Chauny, Northern France – Underground networks geo-detection
INNOGEO often effectuates underground network geo-detection, like in Chauny, in northern France. The task, there, was to carry out an environmental diagnosis of a filling station and map out the underground networks and buried tanks. This will be useful in the event of a hydrocarbon leak so as to locate the affected areas, but also during surveys requiring mechanical drillings or any type of construction work. INNOGEO used GPR and radio-detection technologies on this project. Below, one can see the great density of underground networks present on the Chauny site (radar image).
Geotechnics and soil dynamics – UJF Grenoble – November 16th-17th 2011
Jean-Luc Mattiuzzo, CEO and President of INNOGEO, was a guest speaker at a training session organised by the lifelong learning centre at the Université Joseph Fourier in Grenoble. More than 40 people attended the training session which had for theme: Paraseismic conception and construction in the light of EUROCODE 8. Jean-Luc Mattiuzzo spoke about in-situ testings of soil dynamics (Cross-Hole, MASW, SASW…) and how to calculate Vs30 using on-site testings.
Cadarache Nuclear Research Centre, South-East of France – Microgravimetry to search for karsts
The CEA entrusted INNOGEO with the task of detecting karst cavities by microgravimetry on the site of Cadarache as part of a new construction project. 600 microgravimetry measures were taken in a short period of time as to impede as little as possible site activity. Because of the rugged nature of the terrain in the studied area, strict relief corrections were used to create a correct microgravimetric map of underground anomalies. Destructive soundings and video-inspections inside drillings were also performed when a cavity was discovered.
Marina in Hautmont, Northern France– Bathymetric survey
INNOGEO carried out a bathymetric survey of the river Sambre as part of the project of creation of a river marina in Hautmont. The survey made possible the mapping of the river bed on about 250 m. An accurate bathymetric map was also made. INNOGEO has all the equipment necessary for measurements and navigation on that type of operation.
Wind farm in Lafresguimont-Saint-Martin, Northern France – Electrical resistivity tomography
INNOGEO won a tender to carry out a tomography campaign in view of the construction of six windmills in the Somme region. Eleven electrical resistivity tomography scans were taken. They showed a good correlation with mechanical soundings carried out alongside. The goal of the study was to better characterise the windmills bases.
Flamanville Nuclear Power Plant, Normandy – Reinforcement radar detection
INNOGEO won an EDF tender to detect steel reinforcements on one of its buildings at the Flamanville Nuclear Power Plant. The operations will require the use of a high frequency radar on different concrete structures. The goal is to position drillings for the fixing of cables on the structure without causing any damage to the reinforcements.
East European High-Speed Line, Phase 2 – Search for cavities by geophysical methods
After work on the lots 41, 42, and 47 of the second phase of construction of the East European high-speed line, INNOGEO continues on its geophysical investigation with the lots 35 and 43A. Along the hundred or so kilometres of the high-speed line, we have used electromagnetic EM34 measurements, microgravimetric measurements, and GPR readings. To this day, more than 13,000 microgravimetry measures, 60 km of electromagnetic EM34 measures, and 16 km of radar profiles have been taken since November 2010. The operations should continue until mid-2012. INNOGEO also did some surveys by seismic refraction on the lots 35, 40, and 47, so as to define what type of levelling work to use. Vibration measurements were taken as well on lot 47 to determine the effects on the environment of the vibrations caused by the construction work.
Courier tunnel, Annecy, Savoy, France – Characterisation of concrete covering around steel reinforcements
INNOGEO was entrusted the task of carrying out in-situ testings in the Courier tunnel in Annecy, Savoy. The goal was to determine the concrete covering around the steel reinforcements in the arch and walls of the tunnel as part of a study of the behaviour of the structures in the event of a fire. The tests were done using the FERROSCAN method and at night to avoid road traffic.
