Technical Specialty


ZAÑARTU is Chile’s leading authority on this type of underground project, specializing in the various phases of work, from design engineering and technical inspection during construction, to support engineering, launch and operation. Globally, we have created more than 69 km of tunnels. We also conduct inspection of underground projects abroad, particularly in Colombia.

Thanks to our accumulated expertise, ZAÑARTU has become a specialist in the NATM method for excavation of soft soils and rock, the latter using the Drill and Blast method. We also have 16 years of experience working on the Santiago Metro, with completed work totaling over 20 km of tunnels inspected. A further 16 km of tunnels are currently at the design phase, specifically for the new Line 6.

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