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Subsurface Injection Grouting

Subsurface Injection Grouting and Mudjacking in NYC, Manhattan, The Boroughs, Nassau County, Suffolk County, Long Island, and New Jersey - Kagaoan Engineering

Subsurface Injection Grouting and Mud Jacking in NYC, Manhattan, The Boroughs, Nassau County, Suffolk County, Long Island, and New Jersey - Kagaoan Engineering

Geotechnical Consultants and Contractors for Subsurface Injection Grouting and Mudjacking Services

Soil displacement is a common occurrence in construction projects. Houses, buildings, and foundations settle. As structures age, water levels change, and environmental factors evolve soil moves. Uneven ground shifting can cause buildings to crack, causing all sorts of problems for the property owner. Leaving the issues will only exacerbate the situation, so a permanent resolution is necessary. 

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Geotechnical engineering teams offer a cost-effective and faster solution for foundation and soil issues using grout to stabilize the ground under the slab. This solution is permanent and less invasive than replacing the entire foundation. Our engineering teams at Kagaoan Engineering offer mudjacking services and soil stabilization processes for various site conditions and requirements. As a leader in New York, we know the typical problems associated with soil shifting and water erosion. Our in-depth knowledge and a comprehensive team of geological engineers, designers, and technical staff use our wealth of knowledge and network to create a safe and effective solution specific to your foundation stabilization needs. 

What is Groutability? 

This term refers to how much injection material the ground can hold. Some soil layers are dense, while others are very porous. Grouting refers to filling underground layers with a polyurethane, cement, or chemical material to reduce the size of the voids, push out air and water, and provide a more stable foundation for buildings, bridges, dams, parking lots, and other heavy structures. Geotechnical engineers use boreholes, radar, and other technologies to investigate the underground layers to determine what materials engineering teams can use to fill subsurface voids. Another factor these professionals consider is the thickness of each grout type. Equipment used in mudjacking and grouting includes:
  • Vertical and horizontal silos
  • Mix tanks
  • Jumbo bag silos
  • Continuous mix batch stations
  • Automated grout for constant injection
  • Slurry batch plants
  • How compaction grouting works
One method of subsurface grouting is compacting where wet soil is made firm by using a dense fill. This grout is thick and is useful above and below groundwater levels. Because the material dispels the moisture, compaction grouting is preferable when working with areas that tend to flood or experience recurring soil shifting episodes. Careful injection of the grout ensures the material does not disturb the compaction already in place. 

Applications for Subsurface Grouting
  • Filling cracks beneath the surface
  • Stabilizing sinkhole areas
  • Compacting the soil
  • Adding strength to a foundation
  • Permeation fills
  • Soil-cement packs
  • Filling tunnels, mine shafts, and trenches
  • Stabilizing or blocking off underground pipes
What is Mudjacking?

When the soil around and under a foundation settles, it may do so unevenly. Mudjacking is a term referring to leveling the slab to support the structure and reduce the chance of further settling. Sagging foundations are one of the most common reasons a property owner might use this service. Civil engineers often contract the services of geotechnical engineers to help stabilize the foundations beneath airports, overpasses, highways, walls, and residential buildings. 

Slab Raising with Grout

When a foundation is settling incorrectly, mudjacking is a way to add strength to the soil beneath the slab. Grout fills in loose dirt and pockets formed by air and water erosion. Open cavities slowly fill, keeping the soil stable during the process. When the curing time is over, the unstable foundation sits on a solid soil pack.

Advantages of Mudjacking Versus Foundation Replacement

Filling in the ground beneath the structure is a much cheaper alternative to digging out the entire slab. Replacing the foundation puts a strain on the building which needs alternate supports during the demolition and installation of a new slab. Problems with building cracks and damage may result. This risk is present with mudjacking, but the percentages for catastrophic failure are lower. 

Solidifying the voids of shaky soil is an invasive process, but total foundation replacement is even more in-depth. Many highway construction projects and business expansions have tight deadlines which make mudjacking the preferred alternative. A highly qualified geotechnical engineer can oversee the process, ensuring time constraints are met along with meeting building codes and adhering to local regulations. 

Responsibilities of Subsurface Injection Grouting Consultants

Durability concerns - Long-term safety and performance is a primary factor when choosing the type of material to use for filling voids and cracks. Raising foundations requires mudjacking solutions with enough durability to withstand a particular load rating. Ensuring the safety and stability of a site for years or decades is necessary for business projections, maintenance schedules, and future construction projects. 

Streamlining and meeting deadlines - Since grouting is only one part of construction projects, this action needs to be efficient. Quickly performing this part of the job lets the crew continue to the next stage of the project. Helping keep the job on track is one advantage of using geological engineering teams. 

Protecting the environment - Of utmost importance is keeping everyone and everything safe before, during, and after project completion. Geotechnical engineers have many things to consider, like making sure the nearby water sources are not polluted, there is minimal disturbance to the wildlife in the area, and the crews and building occupants remain safe. Keeping the site safe from landslides, uneven lifting, major ground shifts, and rock movement are a few responsibilities mudjacking consultants must oversee. 

Signs of An Uneven Foundation
  • Sticking doors and windows
  • Holes in the ground
  • Stair-step cracks on the lowest level
  • Uneven floors
  • Floor or ceiling separation
Our mudjacking consultants are licensed and certified to provide customized stabilization solutions. With decades of experience with large and small projects, Kagaoan Engineering has the technical skills and equipment to fix your foundation issues.

Please contact us for a free consultation
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About Kagaoan Engineering


Every member of Kagaoan Engineering is an experienced professional who brings distinct strengths and specialities to the company. We work together as team to ensure that your project has the skill sets required to succeed.
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