Techniques

Grouting

Grouting involves the injection of a pumpable product (slurry), which will subsequently stiffen, into the soil or into man-made material (masonry), in order to consolidate the soil or structure or make it impermeable, through filling all the voids it contains. The slurry can fill the voids in the ground, the cracks within rock, solution cavities (it is then referred to as fissure and permeation grouting) and/or displace the surrounding soils through a bottom-up process or by fracturing (compaction grouting or solid injection - see the section on the subject - and strain injection). Grouting with soil displacement may be used to prevent potential damage to the structure brought about by excavations (galleries and tunnels, major urban excavations, etc.) and this is called compensation grouting (see the relevant section).

Quality control during grouting is a key success factor for successful completion of the process. Soletanche Bachy has its own in-house control system, called SPICE (and GROUT I.T. in the USA), the development of which started in the 1980s. The system drives the vast amount of data required for each grouting operation, at every level of production: the setting-up stage (borehole geometry and the calculations of the volumes of grout needed) the acquisition and injection settings, controlling the grouting plant (monitoring the pumps, acquiring flowrate and injection-pressure data), and tracking quality and production.



The software package developed by Soletanche Bachy comprises a suite of interactive programmes:

- CASTAUR groups together all the exploration data and establishes the location of grout holes.
- SPICE is installed in the grouting plant and controls all grouting operations, including the electro-hydraulic grouting pumps.
- SPHINX organises all the grouting data and presents them in a graphic format.
The advanced features of this package make it enormously helpful in the grouting process:
- Safety, data collection and subsequent control of operations in the field are extremely precise and rigorous.
- Quality: powerful synthesis and analytical tools produce fast, automatic reports and diagrams ;
- Performance: higher productivity, along with efficient control that fits in with the increasingly high turnaround rate.


Réalisations

Salanfe Dam.

Work : DAMS | Year : 1992 - 1994 | Location : SWITZERLAND

Grouting works on a deep cut-off curtain in rock.

A251.pdf

Isséane

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

Deep foundations works for a household waste treatment plant.

A498.pdf

Genk central lock

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

Rehabilitation of a river lock

A531.pdf

Turkwel dam

Work : DAMS | Year : 1991 | Location : KENYA

The Turkwell Gorge Hydroelectric Project (grout curtain cut-off and drainage) consists mainly of a double-curvature arch dam, 7 km of water tunnels, an access galleries and an underground power house.

A199.pdf

S.A.R. wastewater effluent

Work : REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS,SEWERAGE | Year : 2009 | Location : FRANCE

Restoration of a main sewer by contact grouting

A532.pdf

Culture and Exhibition Centre

Work : BUILDING,URBAN EXCAVATIONS | Year : 1996 | Location : MONACO

A turnkey 17 000 m2 excavation.

A302.pdf

Tihange Nuclear Power Station

Work : TUNNELS | Year : 1988 1989 | Location : BELGIUM

Installing four water inlet and outlet ducts under a nuclear plant cooling canal.

A325.pdf

Atlantic TGV - Montparnasse station

Work : RAILWAY WORKS,VOIDS AND QUARRIES | Year : 1987-1989 | Location : FRANCE

Filling of underground galleries and consolidation of collapsed rock prior to constructing deep, heavy load bearing foundations.

A053.pdf

Baudoyer car park

Work : UNDERGROUND CAR PARKS ,URBAN EXCAVATIONS | Year : 1995 | Location : FRANCE

Design and construction of 5-level 320 place underground car park.

A311.pdf

Carré Royal - Reims

Work : REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS,URBAN EXCAVATIONS | Year : 2006 | Location : FRANCE

Facades underpinning and creating a new excavation within the perimeter of the former Galeries Rémoises.

A523.pdf

Toulouse metro, B Line, Contract No 3

Work : METROS,RAILWAY WORKS,SHAFTS,TUNNELS | Year : 2001 - 2005 | Location : FRANCE

Construction of 1.1 km of tunnel, an underground station and 2 shafts.

A528.pdf

McCook reservoir - Phase 1

Work : DAMS | Year : 2006-2008 | Location : UNITED STATES

Construction of a grout curtain using computer controlled injection.

A518.pdf

Piedra del Aguila Dam

Work : DAMS | Year : 1988-1992 | Location : ARGENTINA

Impervious grout curtain into a fossil valley. Piedra del Aguila Dam. Alicopa Hydroelectric Complex. Argentina

A187.pdf

Concorde ZAC

Work : BUILDING,VOIDS AND QUARRIES | Year : 2008 | Location : FRANCE

Infilling of underground quarries for the construction of 7 floor buildings with shallow foundations.

A506.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


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