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Tunnel Design & Specialities

Brenner Base Tunnel - Lot H51 Pfons-Brenner

Owner
Service Performed
Dr. Sauer & Partners provided tender support services.
Commencement - Services
December 01, 2016
Completion - Services
April 18, 2017
Location
Innsbrucker Bundesstraße 67
5020 Salzburg
Austria
Geology description

Located within the Alps, the geology comprises phyllite, schist, marble and gneiss including main fault zones as well as major water ingress sections combined with a maximum overburden of 1300m.

Geology types
Description

The Brenner Base Tunnel (BBT) is a 64km long railway tunnel connecting Austria and Italy. Once completed, it will be the world's longest rail link underground. In addition to the two main tubes, the project comprises a complex set up of exploration adits, crosscuts, emergency stops and additional access tunnels, excavated by TBM and SCL methods. Dr. Sauer & Partners provided tender support services for the 18km lot H51 Pfons-Brenner and was responsible for creating the bid documents as well as conducting QA/QC services. The documents covered issues such as TBM choice, annular gap filling, reuse of excavated rock, rail delivery of construction materials, construction logistics and pre-excavation grouting.

Activity
Categories
Service areas
Tunnel Design & Specialities
Construction methods
Max Overburden
1300
BBT alignment (courtesy of BBT SE)
Lot H51 alignment (courtesy of BBT SE)
Project number
486C
Final cost
€1.3 billion EUR

University Link - Design

Service Performed
Sub-consultant for NATM/SEM design and waterproofing design.
Commencement - Services
July 02, 2007
Completion - Services
January 02, 2009
Location
401 S. Jackson Street
Seattle, WA 98104
United States
Geology description

The geology along the alignment consists of over-consolidated glacial clay and till with fractured zones, as well as sand and silt layers.

Geology types
Description

University Link is a 5km light rail extension that runs in twin-bored tunnels from Downtown Seattle north to the University of Washington, with stations at Capitol Hill and on the University of Washington campus. The twin-bored tunnels are connected with 20 cross passages. Dr. Sauer & Partners performed the temporary and final support design for the cross passages. This included the design of excavation and support measures and the development of specific ground support categories, settlement analyses, and the structural analyses of initial and permanent lining.

Activity
Service areas
Construction methods
T Cross Passage
3D Finite Element Model
Project number
262D
Final cost
$1.6 billion USD

Crossrail C121 SCL Design CAT3 Check

Service Performed
Specialist sub-consultant for the analysis, design check, and design improvement recommendations of SCL structures.
Commencement - Services
January 01, 2011
Completion - Services
December 01, 2013
Location
25 Canada Square
London
E14 5LQ
United Kingdom
Geology description

The SCL tunnels are located in London Clay and Lambeth Group with overlying strata of terrace gravels and made ground.

Geology types
Description

Crossrail is a 118km railway line along an east-west route across London. Its central section runs via 21km twin-bore tunnels connecting eight underground stations and represents one of the world's largest infrastructure projects. Dr. Sauer & Partners was assigned to provide Category III independent design checking services on the Sprayed Concrete Lining works for the complete Whitechapel and Fisher Street SCL structures. Additional 3D non-linear FEA and assessments were carried out for the wraparound and junction structures of the Liverpool St Station and the Bond St Station.

Activity
Service areas
Geological Engineering, Tunnel Design & Specialities
Construction methods
Tunneling under
FEM results of binocular structure at Fisher Street Crossover
Fisher Street Crossover under construction
Project number
222C2
Final cost
£16 billion GBP

Tel Aviv Metro - Red Line

Service Performed
Dr. Sauer & Partners provides services as Checking Engineer for the design of all underground tunnels (NATM & TBM) and Cut and Cover structures.
Commencement - Services
April 01, 2011
Location
26 Harokmin St.
Tel Aviv
Israel
Geology description

The geology comprises predominantly sand and cemented dune sands called Kurkar, but also clay.

Geology types
Description

The Red Line will link the most congested areas of the city of Tel Aviv, operating along 24km and serving 34 stations. The light rail trains will run above ground as well as through a tunnel section of 11km length, connecting ten underground stations. Excavation of the twin tube tunnels will be undertaken by TBMs. The tunnels will be connected by cross passages spaced at a maximum distance of 250m. Station boxes will be constructed using diaphragm walls and piles. The Red Line should start its operation by 2021 and transport 70 million passengers per year.

Activity
Final cost
$300,000,000
Service areas
Tunnel Design & Specialities
Construction methods
Tunneling under
Route map (www.nta.co.il/en/line/73)
Galei Gil Shaft to be used to launch TBMs
Project number
362C1
Final cost
$3 billion USD
Completion date
Ongoing

Los Bronces Mine

Service Performed
Dr. Sauer & Partners provided conceptual design and basic engineering.
Commencement - Services
August 01, 2009
Completion - Services
November 01, 2011
Location
Los Andes
Valparaíso
Chile
Geology description

The geological setting is dominated by the volcanic activities of the region and includes magmatic rocks such as monzonite, andesite, and dacite.

Geology types
Description

Los Bronces copper mine, an open-pit operation at an altitude of 3500m ASL in the Chilean Andes, planned to utilise a tunnel for further deposit exploration and development. The project consisted of an 8.2km tunnel link between Los Bronces and Confluencia, connecting two processing plants. By applying drill and blast methods, a chamber was prepared to launch a 4.5m diameter tunnel boring machine which took over further excavation. A difficult geological and hydrological setting, extreme weather conditions as well as the high altitude and the rough terrain, provided a challenging environment.

