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Luck Stone Fairfax Plant – Inspection Works

Service Performed
In-depth inspection of a connector tunnel in accordance with TOMIE manual and the SNTI manual of the U.S. Department of Transportation - FHWA.
Commencement - Services
July 01, 2016
Completion - Services
July 31, 2016
Location
15717 Lee Hwy
Centreville, VA, VA 20121
United States
Geology description

The prevalent rock type of the tunnel is diabase. The rock mass is moderately jointed, with closely to very closely spaced joints. The rock is slightly weathered.

Geology types
Description

Inspected tunnel connects two quarries at the Luck Stone Corporation Fairfax plant. The tunnel crosses beneath the Lee Highway (US Route 29), in a North-South direction. Built ca. 1975, the tunnel is partially unlined and in rock; approx. 190 feet long and approx. 22 feet wide and 22 feet high. As the Northern quarry side is already exhausted, the tunnel is rarely used with just one or two transits per day.
Dr. Sauer & Partners performed an in-depth inspection of a connector tunnel; assessed the tunnel condition and provided remedial measures.

Activity
Service areas
Construction methods
Tunneling under
Road
Connector Tunnel - North Portal / Highwall
Connector Tunnel - South Portal / Highwall
Project number
242E1
Final cost
n/a

Combined Sewage Storage Tunnel (CSST)

Service Performed
Dr. Sauer & Partners provided geotechnical engineering, waterproofing & water control as well as instrumentation & monitoring support.
Commencement - Services
February 01, 2016
Location
110 Laurier Avenue West
Ottawa, ON K1P 1J1
Canada
Geology description

The alignment of the tunnels mainly crossing limestone formations with laminated black shales of varying thickness and locally glacial till.

Geology types
Description

The Combined Sewage Storage Tunnel (CSST) project is part of the Ottawa River Action Plan (ORAP) and will greatly reduce the frequency of sewage overflows during storms from entering the Ottawa River. The project consists of the design and construction of two TBM tunnels running east-west and north-south along 6.2km in total, also access shafts incorporating drop structures. The storage volume will be 43,000m3. Dr. Sauer & Partners supported the contractor with the preparation of the feasibility study on the TBM utilisation and also assisted with the clarifications on ground water drawdown risks and pre-excavation grouting criteria justification.

Activity
Categories
Final cost
$232,000,000
Construction methods
Special Construction techniques
Tunneling under
Building, Road
CSST map (http://ottawa.ca)
Excess wet weather flow is sent to CSST (http://ottawa.ca)
Project number
481C
Final cost
$232 million CAD
Completion date
Ongoing

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
Construction methods
Tunneling under
Building, Road
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
Construction methods
Tunneling under
Building, Road
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

Reshen Kalimash Motorway Project

Service Performed
Dr. Sauer & Partners in joint venture with iC Consulenten provided mitigation and tunnel stabilisation as well as NATM redesign following a tunnel collapse.
Commencement - Services
November 01, 2009
Completion - Services
July 01, 2010
Location
Sami Frasheri No. 33
Tirana
Albania
Geology description

The geological setting is influenced by the Alpine geosyncline resulting in a complex tectonic behaviour of a variety of igneous and metamorphic rocks cut by major fault zones.

Geology types
Description

A major collapse during construction of the Thierre Tunnel in 2009 led government officials to call on NATM experts to come up with an innovative fix for the 5.6km, two-lane twin tunnel, which is part of the new Reshen Kalimash Motorway. Recommended stabilisation measures by the Dr. Sauer/iC JV such as backfilling, ribs and fibre shotcrete were implemented and halted creep movements. An alternative design was developed and replaced the original horseshoe profile by an ovoid shape. Pre-treatment, excavation works and support installation were accompanied by extensive monitoring.

Activity
Final cost
$1,000,000,000
Construction methods
Tunneling under
Road
Stabilisation measures: Backfill and fibre shotcrete "egg"
Ovoid shape emerging from horseshoe profile
Project number
428E
Final cost
$1 billion USD

Edmonton Light Rail

Client
Service Performed
Dr. Sauer and Partners provided construction support services and supervision of the excavation of the Light Rail Tunnels, which were constructed using NATM.
Commencement - Services
August 01, 2011
Completion - Services
January 01, 2013
Location
1 Sir Winston Churchill Sq NW
Edmonton, AB T5J 2R7
Canada
Geology description

Glacially controlled terrain comprising clay, silt and sand deposits underlain by Mesozoic bedrock consisting of sandstone and shale.

Geology types
Description

The City of Edmonton built a 3.3km Light Rail Train extension from Churchill Station to the Northern Alberta Institute of Technology. Approximately 670m of the extension are underground consisting of ca. 430m of twin tunnels of 6m nominal diameter. NATM/SEM tunneling was applied. The software 2DOC, which was at that point used in North America for the first time, allowed real-time tracking of all geotechnical instruments on the project, as well as the recording of the actual geotechnical conditions and the grout support elements installed.

Activity
Final cost
$300,000,000
Construction methods
Tunneling under
Building, Road
Excavation under way
Tunnel face
Project number
437E
Final cost
$300 million CAD

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
Construction methods
Tunneling under
Building, Road
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
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
Tunneling under
Building, Road
Route map
Overall station layout, headhouse and caverns (Rendering by JV)
Project number
358D1
Final cost
$1.6 billion USD

Crossrail 2

Client
Service Performed
Provide SCL project services, supporting main tunnel-stations-alignment workstreams, design of tunnel cross sections, SCL design principles, geotechnical review and risk assessment.
Commencement - Services
January 01, 2015
Location
22 Carlisle Place
London
SW1P1JA
United Kingdom
Geology description

The geology is expected to be highly variable crossing most of the typical units of the London basin (river terrace deposits, London Clay, Lambeth Group, Thanet Sand).

Geology types
Description

Crossrail 2 is a proposed new rail infrastructure project, aiming to alleviate further crowding and congestion across London. The proposed central route will provide a link between Wimbledon in the South and New Southgate and Tottenham Hale in the North with a provision for an Eastern branch towards Hackney Central. It will provide interchange with multiple London underground, London Overground, Crossrail 1, national and international rail services. It is expected to increase significantly the capacity of the regional rail network and reduce the journey times supporting the population growth of the City of London.

Activity
Construction methods
Tunneling under
Building, Rail, Road
Proposed route according to public consultation autumn 2015
Crossrail 2 in numbers (www.crossrail2.co.uk)
Project number
476C
Final cost
£30 billion GBP
Completion date
Ongoing

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