Our areas of expertise

The expertise we bring to your projects, from field investigation to construction supervision, for public and private clients across Quebec.

Field investigations

Geotechnical and environmental investigations:

  • Conventional boreholes with SPT N-value measurement
  • Manual boreholes with sampling
  • Test pits
  • Seismic piezocone tests
  • Panda dynamic penetrometer
  • MASW for the seismic site class
  • Seismic lines for bedrock depth
Two Groupe LAFI technicians at the drill rig during stratigraphic drilling, in a snow-covered field

Environmental site assessment

  • Environmental site assessments for all phases (I to IV)
  • Chemical analysis of soils
  • Monitoring of decontamination work and final environmental certification
  • Support in obtaining permits and certificates of authorization
Technician recording a sample on a field sheet, at a site being assessed

Foundations and pavements

  • Calculation of soil bearing capacity at ultimate and serviceability limit states
  • Design of conventional foundations, driven and bored piles, helical piles and raft foundations
  • Design of pavement structures
  • Soil testing before construction
Aerial view of a foundation excavation on a construction site

Seismic risk

  • Liquefaction risk analysis using simplified and advanced approaches
  • Site class and seismic coefficients of the site
  • 1D and 2D numerical analyses for ordinary sites or for dikes and dams
  • Seismic risk reduction solutions when the risk is confirmed
Diagram of soil liquefaction: under seismic waves, liquefied sand rises and forms a sand boil at the surface

Ground improvement

  • Design of ground improvement techniques
  • Selection of the optimal technique: dynamic compaction, vibroflotation, preloading, vertical drains, stone columns, controlled modulus columns (CMC), jet grouting, deep soil mixing
  • Sizing and recommendations for the work
Crawler crane during ground improvement work

Slopes and retaining walls

  • Stabilization of banks and sloping ground
  • Design of retaining walls
  • Numerical analyses of the stability of slopes, embankments and existing walls
  • Gravity walls, sheet pile walls, combined walls and diaphragm walls
Excavator regrading a slope during stabilization work

Dikes and dams

  • Design of dikes and dams
  • Hydrological and hydraulic analyses
  • Dike stability: static, pseudo-static, internal and external erosion, liquefaction
  • Corrective recommendations for safety and maintenance
Aerial view of a dam and its dike

Construction supervision

  • Supervision of slope stabilization and retaining wall construction work
  • Quality control of soils, aggregates, concrete and asphalt throughout the work
  • Proactive health and safety presence on construction sites
Concrete pipes being laid on a municipal construction site, under a technician’s supervision

Have a project or a technical question?

Tell us about your project: our engineers will get back to you with a clear estimate, whether for a geotechnical study, an environmental site assessment or materials testing.

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