Jet grouting is a construction process that uses a high-pressure jet of fluid (generally 20 – 40 MPa) to break up and loosen the soil at depth in a borehole and to mix it with a self-hardening grout to form columns, panels and other structures in the ground. The parameters for the jet-grouting process and the desired final strength of the treated soil depend on a number of characteristics, such as the soil type, the technique used and the objective to be reached. In granular soils, the high-pressure jet breaks up the grains through erosion, while in a cohesive soil, such as clay, the jet breaks the mass up into small particles. High pressure is needed to produce the kinetic energy required for the jet through a small-diameter nozzle. Waste material from the process (a mix of soil, water and binder) is recovered at the surface before being taken away for disposal.
Three basic jet grouting systems are currently used:
The process can be used in all loose or soft-rock soils to reinforce them or, in certain cases, to make them impermeable: underpinning buildings, dam cut-off wall, excavation retaining wall, pipe roofing for tunnels, with possible reinforcement of side-walls, etc.
When jet grouting is used for soil impermeability, it is sometimes necessary to use an additional grouting treatment, depending on the required final soil properties.
Download the Jet Grouting BrochureJet grouting 2002 va.pdf
Work : BUILDING,URBAN EXCAVATIONS | Year : | Location : FRANCE
Deep foundations works for a household waste treatment plant.
Work : BUILDING,URBAN EXCAVATIONS | Year : 2007 | Location : SINGAPORE
Basement retaining walls and foundations for 3 high rise hotels
Work : MARITIME WORK | Year : 2007 | Location : BELGIUM
Rehabilitation of a river lock
Work : METROS,RAILWAY WORKS,REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS | Year : 1996 | Location : FRANCE
Consolidating an existing structure with Jet grouting columns.
Work : MARITIME WORK ,REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS | Year : 1998 | Location : FRANCE
Reinforcing a quay wall with reinforced Jet grouting columns (double Jet).
Work : MARITIME WORK | Year : 2009 | Location : URUGUAY
Constructing an extension to the Cuenca del Plata port terminal as a general contractor
Work : METROS,RAILWAY WORKS,TUNNELS | Year : 1997 - 1999 | Location : SINGAPORE
Geotechnical works associated with the construction of a major underground station for the Singapore MRT North East Line.
Work : REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS | Year : 2001 - 2003 | Location : FRANCE
Underpinning the “Grand Palais”, built in 1900 and protected as a National Heritage monument, and creating a new retaining wall for a future underground structure in the main hall.
Work : ROAD STRUCTURES,TUNNELS | Year : 1995 | Location : FRANCE
Consolidating a collapsed tunnel via compaction grouting from the surface and horizontal jet while progressing.
Work : METROS,RAILWAY WORKS,REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS | Year : 2007-2008 | Location : FRANCE
RER C tunnel renovation using jet grouting restrictive urban site.
Work : ROAD STRUCTURES | Year : 1994 | Location : FRANCE
Building round protective excavation structures in order to protect a viaduct pile bedplate-micropile link.
Work : ROAD STRUCTURES,TUNNELS | Year : 1998-2000 | Location : EGYPT
Construction of two 2.7km tunnels under old Fatimid city and Khan El Khalily working class district.
Work : DAMS | Year : 2002-2003 | Location : INDIA
Constructing watertight cutoffs using jet grouting and grouting.
Work : METROS,RAILWAY WORKS,SHAFTS | Year : 1997 - 2000 | Location : THAILAND
Construction of nine stations and associated works for Bangkok's first underground railway line.
Voyage au coeur de l'ingénierie de pointe
Find out more about our expertise by: