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Tunnel Design & Specialities

Leesburg Inter-Quarry Tunnel - Design

Service Performed
Conceptual design with various tunnel options. Final tunnel design consisting of drawings, specifications, and calculations. Client support during bid phase.
Commencement - Services
January 01, 2017
Completion - Services
April 01, 2018
Location
Leesburg Plant
20210 Luck Lane
Ashburn, Virginia, VA 20147
United States
Geology description

Located within the Culpeper Basin, a sedimentary rock formation characterized to be of Lower Mesozoic Age. The existing Luck Stone quarry is situated in a Diabase intrusion (dyke) of this sedimentary rock.

Geology types
Description

Luck Stone Corporation (LSC) planned to open a new quarry on the Western side of Goose Creek river, a component of the Virginia Scenic Rivers System. A tunnel was envisioned to connect the new Western quarry with the existing South-Eastern one below the river. The rock cover between the tunnel and the river was approximately 50 feet. The tunnel is 1275 feet long with a diameter of 45 feet. It is designed to accommodate large scale mining trucks as well as a conveyor belt for material transport which is scheduled to be installed in the future.

Activity
Service areas
Tunnel Design & Specialities
Construction methods
Special Construction techniques
Tunneling under
South-East portal excavation sequence
South-East portal excavation
Vertical bench drilling
Project number
242D
Final cost
$13 million USD

HS2 Euston Station

Client
Service Performed
Tunnel design (geometry, linings, alignment, connections); BIM/CAD; survey scopes; conceptual design statement.
Commencement - Services
February 01, 2018
Completion - Services
August 01, 2019
Location
Two Snowhill
London
Birmingham
B4 6GA
United Kingdom
Geology description

London Clay, Lambeth Group (Reading, Woolwich and Upnor Formations).

Geology types
Description

Euston Station will be transformed as the London terminus for HS2. The project involves building a new station alongside the Network Rail station and creating over 600m of new tunnelled connections to the Euston London Underground (LU) station. The works include two new sets of escalators serving the Victoria line and Northern line Bank branch and three new lifts providing step-free access to all lines. Tunnel diameters range from 3.6m to 11.5m with most tunnels being constructed using sprayed concrete lining. In the tightest locations squareworks tunnels have been designed.

Activity
Service areas
Tunnel Design & Specialities
Construction methods
Existing station and its context
New tunnels (cyan) connecting HS2 and LU platforms
Project number
489D2
Final cost
£1.6 billion GBP

Bank Station Capacity Upgrade - Pile Interceptions

Service Performed
Design of tunnels where they intercept with existing building foundation piles (i.e. at four building locations).
Commencement - Services
August 01, 2013
Completion - Services
May 01, 2022
Location
London
London
EC3V 3LA
United Kingdom
Geology description

The geology comprises London Clay formation overlain by Quaternary superficial deposits and made ground.

Geology types
Description

Bank Station is a London Underground station located in the City of London financial district. It is a key interchange served by five existing lines. The Bank Station Capacity Upgrade (BSCU) comprises the construction of new tunnels adjacent to and connecting with the existing tunnels. The capacity upgrade includes the construction of 540 metres of running tunnel intercepting with existing foundation piles at four no. building locations. A bespoke solution was developed for each of the buildings and the building impact was assessed in detail.

Activity
Service areas
Tunnel Design & Specialities
Construction methods
Tunneling under
Running tunnel intercepting with existing foundation piles
Exposure of pile during running tunnel construction
Project number
451D
Final cost
£563.8 million GBP

Thames Tideway

Owner
Service Performed
Review of the current design of the connection between sprayed concrete lined connection tunnels and the main (TBM) tunnel with the aim to propose efficient alternatives.
Commencement - Services
March 01, 2016
Location
80 Kirtling Street
London
SW8 5BP
United Kingdom
Geology description

The geology transitions from West to East through London Clay, into the complex Lambeth Group (clay, sand and gravel strata) into Thanet Sands, before giving way to the Chalk including flints.

Geology types
Description

The Thames Tideway Tunnel is an under-construction 25km tunnel running mostly under the tidal section of the River Thames through central London. It will provide capture, storage and conveyance of almost all combined raw sewage and rainwater that currently overflow into the river. Once constructed, the main tunnel will have an internal diameter of 7.2m and will run from -30m at Acton, West London for over 25km under central London down to -70m at Abbey Mills in the East. It will connect 34 of the most polluting combined sewer overflows (CSOs), via transfer tunnels. The tunnel will transfer the captured sewage to the Stratford to East Ham part for onward delivery to Beckton Sewage Treatment Works.

Activity
Categories
Service areas
Tunnel Design & Specialities
Construction methods
Tunneling under
New shaft, connection and main tunnel structures (Courtesy Tideway)
Isometric of connection between SCL and TBM tunnels
Project number
502C
Project Type
Final cost
£4.2 billion GBP
Completion date
Ongoing

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 TYROL
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. Site supervision during SEM construction
Commencement - Services
November 01, 2015
Completion - Services
December 01, 2021
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 has  been utilised. Finite element analyses were carried out to determine structure capacity of linings and trigger values. Fibre reinforced sprayed concrete was used for temporary and permanent linings.

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

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