Geological and Geotechnical Characterization of the Guadalupe Tuff Formation for the Proposed Metro Manila Subway

Author: Karen Joy R. Leobrera (MSCE), Roy Anthony C. Luna (MSCE), Ramon D. Quebral (PhD), John Michael B. Gargullo (MSCE), Patrick D. Nistal, Angela Kariza C. Ines, and Monica P. Baniquett

Presenter: Karen Joy R. Leobrera

The Philippines will soon have its first ever underground rapid transit line. In order to proceed with a safe and cost-effective design, the complicated geologic and geotechnical conditions along the subway alignment must be well-understood. The subsurface condition of the proposed subway alignment is generally characterized by the Pleistocene Guadalupe Formation, known as the Guadalupe Tuff Formation. This paper discusses in detail this formation in terms of its geologic and geotechnical properties. Results of a reasonably comprehensive preliminary investigation and testing consisting of borehole drilling, permeability testing, borehole scanning, seismic velocity logging and ultrasonic pulse velocity testing, as well as compression tests on intact rock cores are discussed.


: 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering (2019) – Taipei, Taiwan

For inquiries on how to obtain a copy of our publications and technical papers, please feel free to send us an e-mail at

Back to top