Understanding slope stability evaluations
A slope stability study is a geotechnical analysis that aims to verify whether a natural slope, an embankment, or an excavation wall can remain stable without sliding or collapsing. It relies on soil investigations (boreholes, tests, analyses) to determine its mechanical properties and assess the forces at play.
Using calculations or modeling, the engineer determines a safety factor indicating whether the slope is stable enough. If this factor is too low, reinforcement measures may be proposed, such as drainage, slope reprofiling, or the installation of retaining structures.
In short, this study makes it possible to anticipate the risk of sliding and to ensure the safety of the surrounding land and structures.
- On-site soil study to understand its nature and ability to safely support a slope.
- Analysis of the slope's shape and incline to identify potential risks of sliding or subsidence.
- Assessment of the impact of water (rain, drainage, water table) on land stability.
- Verification of slope safety levels through calculations to confirm whether it is stable or requires corrective measures.
- Clear recommendations tailored to the site are provided to minimize risks, such as improving drainage or reinforcing the slope.
FAQ
Our answers will help you better understand the purpose and steps of a slope stability study, whether it involves a natural slope, an embankment, or an excavation wall.
This information is essential for anticipating the risk of sliding and ensuring the safety of land, buildings, and surrounding infrastructure.
A slope stability study is recommended for excavation work, construction on sloping ground, embankment construction, or when a landslide is suspected.
It ensures that the ground does not pose a danger to people or structures.
All types of soil can be studied, whether clay, sandy, rocky or fill soils.
The analysis takes into account the nature of the soil, its stratification and its natural or work-altered state.
The engineer performs calculations and modelling based on the data collected in the field in order to evaluate a safety factor.
This factor confirms whether the slope is stable or whether it presents a risk of failure.
If the slope is not sufficiently stable, suitable solutions can be proposed, such as improved drainage, modification of the slope angle or installation of retaining structures to secure the site.
Without a study, the risk of slope failure or collapse may be underestimated, which can result in damage to buildings and infrastructure or endanger people’s safety.