Activity
Final cost
$6,000,000
Service areas
Geological Engineering, Tunnel Design & Specialities
Construction methods
TBM Tunel Sur (http://www.construccionminera.cl)
Tunnel excavation with TBM
Project number
432C
Final cost
$6 million USD

Eglinton Crosstown LRT

Owner
Service Performed
Preliminary and final SEM tunnel design.
Commencement - Services
November 01, 2015
Location
97 Front Street West
Toronto, ON M5J1E6
Canada
Geology description

Glacial depositional systems created a complex distribution of heavily overconsolidated till layers, separated by interstadial stratified deposits of glaciolacustrine clay, silt, and sand.

Geology types
Description

The Crosstown is a light rail transit line, which is part of the regional transportation plan for the Greater Toronto and Hamilton Area. The project will provide a 19km corridor across Eglinton Avenue, connecting ten stops at grade and 15 stations with a 10km twin-bored tunnel. Dr Sauer & Partners provided detailed design for Oakwood, Avenue, Laird and Leaside stations. A combination of Cut-and-Cover construction for the shafts and mined techniques (SEM) for the tunnels will be utilised. Finite element analyses were carried out to determine structure capacity of linings and trigger values.

Activity
Service areas
Tunnel Design & Specialities
Construction methods
Tunneling under
Route map (www.thecrosstown.ca)
Toronto transit map (www.thecrosstown.ca)
Project number
467D
Final cost
$4.9 billion CAD
Completion date
Ongoing

Silverline Phase III

Service Performed
Sub-consultant for NATM design.
Commencement - Services
January 01, 2003
Completion - Services
January 01, 2008
Location
500 Arborway
Boston, MA 02130
United States
Geology description

Made ground, peat, glacial till (cohesive, plastic), Boston Blue Clay and sand.

Geology types
Description

Silver Line Phase III is an underground extension of the Silver Line from the current terminal at South Station into Downtown Boston. The tunnels through Boston's Chinatown lie up to 25m below surface and include ca. 1400m long-running tunnels, two stations and complex underground junctions. The NATM design alternatives for LRT / Busway tunnels are located beneath existing subway stations and running tunnels. 3D modelling tools were utilised to create multiple alignments.

Activity
Final cost
$550,000,000
Service areas
Tunnel Design & Specialities
Construction methods
Tunneling under
3D rendering of the Silverline Phase III alignment
NATM alternative beneath MTA's Chinatown Station
Project number
347D1
Final cost
$550 million USD

Central Subway

Service Performed
Preliminary and final SEM tunnel design at Chinatown Station.
Commencement - Services
March 01, 2010
Completion - Services
May 01, 2012
Location
425 Market Street Suite 1700
San Francisco, CA 94105
United States
Geology description

The geology ranges from soft clay (Bay Clay) to stiff sands (Colma Sands) and competent to highly fractured rock (Franciscan Formation). A considerable part of the tunnel alignment is below the groundwater table.

Description

MUNI planned a 2.7 km underground extension to the Third Street Light Rail Project. The underground section would start near Bryant Street, run along Third Street, cross under four BART Tunnels at Market Street and continue under Geary and Stockton Streets to Clay Street. Dr.Sauer and Partners was the designer for the SEM Tunnel Structures at Chinatown Station and prepared detailed excavation and support sequences as well as procedures for the construction of the large caverns and final design documents for SEM construction.

Activity
Service areas
Tunnel Design & Specialities
Tunneling under
Route map
Overall station layout, headhouse and caverns (Rendering by JV)
Project number
358D1
Final cost
$1.6 billion USD

Exchange Place Station - Path Line Improvements

Service Performed
Tunnel excavation geometries, lattice girder geometries and layout.
Commencement - Services
October 01, 2002
Completion - Services
October 01, 2003
Location
225 Park Ave S
New York, NY 10003
United States
Geology description

Heavy foliated gneiss, schist, schistose gneiss with pegmatite intrusions occasional amphibolite; transitional (slope/rise) rock.

Geology types
Description

Exchange Place is a key station on the PATH commuter rail service between New York and New Jersey. After the World Trade Center collapse, the station and river crossing running tunnels were closed. Precautions were taken to prevent flooding of the subway system from broken water mains and sewer lines. Turning existing elements into a terminus and extending the platform tunnels by 45m involved excavating new crossovers, modifying the 5 existing tunnels, raising the invert and crown up to 3m and back filling unneeded tunnel spaces to create the ground in which new spaces could be excavated.

Activity
Final cost
$25,000,000
Service areas
Tunnel Design & Specialities
Construction methods
3D Model of Exchange Place station
Lattice girder and shotcrete for support
Project number
355D
Final cost
$25 million USD

Holborn Station Capacity Upgrade

Client
Service Performed
Feasibility study and conceptual design.
Commencement - Services
April 01, 2014
Location
Kingsway
London
WC2B 6AA
United Kingdom
Geology description

London Clay and Lambeth Group formation, which may contain water-bearing sand channels.

Geology types
Description

Holborn is a LU station in central London. It is served by the Central and Piccadilly lines. Demand for both lines at Holborn is high. The principal design challenges are the close proximity of the proposed tunnels to existing operational tunnels, complex tunnel geometry and alignments, limited clearance to existing buildings, restricted work sites and strict settlement criteria. The lining system is a double shell lining with both linings considered part of the permanent load bearing structure.

Activity
Final cost
$150,000,000
Service areas
Tunnel Design & Specialities
Construction methods
Tunneling under
3D visualisation of existing Holborn underground station
Archive photo of heading of escalator tunnel (1931)
Project number
471C
Final cost
£150 million GBP
Completion date
Ongoing

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