Expert Solutions in

J E T G R O U T I N G

Head Office: 6, rue de Watford - 92000 NANTERRE - FRANCETél.: +33 (0)1.47.76.42.62 - Fax: +33 (0)1.47.75.99.10

http://www.soletanche-bachy.com

EUROPE INTERNATIONAL

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The experience acquired by Soletanche Bachy from more than 150 jet grouting projects

employing different systems in a variety of soils throughout the world is an assurance of robust optimised design

using this technique

ll Autriall Belgiumll Czech Republicll Denmarkll Eirell Francell Germanyll Hungaryll Monaco

ll Norwayll Polandll Portugal ll Rumaniall Russiall Slovakiall Spainll Swedenll Switzerland

ll The Nertherlandsll United Kingdomll Ukraine

ll Argentinall Australiall Brazilll Caribbeanll Chilell Chinall Colombiall Ecuadorll Egypt

ll French Guianall Guadeloupell Guatemalall Hong Kongll Indiall Indonesiall Iranll Ivory Coastll Korea

ll La Reunionll Madagascarll Malaysiall Mexicoll Moroccoll Panamall Puerto Ricoll Senegalll Singapore

ll South Africall Taiwanll Thailandll United Statesll Venezuelall Vietnamll West Indies

J E T G R O U T I N G

Cairo underground railway

Jet energy versus column diameter for twin-jet system in dense fine-grained

sand below water table

PARIS - Rehabilitation of

RER C rapid transit line

Project finalisation

The jet system and parameters are selected on the

basis of:

- the energy of the jet needed to obtain the desired

radius of action with the proposed jet system,

- grout formulation needed to achieve the required

strength in the grouted soil.

FRANCE

Sissonne church

Jet system selection trials

Single-jet column

Twin-jet column

characteristics of the ground and jet system performance

and limitations,

• performance of trials to check that the proposed

method and jet parameters meet the requirements of

the design.

Consolidation design

Project design

The design of a jet grouting project involves a number of

steps, in which iterations may help optimise the design:

• determination of general geometry and strength of the

structure (and permeability if applicable),

• determination of jet details (geometry, arrangement)

with reference to geotechnical and hydrogeological

System and parameter selection

Choice of method and parameters

Trial shaft

The jet grouting process consists of breaking up the soil

with a high pressure jet in a predrilled borehole and

mixing the loosened soil with a self-hardening grout to

form columns, panels and other structures in the ground.

The choice of the most appropriate system and operating

parameters is dictated by:

J E T G R O U T I N G

Columns construction using twin jet

• the type and geotechnical properties of the soil to be

treated,

• the radius of action of the jet needed to achieve the

required size of the mixed-in-place structure,

• the desired mechanical post-treatment soil properties,

• the site constraints and its environment.

TRIPLE JET

Soil loosening is performed by a jet of water

shrouded by concentric jet of air. Grout injec-

tion is performed by a separate jet of grout.

Principal jet systems

The process

SINGLE JET

Soil loosening and grout injection are per-

formed by a jet of high pressure grout from

nozzles at the bottom end of a drill rod.

TWIN JET

Soil loosening and grout injection are per-

formed by a high pressure jet of grout shrouded

by a concentric jet of air which increases the

radius of action.

J E T G R O U T I N G

S E C A N T C O L U M N

C U T - O F F

S E C A N T P A N E L S

C U T - O F F

The jet grouting method is suitable for all soils (from clay to sand and gravels), capable of producing a wide variety of structures through a combination of columns, panels, half-columns, etc...

T U N N E L T R E A T M E N T

U N D E R P I N N I N G

S H A F T T R E A T M E N T

LYON - BPNL Tunnel

Roof consolidated as tunnelling proceeds

Motorway tunnel - Section through

collapsed area

Solid grouting from ground surface and

horizontal jet grouting through steel ribs

into collapsed ground

Lyon metro

Tunnel driving under buildings

300 single-jet columns built from base-

ments with confined access

Singapore

underground railway

550 triple-jet columns,

depth 25m, diameter

180cm, in very soft clay

The jet grouting process can be applied to anything from major civil engineering works to local underpinning of buildings

in confined spaces

Deauville

Underpinning hotel before

excavating car park

Lunéville

Underpinning interior walls of

building with twin-jet half-columns

AUSTRALIA - Cannington Mine

Twin jet down to 85m deep (depth record)

Sèvres Achères trunk sewer

Ring of triple-jet columns in

variable soils

KENYA - Thika Dam

Cut-off under dam

16,500ml of 120cm dia. triple-jet

columns down to 35m depth

FRANCE - Lillebonne

Factory containment

3000 m2 cut-off by 3m span

panels inside an operational factory

S E C A N T C O L U M N

B L O C K

Cairo underground railway

Jet-grouted blocks at tunnel

break-in and break-out sites.

100 000 m3 of treated soil

using columns of twin jet

Ø 1.5 to 3 m

ITALY - Gambolo

Landfill encapsulation with 9000 twin-jet

grouted columns of 150cm diameter

forming a watertight bottom and 6000 m²

of diaphragm walls forming

the watertight sides

S E C A N T C O L U M N

B O T T O M “ S L A B ”

J E T G R O U T I N G

FRANCE

La Tour Maubourg Car Park

Formation of an underground

bottom slab “strut”, to deepen

a basement excavation

SAN SALVADOR - Cuscatlan Bridge Piers

Circular wall and base foudations using twin-jet columns

NICE - Lenval Hospital

Plunged columns

FRANCE - Concarneau

Quay wall stabilised with reinforced

twin-jet columns

The jet grouting process is extremely versatile

NICE - South urban motorway

Slope supported with twin-jet tangent-column

buttresses

PARIS - Saint Martin Turbigo Car Park

Retaining wall between two diaphragm walls

under operational car park

SWITZERLAND - Lucerne

Schweizerhof hotel

Repairs: leak treatment within

diaphragm wall joints

PARIS - Louvre Museum

Foundation to cover slab to Charles V crypt�

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