Lampy dam, South-central France – Geophysical diagnosis of the dam and its foundation
INNOGEO was given the task of carrying out planned geophysical investigations by the group that won the VNF tender to overhaul the dam in Lampy. The goals are to perfect knowledge about materials that constitute the body of the dam and identify its granite foundations. Seismic tomography between upstream and downstream facing of the dam, Cross-Hole testings from drillings inside the structure and seismic refraction profiles will be used.
MONTBÉLIARD, Eastern France– A36 – GPR to search for cavities
INNOGEO worked in Montbéliard as part of the extension works of the A36 motorway. Further to soil collapse, a geophysical study was needed in order to detect potential cavities capable of affecting the limestone substratum. A GPR scan as well as EM measurements were carried out on more than 5 km of distance at the level surface and at the emergency stopping lane of the existing motorway.
Tunnel du chat – Savoy, France
INNOGEO was entrusted by the Conseil Général de Savoie the task of carrying out dilatometer tests at the Tunnel du Chat, in Savoy. The geological survey is part of their safety upgrade program.
Valduc Nuclear Research Centre, Center-East of France
INNOGEO conducted a MASW testing campaign to seismically characterise the platform of the future Safran building on the Valduc nuclear research centre site.
ECO STADIUM – Nice, South-east of France
INNOGEO undertook Cross-Hole testings to characterise seismically the site of the future ECO STADIUM in Nice.
Hospital Centre in Lille, North of France
INNOGEO carried out a microgravimetry campaign to localise and delimit the existing quarries at the edge of the extension project of the cardiology centre at the regional hospital in Lille.
East European High-Speed Line, Phase 2, Lot 35 – INNOGEO wins the tender to undertake geophysical surveys as part of the cavity hazard study.
The group led by Eiffage, that was appointed the design and realisation of lot 35 on the G section in phase 2 of the East European high-speed line, charged INNOGEO with the task of carrying out geological surveys. The goal is to search for cavities of natural origin (dissolution of limestone and gypsum) and of anthropogenic origin (quarries, galleries, military sapping …) that might affect the route. Operations will take place on-site in April and May 2011. They will consist of conductivity (EM34) and microgravimetry measures for the most part.
Laon – INNOGEO wins the tender for the radar geolocation of underground networks
INNOGEO was appointed by the city of Laon to detect and geolocate underground networks in two public highway zones of about 3 ha. The surveys will use radar and radio-detection technologies. Operations will take place in April-May 2011. After carrying out many projects for Électricité Réseau Distribution France and various local authorities, INNOGEO strengthens yet again its position in the geolocation of underground networks market.
Tramway T1 between Gennevilliers and Saint-Denis, Paris region, France – Detection of steel reinforcements to fix catenaries
INEO GDF SUEZ gave INNOGEO the task of radar detecting reinforcements present in the concrete of three existing buildings. This operation is part of the tramway T1 construction works between Gennevilliers and St Denis, in the Paris region. The goal was to prevent any deterioration of the steel reinforcements during the sealing of the catenary supports.
Aix-les-Bains, Savoy, France – Geophysical characterisation of the Sierroz dikes
INNOGEO was entrusted by the city of Aix les Bains in Savoy the surveying of the dikes of the Sierroz torrent. This is part of a security diagnosis needed for the creation of a future flood hazard prevention plan. Electric resistivity tomography and GPR were used on a 400m distance.
East European high-speed line – Phase 2 –Tunnel de Saverne (Lot 47)
The group appointed for the design and construction of lot 47 in the phase 2 of the East European high-speed line entrusted INNOGEO with a seismic refraction campaign. The lot includes the tunnel of Saverne and the Haspelbaechel viaduct. The goal was to study the sandstone substratum roof, its quality and its variability. Eight seismic profiles were deployed on a 1,200m distance on the sites of the Haspelbaechel viaduct and a large backfill.
Chambéry hospital and High Voltage A bushing in Chatelard(73), Savoy – Underground netword detection
ERDF entrusted INNOGEO with an underground network detection campaign as part of works to move a high voltage A line around the Chambéry Hospital and through the Chatelard village in Savoy. GPR and radio-detection technologies were used along the new cable route to detect anything that could impede the works.