Jet Grouting

The pile root, also known as an injection pile or tie rod pile, is a type of deep foundation used in civil engineering to transfer loads from the soil to deeper and more stable layers. Unlike other types of piles, the pile root is constructed in situ, meaning it is formed on-site where it will be used.

It is a system for consolidating soft soils that uses a high-pressure and high-velocity jet of cement slurry introduced into the ground through an injection nozzle. This jet disintegrates the soil structure and mixes with it, forming a column of soil-cement.

Traditional soil consolidation techniques, based on injections of cement mixtures, sometimes face problems such as the presence of soils with highly heterogeneous permeability and particle size characteristics, resulting in a higher concentration of the mixture in more permeable zones and a lack of cementation in less permeable zones. Additionally, there may be difficulties in execution when it is necessary to limit the injection pressure to avoid damage to nearby structures.

Indeed, in response to these challenges, a process known as Jet Grouting was developed. It relies on the use of a high-pressure and high-velocity jet of liquid, typically a cement slurry, which is injected into the ground through a specialized nozzle. This jet of liquid disaggregates the soil structure and intimately mixes with it, forming a "cement soil column" that is well-bonded with the surrounding soil.