GEOTECHNICAL GROUTING

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.