Jet grouting, a prominent service offered by Schnabel, is highly effective in reducing groundwater infiltration in underground structures. This technique is also invaluable for reinforcing the foundations of existing buildings and offering critical support during excavation processes.

As an expert in jet grouting ground reinforcement services, Schnabel specializes in transforming weak soil into durable, cement-stabilized structures. This capability is crucial for effective groundwater control and ensuring strong foundation support.

With a history of success and innovation, Schnabel has cemented its position as a leader in jet grouting ground reinforcement, adeptly helping clients overcome intricate construction site challenges and achieve their operational goals.


In the field of ground reinforcement, jet grouting plays a vital role. This method involves mixing soil on site with injected cement grout to create cement-stabilized soil columns. The resulting soil is characterized by increased strength and reduced permeability, making it an engineered solution ideal for foundation support and groundwater management. It is commonly used for underpinning existing structures and forming cutoff walls for excavation support.

The process includes drilling a small-diameter pipe (about 4 inches) to the desired depth. Contractors then inject cement grout at high pressure, typically around 6,000 psi, through the drill pipe. As the pipe rotates and is withdrawn, it forms a circular column of improved soil. The diameter of these columns is adjustable, allowing for customizable support solutions. These columns can provide vertical support individually or be combined to create barriers against the movement of soil and water.

Jet grouting’s versatility is particularly beneficial in environments with subsurface utilities or other obstructions. Its minimal drilling technique allows for effective intervention in constrained spaces, enabling the creation of larger diameter soil columns beneath these obstacles. This makes jet grouting an effective and adaptable method for ground reinforcement in complex underground conditions. As a provider of jet grouting ground reinforcement services, Schnabel offers a combination of technical expertise and adaptability, delivering custom solutions for a variety of 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.