A Case Study of a Large Unstable Mass Stabilization: “El Portalet” Pass at the Central Spanish Pyrenees



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Cobos, Guillermo and Eguibar, Miguel Ángel and Torrijo, Francisco Javier and Garzón Roca, Julio (2021) A Case Study of a Large Unstable Mass Stabilization: “El Portalet” Pass at the Central Spanish Pyrenees. Applied Sciences, 11 (918). ISSN 2076-3417

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Official URL: https://doi.org/10.3390/land10090918


This case study presents the engineering approach conducted for stabilizing a landslide that occurred at “El Portalet” Pass in the Central Spanish Pyrenees activated due to the construction of a parking lot. Unlike common slope stabilization cases, measures projected here were aimed at slowing and controlling the landslide, and not completely stopping the movement. This decision was taken due to the slow movement of the landslide and the large unstable mass involved. The degree of success of the stabilization measures was assessed by stability analyses and data obtained from different geotechnical investigations and satellite survey techniques such as GB-SAR and DinSAR conducted by different authors in the area under study. The water table was found to be a critical factor in the landslide’s stability, and the tendency of the unstable slope for null movement (total stability) was related to the water table lowering process, which needs more than 10 years to occur due to regional and climatic issues. Results showed a good performance of the stabilization measures to control the landslide, demonstrating the effectiveness of the approach followed, and which became an example of a good response to the classical engineering duality cost–safety.

Item Type:Article
Uncontrolled Keywords:landslide, safety factor, Central Spanish Pyrenees, soft rocks, stabilization measures
Subjects:Sciences > Geology > Geodynamics
ID Code:67846
Deposited On:17 Sep 2021 18:32
Last Modified:20 Sep 2021 07:02

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