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ENPT
Case Studies

Infrastructure: Rio Underground Metro

The Challenge

Extension of the Rio underground metro, requiring three new ventilation shafts (two 4.1m in diameter at a depth of 100m, and one 5m in diameter at a depth of 100m)

Our Solution

Master Drilling addressed the following project challenges:

Pilot holes had to be drilled without deviation

Restricted access to site was resolved through the construction of custom-made ramps so that drilling machines could be transported to the appropriate areas

Operating hours were reduced to between 08:00 am and 22:00 pm, and noise levels had to be kept to a minimum as a result of surrounding residential areas

Effective stakeholder engagement with all parties involved and an emphasis on effective environmental management procedures

The Result

Project completed on time, within budget and without deviation

100% safety record achieved during the duration of the project

Measured scope

Project facts

Type of drilling type
Raise boring
Machine
Raise bore rig 009H
Excavation depth (m)
3 x 100m holes
Diameter
2 x 4.1m 1 x 5m
Geology
Competent
Contractor
Odebreght
Project Owner
Rio Metro