Laboratoire d’Études et Contrôle d’Expertise Géotechnique
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Field 01 · Our core field

Geotechnics

Investigating and characterising soils and rocks to design and control foundations, earthworks and structures — from buildings to major infrastructure.

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LEGEC technicians during a pressuremeter test
G1→G5
NF P 94-500 missions
ASTM · NF
testing standards
Why a soil investigation?

A structure is never stronger than the ground that carries it.

A geotechnical study helps you choose the right type of foundation, avoid settlement and cracks, and control your project’s costs from the design stage.

Services offered

  • 01Core drilling and auger boreholes
  • 02Ménard pressuremeter tests, bearing capacity and settlement
  • 03Dynamic penetrometer tests and SPT
  • 04Plate load tests and load tests
  • 05Undisturbed and disturbed sampling
  • 06Laboratory tests: water content, particle size, Atterberg limits, Proctor, CBR, shear strength, oedometer, density, aggregate and fill material tests
  • 07Design of shallow and deep foundations
  • 08Retaining structures, basements, earthworks, platforms and pavements
  • 09Compaction control and site supervision
  • 10Diagnosis of defects: cracks, settlement, landslides
NF P 94-500 standard

Every mission, from study to diagnosis.

G1
Site study

Site specifics and general construction principles.

G2
Design — Preliminary & Detailed

Preliminary and detailed design: sizing of geotechnical structures.

G3
Construction

Geotechnical study and monitoring during construction.

G4
Supervision

Geotechnical supervision of the works on behalf of the project owner.

G5
Diagnosis

Analysis of an existing structure or an observed defect.

Pressuremeter Light drilling rig Los Angeles testing machine Weighing samples in the laboratory
Methods, standards & equipment

The laboratory comes to you.

Our tests follow ASTM and NF standards, including NF P 94-500 for geotechnical missions. The equipment of our mobile laboratory works directly on site.

Truck-mounted drilling rigs Light drilling rig Pressuremeter Rebound hammer Los Angeles test (aggregates) Sand equivalent
Sectors concerned
BuildingRoad infrastructureBridges & structuresEnergyWaterIndustryMining
What you receive

Deliverables

Geotechnical report

Borehole logs, results, interpretation and foundation recommendations.

Test reports

Every test documented and traceable, according to the applicable standard.

Design calculations

Justified bearing capacity, settlement and sizing.

How a mission works
  1. 01
    Request a quote
    You describe your project via the form or WhatsApp, 24/7.
  2. 02
    Investigation programme
    Number and depth of boreholes, tests to be carried out.
  3. 03
    On-site work
    Boreholes, in-situ tests and sampling.
  4. 04
    Laboratory testing
    Identification and mechanical properties of soils.
  5. 05
    Delivery of the report
    Interpretation and recommendations, presented if required.
Project examples

Our geotechnical projects.

All projects
Pylon constructionTomboPylon constructionSoil investigation for the pylon foundations.Power plantSouguétaPower plantGeotechnical monitoring of the power plant construction project.Buildings and apartment blocksGuineaBuildings and apartment blocksBorehole campaigns for foundation design.
In pictures

Our teams in the field.

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Pressuremeter test on a plotPressuremeter test on a plotLEGEC photoBorehole on a laterite roadBorehole on a laterite roadLEGEC photoLight drilling rig in townLight drilling rig in townLEGEC photo
Frequently asked questions

Have a question?

Do I need a soil investigation for a house or a building?

Yes: it helps you choose the right type of foundation and avoid cracks and settlement. A G1 or G2 mission is often enough for a standard building.

Do you work outside Conakry?

Yes, our mobile laboratory works throughout Guinea.

What documents are needed for a quote?

The site location, the type of structure and, if possible, the plans. You can attach them directly to the form.

What is the difference between G1 and G2?

A G1 study investigates the site and sets out general construction principles. A G2 study designs the project’s foundations and geotechnical structures.

Related services
Geophysics Land surveying Hydrogeology

A construction project?

Receive a tailored testing programme and quote.

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