Regional-Scale Landslide Hazard Analysis in Sensitive Clays Using an Integrated Approach

DOI

10.2991/978-94-6463-258-3_10How to use a DOI?

Keywords

Back analysis; geological model; geotechnical parameters; landslide; sensitive clays

Abstract

The Saguenay region in Quebec is largely covered by sensitive marine clays that are highly susceptible to large retrogressive landslides. This work addresses the development of a methodology to forecast slope failure and zonation of landslides in sensitive clays. This is demonstrated by applying an integrated approach to the Saint-Jean-Vianney (SJV) area located in Saguenay. Developing the 3D model, assessing geotechnical parameters through back analysis using the Rocscience-Slide software, and creating a risk zonation map are the three crucial phases of the proposed methodology. The first phase involved generating a 3D geological model of the surficial deposits of the selected area using borehole data and geophysical methods. In the second phase, realistic values of geotechnical parameters of the soil were obtained by performing a back analysis of a previously occurred landslide in the area of interest and combining it with experimental results from clay specimens retrieved from the same landslide. In the final phase, a zonation map of slopes is created using the derived geological model and geotechnical factors to assess the slopes at risk. This screening tool enables the identification of high-risk zones that would require a more detailed investigation. The proposed approach provides a useful tool for slope stability analysis in areas with similar geological conditions.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Ali Saeidi
AU  - Blanche Richer
AU  - Rama Vara Prasad Chavali
AU  - Maxime Boivin
AU  - Alain Rouleau
PY  - 2023
DA  - 2023/11/08
TI  - Regional-Scale Landslide Hazard Analysis in Sensitive Clays Using an Integrated Approach
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 101
EP  - 108
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_10
DO  - 10.2991/978-94-6463-258-3_10
ID  - Saeidi2023
ER  -