Jet Grouting
Jet grouting is a family of processes that employs combinations of high energy jets of air, water and grout to disaggregate, partially or fully replace and remix soil in situ.
This process of blending soil with selected materials can produce a modified or re-engineered soil that has strength, impermeability and/or elasticity.
The process is achieved by installing specialised jetting equipment down conventionally drilled small diameter holes of no more than 150mm.
There is great flexibility in the choice of borehole entry points which allows the formation below ground to consist of complex geometrical shapes of treatment by combination of overlapping individual treatment zones.
This can be particularly useful in the built up urban environment where both surface and underground obstructions may occur and where other conventional construction methods and excavations can’t be utilised.
The process of forming jet grout columns can be used in a number of applications such as underpinning existing buildings, forming watertight cut offs, basements, tunnel and shaft construction, foundations and deep slabs.
Our latest developments include JET PLUS for the formation of large columns in granular soils and NAVI-JET, a steerable jetting system. This permits boreholes to be drilled around obstructions so that ground treatment can be executed in previously inaccessible locations.