Geotechnical

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The stability of a structure depends on the integrity of its foundations. Our team performs geotechnical studies using the latest technologies to determine the composition and properties of the soil and rock where you plan to build. The results of these studies will allow your designers to produce plans and specifications that take into account the correlation between the structure’s requirements and the land, as well as the various factors that may affect the longevity of your building.

 

Our services include:

  • Geotechnical investigations to identify soil, rock, and groundwater conditions
  • Geological and pedological investigations
  • Hydrogeological investigations
  • Rock mechanics
  • Photogeology
  • Geotechnical modeling
  • Behavior evaluations of conventional foundations, piles, caissons, temporary and permanent earth retaining structures, supported slopes, landfill, earth dykes, raft foundations, highways, roads, large diameter culverts, wharves, storage tanks, etc.
  • Preparation of reports pertaining to the design of all structural components bearing on or retaining soil or rock, including appropriate construction methods and precautions
  • Instrumentation and analysis of foundations, earth-retaining structures, bedrock faces and embankments
  • Construction inspection during the installation of foundations, piles, shoring, and earth structures
  • Drainage, erosion control, and land layout
  • Experience in new and special construction methods such as ground stabilization fabrics, Styrofoam insulation, dynamic consolidation, reinforced earth and gabion earth retaining structures, grouted steel bars, and composite mass
  • Failure analysis and remediation scenarios for retaining walls, slopes, shorelines, etc.
  • Assessment, design, and supervision of the rehabilitation of pavement structures
  • Cost analysis, budget estimates, management, and design of earthworks
  • Analysis of existing designs and specifications

Field Testing:

  • Piezocone
  • Piezometer
  • Scissometer
  • Pressiometer

Laboratory Testing:

  • Granulometry
  • Unconfined compressive strength test
  • Consolidation testing
  • Multi-stage triaxial shear tests

Analysis of pavement and pavement structures

  • Qualitative statement (visual evaluation, general condition of the surface)
  • Quantitative statement (rate and severity of deterioration, rutting, International Roughness Index)
  • Statement on the mechanical characteristics (residual mechanical properties of the pavement structure and infrastructure: California bearing ratio module, constraints and allowable deformations)

Diagnosis

  • Origin and cause of deteriorations by section and sector
  • Priority of interventions

Presentation of deterioration on a plan with geodetic references

Solutions adapted and optimized according to existing structural characteristics

  • Reconstruction using recycled materials
  • Rehabilitation
    • Surface treatment
    • Stabilized foundation
    • Structural reinforcement
  • Thin and structural re-surfacing
    • System to reduce cracking

Technical analysis and economical solutions

  • Empirical and mechanically determined conception approach
  • Rehabilitation program amortized over time

Quality control of procedures

  • Laboratory analysis
  • Quality control on-site
    • Quality control of evenness
    • Standard quality control of materials

Evolving with the times (retrieving results, supervision, and assessment)

GHD Library

The GHD library is a collection of relevant resources to this service line.