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Doorframe Slab Method

B 27 Bypass Tunnel Oberrieden

Owner
Hessish Road-Construction Authority, Eschwege
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
Design
Categories
Urban Highway Tunnel
Final cost
$12,500,000
Service areas
Site Supervision & CM, QA/QC
Special Construction techniques
Barrel Vault Method, Doorframe Slab Method
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

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

Owner
Massachusetts Highway Department
Client
VHB, URS, TAMS Joint Venture
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
Service areas
Documentation, Tunnel Design & Specialities
Special Construction techniques
Doorframe Slab Method

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
Categories
Urban Highway Tunnel
Final cost
$20,000,000
Service areas
Tunnel Design & Specialities
Special Construction techniques
Doorframe Slab Method
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

JFK International Airport - Access Tunnel

Owner
Port Authority of New York
Service Performed
Alternative design study
Commencement - Services
October 21, 2001
Completion - Services
October 21, 2001
Location
New York, NY
United States
Technical data

Two twin tunnels, rail and highway, with a total length of 2,000 ft (610 m) each.

Geology description

Hydraulically filled sand, organic silt, clay and peat, glacial sand, non-compacted fines and occasional gravel.

Geology types
Soft ground
Description

Design study on feasibility of construction of tunnels beneath active airport taxiway using systematic dewatering wells and Door Frame Slab Method.

Categories
Airport Tunnel
Final cost
$42,000,000
Special Construction techniques
Doorframe Slab Method
Proposed Construction Sequence
Cross Section and Excavation Steps