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Taguatinga Tunnel

Doorframe Slab Design Review and Construction Advice
Estimated cost: Commencement:
December 30, 1997
Completion date:
December 29, 1999
Brasilia -
Technical data:

Metro tunnel, 3,950 ft (1200 m) long with a section of approx. 660 sqft (62 m²). Overburden varied from 10 - 15 ft (3 - 5 m), reinforced concrete slab 2 - 4 ft thick.

Geology description:

Porous clay, sandy clay, weathered slate, weathered siltstone.

Geology types:
Bid cost: Final cost:
Service areas:
Surface Excavation
Installation of Supporting Piles
Start of Slab Construction
DFS - reinforcement, concrete slab partly completed
Clean Surface for Slab Reinforcement
Excavation for the DFS completed, I-beams installed, vaccum system
Installation of Slab Reinforcement
Reinforcement of DFS
Backfill of DFS