Slope Stability

Metra Consultation provides slope-stability assessment, analysis, and engineering recommendations for natural slopes, embankments, excavations, retaining systems, waterfront properties, roads, and development sites throughout Québec.

Slope instability can affect public safety, buildings, roads, utilities, neighbouring properties, and the feasibility of a proposed development. Our geotechnical, civil, and structural teams evaluate the conditions controlling slope behaviour and develop practical stabilization or risk-management solutions.

Our Services

Our slope-stability services may include:

  • Site reconnaissance and visual inspection

  • Review of topographic, geological, and historical information

  • Boreholes, test pits, and soil sampling

  • Groundwater investigation and monitoring

  • Identification of erosion and drainage concerns

  • Two-dimensional stability analysis

  • Evaluation of temporary and permanent slopes

  • Assessment of existing or proposed embankments

  • Evaluation of surcharge from buildings, roads, or stockpiles

  • Stabilization and drainage recommendations

  • Instrumentation and movement monitoring

  • Construction-phase geotechnical support

Conditions We Evaluate

Slope performance may be influenced by:

  • Soil and rock stratigraphy

  • Slope height and inclination

  • Weak or sensitive soil layers

  • Groundwater and seepage

  • Rainfall and snowmelt

  • Surface erosion

  • Toe excavation or watercourse activity

  • Added fill or structural loads

  • Vegetation removal

  • Previous slope movement

  • Nearby construction and vibration

  • Seasonal freeze-thaw effects

Stability Analysis

Where analytical evaluation is required, our engineers may assess:

  • Existing stability

  • Proposed grading conditions

  • Temporary excavation stability

  • Drained and undrained soil behaviour

  • Groundwater scenarios

  • Construction-stage conditions

  • Potential failure surfaces

  • Required factors of safety

  • Sensitivity to loading or water-level changes

The analysis is based on available field and laboratory data and may identify the need for additional investigation or monitoring.

Stabilization Solutions

Depending on the cause and geometry of instability, recommendations may include:

  • Regrading or flattening the slope

  • Removal or relocation of surcharge

  • Toe berms or buttresses

  • Surface and subsurface drainage

  • Erosion protection

  • Retaining walls

  • Reinforced-soil systems

  • Soil nails, anchors, or piles

  • Ground improvement

  • Controlled excavation and construction sequencing

  • Monitoring and movement thresholds

Solutions are evaluated for safety, constructability, access, environmental impacts, cost, and long-term maintenance.

Warning Signs

Potential indicators of slope movement may include:

  • Ground cracks

  • Bulging at the toe

  • Leaning trees, poles, or fences

  • Sudden seepage

  • Erosion channels

  • Settlement near the crest

  • Distortion of retaining walls

  • Pavement or foundation cracking

  • Repeated soil movement after rainfall or snowmelt

Sites exhibiting active or rapid movement should be assessed promptly and access to affected areas may need to be restricted.

Integrated Engineering Support

Metra Consultation coordinates geotechnical analysis with drainage, grading, retaining structures, foundations, roads, utilities, and BIM models. This integrated approach is particularly valuable where slope conditions affect a proposed building or site-development plan.

Contact Us

Contact Metra Consultation for assessment of an existing slope, proposed excavation, embankment, erosion concern, or development near sloping ground.