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Tom Middlebrook, Humberto FerrerDRAGADOS CANADAOct 5th, 2015
Challenges and Innovations in Tunnelling
Tunnelling Association of Canada Association Canadienne Des Tunnels
OCT 4 – 6, 2015 • Queens University • Kingston, ON Canada
Ottawa LRT Tunnel Construction Update
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Agenda
Self IntroductionDragadosOttawa LRT TunnelStation Construction Techniques
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Tom Middlebrook
Sr. Vice President, Business Development – Eastern CanadaDragados Canada
Previously…MMM Group – Urban MobilityMRC – Transit ConsultantToronto Transit Commission – Chief EngineerSmaller Construction Companies
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling4
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling5
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling6
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
• Argentina• Australia• Canada• Chile
• Colombia• Ireland• Greece• Peru
• Poland• Portugal• Spain• United States
• United Kingdom• Venezuela
Dragados ‐ Global Presence
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
In December 2005, Dragados USA began operating in the UnitedStates.
Dragados Canada opened its headquarters office in Toronto
December 2005
January 2008
North American Companies Acquired
Dragados in North America
8
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Major Projects Alternative Project Delivery Design‐Build Public Private Partnership (P3)
Bridges Highways and roads Railroads Mass transit Underground Airports
TransportationInfrastructure
Canals Caverns Dams Hydroelectric Power Plant Water Tunnels Water Supply
Water and Underground Concrete structures
Coastal WorkDredging and FillMarine WorkBeach RegenerationFloating EquipmentPortsDocks
Marine
Services and Areas of Expertise
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Create new urban spaces in
congested areas
Increase the quality of life
Sustainable growth
Free surface for citizens
Underground infrastructures
CITY BELOW THE CITY
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
NEW INFRASTRUCTUREIS BUILD FOR THE USER’S BENEFITHOWEVER DURING CONSTRUCTION THE NEIGBOURGHOOD IS DISTURBED
AMONG THE MULTIPLE TECHNOLOGIESWE ARE OBLIGED TO LOOK FOR THE LESS DISRUPTIVE ONES
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Traffic management
Social costFuel consumptionLonger journeysHigher carbon footprintHigher risk of accident
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Utilities relocation
•Water•Gas•Sewage•Phone•TV•Communications•Traffic control•Confidential org.•Unknown
RequestPermitsApprovalsRelocation by othersFinal green light
Project schedule and
cost(Lack of control)
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Business loss –SOCIAL COST
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Confederation Line, Ottawa
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
OTTAWA LRT TUNNELConfederation Line
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Rideau Transit GroupSponsors
Project Co
Design Build Joint Venture Maintenance Team
Equity Developers
Engineering Joint Venture
and others
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Confederation Line LRT 12.5 km project with 10km at grade in existing BRT Right‐of‐Way.
Biggest problem for the BRT was downtown – this has been solved by a 2.5 km tunnel from between uOttawa and Pimisi
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Underground works2.530 m running tunnel twin track
3 mined stations: Lyon, Parliament and Rideau
Lyon
Parliament
Rideau
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
OTTAWA Geology
Sound limestone interbedded with shale from the Lindsay and Verulam formations
Compress strength varies from 50 to 90 MPa and its RQD from 30 to 90
Overlaying this sedimentary ground, glacial deposits of clay and fines including a paleovalley at Rideau
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
DESIGN SCHEME
Pros Cons
SINGLE TUNNEL Lower CostFlexibility in operation
Higher risk of settlement minimize by rock quality
TWIN TUNNELMultiple facesOverlapping of
construction activities
Higher cost and schedulePotential impact
on building basement
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
EXCAVATION PROCEDURES
Pros Cons
TBMSpeed
Open modeOne pass lining
PaleovalleyPossible damage to building basement
Coordination with stations1.5‐2 years TBM procurement
Drill & BlastSpeed
EconomyMulti face
Urban restrictionsNoise
Vibrations
MechanicalFlexibility, Geometry
Multiple facesMobilize quickly
Lower speed / face
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
MECHANICAL EXCAVATION
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
30 m3/h
MECHANICAL EXCAVATION
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
3 ROADHEADER SANDVIK MT‐720
6 SCOOPTRAM CAT R1600G
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
SITE ORGANISATION
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
WEST PORTAL
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Intermediateshaft
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
East Portal
Apartment complex
Ottawa UniversityOttawa
University
University residential complex
EAST PORTAL
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Running tunnel
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Running tunnel
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Running tunnel
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Innovations in Tunneling
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Station Construction Challenges
• Large Span ~18 m
• Low Overburden ~10 m
• Significant Potential for impact on buildings
• Obstructions: rock dowels & tie backs
• Mixed Ground Conditions
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
LYON Station
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Utilities
Low rock cover
Adjacentbuildings
Rock boltsand tie backs
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
OTTAWA
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Key Design Issue
Potential Load transfer onto the buildings
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Solution – Tension Ties
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
Tension ties / No ties
Confirmation – FE Analysis
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
3 & 4 5
6
Sequencing
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
1a
1b
2a
2b
3a
3b 1
a 4 1b
2a
2b
3a
2b
LYON Station PARLIAMENT Station
Excavationstages
No Ties Ties
236’ 246’ 200’ 321’
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
LYON Station
Building assessment
Tunnelling Association of Canada (TAC) – Ontario Chapter Challenges and Innovations in Tunnelling
PARLIAMENT Station
Building assessment
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