Noise

French regulations impose increasingly strict standards regarding noise levels, whether for noise emitted by vehicles, industrial facilities or acoustic insulation in buildings.

Our team performs sound level measurements in accordance with applicable standards, using precision equipment, including class 1 sound level meters.

Vibration

During public works, vibrations generated by construction machinery can affect nearby structures: residential buildings, civil engineering works, pipelines or sensitive equipment.

STRATAGEM974 sets up continuous vibration monitoring using a network of sensors, in order to prevent threshold exceedances and contribute to the safety of workers, the public and structures.

Dust and electromagnetic waves

We also provide indoor and outdoor air quality monitoring services, particularly for workers’ exposure to dust on construction sites, as well as measurements of exposure to electromagnetic waves inside buildings.

Securing works before intervention

The installation of new infrastructure, such as optical fiber, high-voltage cables or pipelines, is often carried out in areas already occupied by existing underground networks: electrical cables, telephone networks, water pipelines or other buried structures.

Despite the existence of utility plans and preliminary declarations of works, many accidents still occur due to insufficiently accurate or outdated information.

Our services help to

• Locate buried or embedded utilities before works.
• Reduce the risks of electrocution, water service disruption or telecommunication outages.
• Update as-built drawings.
• Improve the safety of workers and users.

Certifications

STRATAGEM974 holds the certification for detection and georeferencing of buried utilities, issued by CCTA, mandatory under the regulations in force since January 1, 2018. The engineering office also holds the QUALIFNEDRE qualification issued by FNEDRE.

Diagnosis of reinforced concrete structures

We perform non-destructive structural diagnostics of reinforced concrete structures in order to assess the position, spacing, concrete cover and diameter of reinforcing bars.

Applications

• Identification and description of load-bearing structures: buildings, bridges, slabs, beams and columns.
• Assessment of steel reinforcement condition: corrosion and concrete carbonation.
• Quality control of completed works: concrete cover, rebar diameter and mesh layout.
• Detection of cavities, internal defects or degraded zones.

These measurements are non-destructive and can be performed on all types of reinforced concrete structures. STRATAGEM974 also provides additional services such as core drilling, compression tests and foundation investigation surveys.

Turnkey solutions

We develop, supply and install turnkey solutions for measuring environmental, climatic, hydrological, volcanic or oceanographic parameters on all types of sites.

Fields of application

• Measurement of environmental parameters: climate, hydrometry, volcanology and oceanography.
• Assessment of solar or wind resources for production sites.
• Noise and vibration monitoring.
• Monitoring of deformations affecting civil engineering structures, buildings or rock masses.
• Underwater prospecting: archaeology, wreck detection, cables, ROVs and sonars.

Official representations

STRATAGEM974 is the official representative of Campbell Scientific® in the Indian Ocean region, and also provides solutions from specialized manufacturers such as GILL Instruments, JW Fisher, MadgeTech and Svantek for consulting, supply and installation of precision measuring equipment.

Regulatory studies

• Regulatory files: Water Law, public utility declarations.
• Preparation of ICPE files for classified installations.
• Environmental assessments and impact studies.

Sampling and pollution diagnostics

• Water, sediment and soil sampling.
• Analyses carried out by COFRAC-accredited laboratories.
• Pollution diagnostics on industrial sites, landfills or rehabilitation sites.
• Management plans and environmental monitoring.

Natural resource exploration

Our team also works on drinking water exploration, deep geothermal targets, exploitable materials, and the performance or interpretation of pumping tests.

Fields of application

• Civil engineering: cavity detection and assessment of ground mechanical parameters.
• Natural hazards: landslides, faults and discontinuities.
• Natural resources: aquifers, massive rocks and geothermal targets.
• Scientific research: volcanology and seismology.

Methods used

• Electrical resistivity tomography and electrical soundings.
• Seismic methods: MASW, refraction, down-hole and cross-hole surveys.
• GPR: Ground Penetrating Radar.
• Self-potential.
• Magnetics.

Quality approach

STRATAGEM974 is a member of College A of the AGAP Qualité association, which promotes a high-quality scientific approach for applied geophysics services. Since 2017, STRATAGEM974 has held the AGAP Quality Accreditation for “Direct Current Electrical Methods”.