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.
Work : DAMS | Year : 1992 - 1994 | Location : SWITZERLAND
Grouting works on a deep cut-off curtain in rock.
Work : BUILDING,URBAN EXCAVATIONS | Year : | Location : FRANCE
Deep foundations works for a household waste treatment plant.
Work : MARITIME WORK | Year : 2007 | Location : BELGIUM
Rehabilitation of a river lock
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.
Work : REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS,SEWERAGE | Year : 2009 | Location : FRANCE
Restoration of a main sewer by contact grouting
Work : BUILDING,URBAN EXCAVATIONS | Year : 1996 | Location : MONACO
A turnkey 17 000 m2 excavation.
Work : TUNNELS | Year : 1988 1989 | Location : BELGIUM
Installing four water inlet and outlet ducts under a nuclear plant cooling canal.
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.
Work : UNDERGROUND CAR PARKS ,URBAN EXCAVATIONS | Year : 1995 | Location : FRANCE
Design and construction of 5-level 320 place underground car park.
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.
Work : METROS,RAILWAY WORKS,SHAFTS,TUNNELS | Year : 2001 - 2005 | Location : FRANCE
Construction of 1.1 km of tunnel, an underground station and 2 shafts.
Work : DAMS | Year : 2006-2008 | Location : UNITED STATES
Construction of a grout curtain using computer controlled injection.
Work : DAMS | Year : 1988-1992 | Location : ARGENTINA
Impervious grout curtain into a fossil valley. Piedra del Aguila Dam. Alicopa Hydroelectric Complex. Argentina
Work : BUILDING,VOIDS AND QUARRIES | Year : 2008 | Location : FRANCE
Infilling of underground quarries for the construction of 7 floor buildings with shallow foundations.
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.
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