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Urban Highway Tunnel

Boston Central Artery, Contract No. 95287-C11A1

Commencement - Services
December 28, 1995
Completion - Services
December 11, 2003
Location
Boston, MA
United States
Technical data

Road tunnel, 4 lanes, L = 3,940 ft (1200 m). Design of a mined solution to the engineers cut & cover tunnel design using NATM with various pre-support and groundwater cut-off measures, including barrel vaulting and cut-off walls.

Geology description

Glacial till (cohesive and granular) and weathered to unweathered argillite bedrock.

Geology Type: Hard Rock

Geology types
Description

Barrel Vault Method

Categories
Urban Highway Tunnel
Special Construction techniques
Cross Section MBTA Red Line Station
Cross Section and Support Measures
Proposed Cross Section near MBTA Bus Tunnel

B 27 Bypass Tunnel Oberrieden

Service Performed
Detailed design, instrumentation and construction supervision
Commencement - Services
December 28, 1990
Completion - Services
December 28, 1992
Location
Bad Sooden-Allendorf
37242 Oberrieden, Hesse
Germany
Technical data

Two lane road tunnel, 520 m length, construction techniques incl.: NATM, Doorframe Slab Method, Cut & Cover, Barrel Vault Method under existing railway embankment.

Geology description

Bunter Sandstone (sandstone, clystone), sand, clay and 120 year old railway embankment (rock fill, sand, clay, gravel).

Geology Types: Mixed Face

Description

The German Federal Railway Authority imposed high demands on safety since it did not allow for any disruption to railway traffic.

Barrel Vault Method, Doorframe Slab Method

Activity
Categories
Urban Highway Tunnel
Final cost
$12,500,000
Special Construction techniques
Canopy, start of shotcrete work
Canopy, anchor beam
Installation of the Barrel Vault
Portel under construction, barrel vault completed
Doorframe slap, I-beam installation
Installation of the barrel vault
Top heading
Sidewall drift, top heading, grouting of foundation aera
Sidewall drift, grouting at invert & bench
Sidewall Dirft, Bench
Side Drift Top Heading, Break Through
Cross Section, Excavation Sequences
Side Wall Drift, Temporary Shotcrete Invert at Top Heading
Sidedrift, Top Heading, Shotcreting
Installation of the Barrel Vault, Drill
Sketch of Railway Underpass
Finished Portal
Grouting at Invert and Bench
Installed Barrel Vault
Door Frame Slab, Open Cut for Slab Preparation
Portal Preperation
Pipes isntalled
Pipes installation at T.H.
Pipes installation at T.H
Installed barrel vault
History
Barrel Vault pipe/whole through
Test
Installed
Pump utilities
Installation of Pipes
Cement for grouting
Installation of pipes
Equipment Drill Rig
Drill device
Installation of pipes
In_Situ test
Project Overview and different Construction Methods
Excavation and Support Concept
Scheme of the Doorframe Slab Method
Doorframe Slab Method
Scheme of the Barrel Vault Method
Barrel Vault at S-Portal
Barrel Vault at N-Portal
Barrel Vault Pipe Installation
Shotcrete Canopy at S-Portal
Tunnel Portal beneath Active Rail Line
Shotcrete Middlewall
Finished Tunnel

Bus Tunnel

Service Performed
NATM Consultant
Estimated cost
$250,000
Commencement - Services
January 01, 1991
Location
Ottawa, ON
Canada
Technical data

2 single lane bus tunnels connecting four underground bus stations, 4200 m length approx. each.

Geology description

Sand, sensitive silty Clay, Shale and Limestone.

Categories
Urban Highway Tunnel

Dublin Port Access

Service Performed
NATM support works
Commencement - Services
December 30, 2001
Completion - Services
December 29, 2005
Location
Dublin
Ireland
Technical data

Bi-directional two lane road tunnels encompassing 5.6 km area. Total tunnel lenght: 4.5 km, TBM bored lenght: 2.4 km, each tube at 11.7 m diameter, Cut & Cover: 1.5 + 0.6 km.

