Geotechnical Grouting is primarily used to modify the behaviour of existing soil or rock without excavation.
Geotechnical Grouting is Used When:
Not practical to excavate and replace
Areas with limited access
Contaminated materials present
Behaviours that can be modified include:
Densification/Compaction
Bonding (anchors and piles)
Settlement reduction
Permeability reduction
Strengthening
Reinforcement
Purposes of geotechnical grouting:
Temporary improvements in soil or rock to facilitate construction.
Permanent improvements in soil or rock.
Geotechnical Grouting is an in-situ ground improvement method comprised of a variety of techniques used to improve the engineering properties of soil and rock by injecting cementitious or chemical mixtures under pressure via injection ports.
Grouting improves the bearing capacity of soils and decreases the permeability of soils and rock formations by filling pores and cavities.
Geotechnical grouting is a specialized construction process used to improve the ground's physical properties. There are several types of geotechnical grouting, each serving different purposes:
Compaction Grouting: Injecting a thick grout mixture into the soil at high pressures. The grout displaces and compacts the surrounding soil, improving its density and load-bearing capacity. It's commonly used to stabilize loose soils and fill voids.
Permeation Grouting: Injecting grout into porous ground to fill the spaces between soil particles. The grout solidifies, binding the particles together and increasing the ground's strength and stiffness. It's useful for controlling groundwater flow and improving soil stability.
Chemical Grouting: Injecting chemical solutions that react with the soil and solidify. This method is often used for sealing fine sands and other porous soils to prevent water infiltration. It's also used in tunnelling and sewer rehabilitation.
Applications
Mitigate Settlement
Grouting helps address this problem by improving the soil's properties and providing additional support to the existing foundations
Filling of Sinkholes
Useful to stabilize the soil around the sinkhole to prevent expansion. Can also fill the void or cavity that caused the sinkhole and prevent further collapse.
Increase Slope Stability
Grouting can bind loose soil particles together, increasing the overall strength and stability. Filling the pores and voids in the soil reduces permeability, which helps control water movement within the slope.
Groundwater Control
Grouting is particularly effective in controlling groundwater flow, a challenge that might not be as directly addressed by traditional stabilization methods
Advantages
Minimal Vibrations/Spoils
Grouting is less invasive compared to other ground improvement techniques. It requires minimal excavation and surface disruption
No Engineered Pad
Compared to other deep foundation systems, the equipment needed for grouting is lighter and takes up a smaller footprint and does not require an engineered pad.
Tight Access Installation
Grouting requires smaller machinery compared to traditional methods like piling or earth anchors. This can be a significant advantage in urban or hard-to-reach areas.
Water Control
By filling pores and cracks in the soil, grouting can effectively control groundwater flow. This is important in projects like tunnels, basements, and other underground structures where water ingress can be a major problem.
Speed and Efficiency
Grouting can often be completed more quickly than installing deep foundations or performing extensive excavation and replacement. This efficiency leads to reduced project timelines and lower labor costs.
EBS GEOSTRUCTURAL'S
BUILD ON Approach
At EBS, we have a passion for construction. We live for the challenges associated with today's construction environment. Sites with poor soils, redevelopment of sites, limited access, and adjacent structures. Our team includes structural and geotechnical engineers you can work alongside to design or re-design for the most effective solution for your project.
We blend proven technologies and techniques to push projects forward, sometimes in novel combinations.
Our experienced field staff work closely with our in-house engineering team to develop solutions to site challenges.
We quickly evaluate your project and outline solutions, options, suggestions and budget pricing.
BUILD ON our Growth | Respect | Integrity | Teamwork
PERMEATION GROUTING
- CASE HISTORY-PERMEATION GROUTING
Stabilising settlement cause by voids
