Techniques

Jet grouting

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.

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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 Brochure

Jet grouting 2002 va.pdf


Réalisations

Isséane

Work : BUILDING,URBAN EXCAVATIONS | Year : | Location : FRANCE

Deep foundations works for a household waste treatment plant.

A498.pdf

Marina bay sands

Work : BUILDING,URBAN EXCAVATIONS | Year : 2007 | Location : SINGAPORE

Basement retaining walls and foundations for 3 high rise hotels

A496.pdf

Genk central lock

Work : MARITIME WORK | Year : 2007 | Location : BELGIUM

Rehabilitation of a river lock

A531.pdf

RER C - Saint-Bernard trench - Paris

Work : METROS,RAILWAY WORKS,REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS | Year : 1996 | Location : FRANCE

Consolidating an existing structure with Jet grouting columns.

A324.pdf

Quai Carnot - Concarneau Harbour

Work : MARITIME WORK ,REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS | Year : 1998 | Location : FRANCE

Reinforcing a quay wall with reinforced Jet grouting columns (double Jet).

A321.pdf

Terminal Cuenca del Plata

Work : MARITIME WORK | Year : 2009 | Location : URUGUAY

Constructing an extension to the Cuenca del Plata port terminal as a general contractor

A533.pdf

Clarke Quay station and tunnels

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.

A351.pdf

Grand Palais

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.

A443.pdf

la Duchère tunnel - Lyons Northern Ring Road

Work : ROAD STRUCTURES,TUNNELS | Year : 1995 | Location : FRANCE

Consolidating a collapsed tunnel via compaction grouting from the surface and horizontal jet while progressing.

A243.pdf

RER C - castor

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.

A519.pdf

Tenay Viaduct - Argis-Tenay diversion

Work : ROAD STRUCTURES | Year : 1994 | Location : FRANCE

Building round protective excavation structures in order to protect a viaduct pile bedplate-micropile link.

A242.pdf

El Azhar road tunnels

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.

A379.pdf

Teesta dam

Work : DAMS | Year : 2002-2003 | Location : INDIA

Constructing watertight cutoffs using jet grouting and grouting.

A503.pdf

Bangkok metro - Blue Line

Work : METROS,RAILWAY WORKS,SHAFTS | Year : 1997 - 2000 | Location : THAILAND

Construction of nine stations and associated works for Bangkok's first underground railway line.

A380.pdf


Voyage au coeur de l'ingénierie de pointe

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