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Karst Detection, Prevention and Correction: A Case Study along the Riyadh Metro Line 3 (Saudi Arabia)

1
IDOM, Avda. Monasterio de El Escorial 4, 28049 Madrid, Spain
2
Department of Geology, University of Oviedo, Jesús Arias de Velasco s/n, 33005 Oviedo, Spain
*
Author to whom correspondence should be addressed.
Presented at the 2nd International Research Conference on Sustainable Energy, Engineering, Materials and Environment (IRCSEEME), Mieres, Spain, 25–27 July 2018.
Proceedings 2018, 2(23), 1429; https://doi.org/10.3390/proceedings2231429
Published: 6 November 2018
In the framework of the largest urban-transit system ever built from scratch, the Riyadh Metro Project (6 lines totaling 176 km), a comprehensive investigation was carried out for karst detection, prevention and correction. This case study of the Metro Line 3 (41.6 km) seeks to show how the multi-technique geophysical survey (seismic refraction, electrical resistivity and ground penetration radar down to 40–50 m depth) was found to be a successful tool in detecting karst features. Preventive measures included systematic probing drilling to anticipate karst cavities below foundations (653 piers) and tunnel lining evaluation using 2D finite elements. Finally, this paper provides initial guidance of the corrective techniques used for each engineering challenge, such as cavity filling with grouting, geogrid reinforcement, etc.
Keywords: karst; engineering geology; Riyadh; Metro Line 3 karst; engineering geology; Riyadh; Metro Line 3
MDPI and ACS Style

Cueto, M.; De la Puente, P.; López-Fernández, C.; Pando, L.; Arias, D. Karst Detection, Prevention and Correction: A Case Study along the Riyadh Metro Line 3 (Saudi Arabia). Proceedings 2018, 2, 1429.

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