A city’s engineering department engaged Bentley’s geotechnical analysis team to train their staff to design a 3D geotechnical conceptual model, and turn over the project for ongoing engineering analysis to support current and future slope stability assessment projects. The project area, a 7-kilometer section of riverbank, ran through the city and required residential, commercial, and civic infrastructure considerations.
The eastern side of the riverbank experienced slope instability through various slope failure mechanisms. Specific slide locations had been analyzed with numerical modeling as part of previous reports prepared by a geotechnical firm. The city’s engineering department enlisted Bentley to provide a conceptual model and slope stability numerical models calibrated to the previous reports. The models will be used by the city to begin assessing a larger area of the riverbank in a more comprehensive manner. Bentley colleagues provided insights on data availability, how to account for input data variability, and recommendations on how to use the 3D conceptual and slope stability predictive models.
Critical slip surface calibrated to site investigation observations from previous engineering report.
The specific objectives of the investigation were to:
Predicted relative safety map over 1.5 km riverbank slope area.
Calibrated critical sliding mass for a slide location with a retaining wall.
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