Urban Highway Tunnel

Taguatinga Tunnel

Owner

METRO Brasilia

Client

Bureau Sao Paulo / BRAS METRO

Service Performed

Doorframe Slab Design Review and Construction Advice

Commencement - Services

December 30, 1997

Completion - Services

December 29, 1999

Location

Brasilia -

Brazil

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

Soft ground

DTSS T05

Owner

Ministry of the Environment, Environmental Engineering Division Sewerage Dept.

Client

TY Lin

Service Performed

Design and Construction Supervision of Shafts and Access Tunnels

Estimated cost

$75,800,000

Commencement - Services

December 01, 1998

Location

Singapore

Technical data

Section T02 comprises 7716 of 6m inner diameter sewerage tunnel, 6 permanent access shafts and 3 lateral access tunnels connecting the access shafts with the sewerage

Geology description

Light gray to medium gray slightly to moderately weathered Petersburg Granite (quartz, hornblende, biotite); dark grayish, slicken-sided Amphibolite layers (biotite, hornblende, feldspar);