Geology description

Dublin Boulder Clay (lodgement till), carboniferous argillaceous, limestone bedrock.

Geology types
Categories
Urban Highway Tunnel
Final cost
$5,000,000
Cut & Cover at Alfie Byrne Road
Formworks for Cut & Cover Section
Construction of Reception Shaft
Open Face TBM
TBM Launch Pit
Single Pass Lining Installation

Keller Springs Underpass Addison Airport Tunnel

Client
Service Performed
Preliminary design using NATM
Location
Dallas, TX
United States
Technical data

Two lane road tunnel, 1650 ft total length, NATM construction under existing runways in mixed face conditions.

Geology description

Soil, weathered and unweathered Limestone (Austin Chalk).

Geology types
Categories
Urban Highway Tunnel
Tunnel and road in use
 Tunnel Profile and Cross Section
Tunnel Portal during Excavation
Tunnel beneath active Runways

Ortsumfahrung B311

Service Performed
General Consultant for Design and Construction
Estimated cost
$21,000,000
Commencement - Services
March 22, 1994
Completion - Services
December 01, 1994
Location
Kirchham, Salzburg
Austria
Technical data

New Two Lane Roadway Tunnel constructed using NATM and Doorframe Slab Method, included 300m (900 ft) of approach ramps. Dimensions: Height 10.30m (~34’ ft) x Width 11.50m (~38 ft) Length: 700m (2,229 ft) Section: ~94m2 (1,033 ft2) Roadway Overburden: 5.15m (~17 ft)

Geology description

Sandstone

Categories
Urban Highway Tunnel

Boston Central Artery Project CTA I-93 / Tunnel I-90, C15A1 / C15A2

Service Performed
Value Engineering: Identification and Outline of Alternative Construction Techniques
Commencement - Services
December 23, 1996
Completion - Services
October 21, 2003
Location
Boston, MA
United States
Technical data

Complex layout of urban highway ramps with numerous off and on slips, intersections and over ramps. Mined tunnel option developed using primary shotcrete lining, with lattice girders, waterproofing and reinforced concrete secondary lining. Design of Alternative construction sequencing.

Geology description

Fill, Organic Silt, Fine Sand and Silt, Alluvium, Marine Clay, Glaciomarine Drift and Outwash, Glaciolacustrine sediments overlying Argillite and Hornfels bedrock at depth. Groundwater approximately 8ft below ground surface.

Categories
Urban Highway Tunnel

Boston Central Artery Project, C19E1 - I93 Leverett Circle / Storrow Drive Connectors

Service Performed
Detailed Design including Contract Documents
Commencement - Services
April 30, 1997
Completion - Services
October 22, 2003
Location
Boston, MA
United States
Technical data

Ramp S-N, two lane highway, total length 600 ft, span 41 to 48 ft. Doorframe Slab Method adopted in areas where the cover was < 10 ft. Utility room breakout and pump station shaft. Reinforced shotcrete primary lining; waterproofing system with a reinforced conrete secondary lining.

Geology description

Fill, Organic Silt, Fine Sand and Silt, Alluvium, Marine Clay, Glaciomarine Drift and Outwash, Glaciolacustrine sediments overlying Argillite and Hornfels bedrock at depth. Groundwater approximately 8 ft below ground surface.

Categories
Urban Highway Tunnel
Special Construction techniques

Channel Tunnel Rail Link, Contract 330: Pepper Hill Tunnel

Service Performed
Detailed Temporary and Permanent Lining Design, Settlement Assessment and Construction Supervision.
Commencement - Services
December 31, 1996
Completion - Services
December 30, 1997
Location
Kent
United Kingdom
Technical data

Approximately 14 m span twin track railway tunnel. Approximately 200m long. Using doorframe slab method.

Geology description

Superficial soil deposits, highly weathered Chalk and intact weak rock Chalk.

Geology types
Description

Rapid excavation of shallow cut (2m) for slab placement. Safe tunneling beneath operational highway. Minimal disruption to traffic

Categories
Urban Highway Tunnel

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