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This study presents an integrated geotechnical analysis to evaluate the slope stability of a critical sector located along the lateral road of Ángel Felicisimo Rojas, near the Punzara lagoon in Loja, Ecuador. The site, characterized by steep slopes and weak lithological units such as silty sands, sandy clays, and weathered conglomerates, was identified as highly susceptible to landslides. A comprehensive methodological framework was employed, combining field surveys, geophysical profiling using the dipole-dipole method, laboratory soil classification, and shear strength testing. Mechanical properties such as cohesion and internal friction angle were determined and used to model slope stability under static and pseudo-static conditions using GEO5 software. The initial safety factor was found to be below recommended limits, indicating severe geotechnical risk. Through the evaluation of stratigraphic profiles and failure modes, the study outlines the potential failure mechanisms and proposes slope reinforcement strategies to mitigate hazards. This research underscores the importance of integrating geological, geomorphological, and geotechnical data to support informed engineering decisions in landslide-prone Andean environments.

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Integrated Geotechnical Assessment and Slope Stabilization of the Punzara Hillside in Loja, Ecuador: A Case Study Using Topographic, Laboratory, and Numerical Modeling Techniques

  • 会议论文

  • 发表日期：

    2026年

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  • José Luis Chavez Torres,
  • KunYong Zhang,
  • Tyrone Alexander Guarderas Cabrera,
  • Camila Nickole Fernández Morocho

摘要

This study presents an integrated geotechnical analysis to evaluate the slope stability of a critical sector located along the lateral road of Ángel Felicisimo Rojas, near the Punzara lagoon in Loja, Ecuador. The site, characterized by steep slopes and weak lithological units such as silty sands, sandy clays, and weathered conglomerates, was identified as highly susceptible to landslides. A comprehensive methodological framework was employed, combining field surveys, geophysical profiling using the dipole-dipole method, laboratory soil classification, and shear strength testing. Mechanical properties such as cohesion and internal friction angle were determined and used to model slope stability under static and pseudo-static conditions using GEO5 software. The initial safety factor was found to be below recommended limits, indicating severe geotechnical risk. Through the evaluation of stratigraphic profiles and failure modes, the study outlines the potential failure mechanisms and proposes slope reinforcement strategies to mitigate hazards. This research underscores the importance of integrating geological, geomorphological, and geotechnical data to support informed engineering decisions in landslide-prone Andean environments.