Sounding of the jetty in the commercial port of Ile Rousse in Corsica
INNOGEO carried out a campaign to detect cavities in the body of the jetty in the commercial port of the Ile Rousse in Corsica. We were working as part of their restoration of the jetty project. These operations were decided upon after disorders in the dock structure were noted. 300 microgravimetry measures and many radar profiles were taken and made apparent areas that are the most likely to contain disorders.
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INNOGEO continues steel reinforcements detection operations at the Flamanville III Nuclear Power Plant where construction is still underway
EDF and INNOGEO signed a 3-year contract in September for our company to carry on reinforcement detection operations in Flamanville III. These detections come before sampling and concrete drilling operations for the installation of some power plant equipment.
Algeria- Dam of That- INNOGEO trains Algerian engineers in the use of hole dilatometer
TELEMAC assigned INNOGEO the task of training some Algerian engineers in the use of hole dilatometer tests at the That dam, near Oran, in Algeria. One of INNOGEO’s engineers spent a week on the site for complete their training.
Detection of networks on the site of the Nuclear power plant in Saint Alban, South-eastern France
EDF entrusted INNOGEO with an underground network detection campaign on the site of the Saint Alban nuclear power plant as part of a new buildings construction project.
Study of the Racas karstic aquifer in Revest-Les-Eaux, South-eastern France
VEOLIA Eau/ Société des Eaux de Toulon chose INNOGEO for an electrical resistivity tomography campaign in Revest-Les-Eaux, in the south-east of France. This campaign is part of a larger study of the Racas aquifer upstream of the drinking water impoundment of Dardennes. The electrical resistivity tomography measures helped
specifying the geologic structure of the site and, in particular, locating structural accidents.
Shear wave measurements in Dunkirk, North of France
INNOGEO carried out some work at the methane terminal of Dunkirk. The goal was to determine the propagation velocity of shear waves in a testing platform of gravel compacted columns for the validation of the ground strengthening process as proposed by MENARD. Cross-Hole tests and tests by seismic transparency were used.
Survey of the subsoil at the Saclay Nuclear Research Center, Paris region
INNOGEO carried out some work on the site of the Saclay Nuclear Research Center in the Paris region. We did a radar investigation of the subsoil of a structure in the process of being dismantled.
Sounding of the vault of the VNF river tunnel of Balesmes-sur-Marne, in the north-east of France
INNOGEO was called in to do a radar sounding of the vault of the tunnel as part of a project to secure the tunnel and install a ventilation system. We were able to determine areas that were best to install high capacity ventilators.
Cross-Hole testing at the site of the future IKEA store in Clermont-Ferrand, Central France
INNOGEO did Cross-Hole tests up to 30 meters depth to determine the velocity of shear and compression waves as well as the Vs30 parameter (EUROCODE 8). For Vs30, Vs30 = 30 / S (hi/Vi) with hi and Vi respectively the thickness and the shear wave velocity in the i starta up to 30m depth. This work is part of calculations of soil-structure interaction under seismic influence and in accordance with the Eurocode 8.
Sounding of railways between Marseilles, Aubagne, and Toulon, South-East of France
INNOGEO operated as part of preliminary investigations to maintenance work on the tracks. We sounded by radar and by penetrometry the ballast and its underlays. The goal was to locate problem areas needing repair works. 2 km worth of tracks have been measured by GPR from a mobile platform. Data is then processed and depicted thanks to a software specific to this type of investigation.
Sounding of railways in Auvergne, France
INNOGEO does GPR measures to characterise the condition of the ballast and its underlays as part of preliminary surveys in preparation for renovation works on many RFF lines in Auvergne (French railway network). The measurements are taken at night from a track motor car at a speed of 20 to 40km/h, enabling simultaneous acquisition of many geolocated GPR profiles in real time.
Vibration measurements for the IRSN (French Institute for Radiological Protection and Nuclear Safety) at the Cadarache center
The French Institute for Radiological Protection and Nuclear Safety entrusted INNOGEO with a vibration study as part of the construction of a new building on the Cadarache site. A very high sensitivity acquisition chain was used to determine vibratory levels likely to affect the structure which has a very low vibration threshold.
Detection and location of steel reinforcements in the Flamanville nuclear power plant
EDF and ALSTOM entrusted INNOGEO with several detection tasks. We were asked to detect steel reinforcements in the concrete of the superstructures of the power plant. The goal is to precisely locate the reinforcements so as to prevent any damage during drilling and sampling works for the installation of power plant equipment.
Detection of underground networks in Orleans, North-central France
ERDF (Électricité Réseau Distribution France ) entrusted INNOGEO with a campaign of underground network detection in Orleans. It is part of a national trial aimed at testing the rules governing the application of the new decree DT-DICT which will be in effect starting July 1, 2012. The project concerns two avenues, for a total distance of 1600m. This trial is part of moving works for a high voltage A cable.
Mapping of underground cavities in Guichainville-Vieil Evreux, Eure, Northern France
INNOGEO won the Grand Évreux Agglomération tender for several microgravimetry campaigns to detect and locate cavities on the site of the ZAC du Long Buisson (mixed development zone) in preparation for its layout. More than 1200 measures were taken on a 3ha zone.
Detection of the prestressing cables of two viaducts on the A36 motorway, France
INNOGEO was tasked a radar detection campaign on the viaducts of Arbouans and of Belchamp. The goal was to detect the prestressing cables of the 2 viaducts as part of a project to widen the A36 motorway to 2×3 lanes near Montbéliard, in Eastern France. A first test was made to make sure the technology used was the right one, considering the density of steel reinforcements near the prestressing cables. A first campaign was conducted after the method was validated. Another one is scheduled at a later stage depending on the work phasing.
Underwater seismic refraction in the Cannes marina
INNOGEO won the tender held by the Chamber of Commerce and Industry of Nice Cote d’Azur to carry out a geophysical survey as part of a development plan of the Cannes marina. Several underwater seismic refraction profiles were taken to map the top of the bedrock.
Geophysics survey on the East European High-Speed line
Geophysics studies started in 2010 on the East European High-Speed Line, phase 2, between Beaudrecourt and Vendenheim, in the East of France, are continuing on lots 35, 41, and 42. The aim is still to look for cavities on the future train route. Since the beginning of the project up until the end of 2012, more than 25,000 microgravimetry measures will have been done, as well as a few tens of kilometres of GPR and conductivity EM34 measures. All of these were taken in areas likely to contain natural or anthropogenic cavities. Several of INNOGEO’s teams are based on the site so as to intervene without delay depending on the progress of the levelling work.
Acquisition of a GPR Easyscan 3D from GGSI
This new tool is equipped of a 1,600MHZ antenna, of electronics, and of a software, making it capable of reproducing in 3D and on-site the position of reinforcements up to about 40/50cm depth. The acquisition has already been successfully used by INNOGEO on the sites of the Flamanville Nuclear Power Plant and of the Valduc Nuclear Research Center.