Rock Slope Stability Analysis Using Terrestrial Photogrammetry and Virtual Reality on Ignimbritic Deposits

Area of Science:

• Geotechnical Engineering
• Geomorphology
• Remote Sensing

Background:

• Puerto de Cajas is a critical high-altitude passage requiring stability assessment.
• Existing methods for evaluating rocky massif stability can be time-consuming and costly.
• An unexplored area within Cajas necessitates a novel assessment approach.

Purpose of the Study:

• To present a rapid and cost-effective methodology for evaluating unexplored rocky slopes.
• To assess the stability of three specific slopes within Puerto de Cajas.
• To establish a foundation for a publicly accessible 3D repository for enhanced visualization.

Main Methods:

• Terrestrial photogrammetry was used for slope digitalization and point cloud generation.
• Geomechanical stations were established for data collection.
• Slope stability was analyzed using the Slope Mass Rating (SMR), Q-slope, and kinematic methodologies.
• Data validation was performed by comparing software-generated directional data with manual compass readings.

Main Results:

• Terrestrial photogrammetry successfully captured detailed terrain features.
• Results from the SMR system showed close alignment with kinematic analysis, indicating satisfactory slope quality.
• The study validated the effectiveness of the rapid assessment approach.

Conclusions:

• The implemented rapid and cost-effective methods are suitable for evaluating unexplored rocky slopes.
• Continued stability control is essential for road safety and preserving the integrity of Puerto de Cajas.
• The development of a 3D repository will enhance research collaboration and visualization capabilities.