Ottawa LRT Tunnel Construction Update
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OCT 4 –6, 2015 • Queens University • Kingston, ON Canada Challenges and Innovations in Tunnelling Ottawa LRT Tunnel Construction Update Tom Middlebrook, Humberto Ferrer DRAGADOS CANADA Oct 5th, 2015 Tunnelling Association of Canada Association Canadienne Des Tunnels Agenda Self Introduction Dragados Ottawa LRT Tunnel Station Construction Techniques Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling Tom Middlebrook Sr. Vice President, Business Development – Eastern Canada Dragados Canada Previously… MMM Group – Urban Mobility MRC – Transit Consultant Toronto Transit Commission – Chief Engineer Smaller Construction Companies Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling 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 Dragados ‐ Global Presence • Argentina • Colombia • Poland • United Kingdom • Australia • Ireland • Portugal • Venezuela • Canada • Greece • Spain • Chile • Peru • United States Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling Dragados in North America December 2005 In December 2005, Dragados USA began operating in the United States. January 2008 Dragados Canada opened its headquarters office in Toronto North American Companies Acquired Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling8 Services and Areas of Expertise Major Projects Alternative Project Delivery Design‐Build Public Private Partnership (P3) Water and Underground .Concrete structures . Bridges . Canals .Coastal Work . Highways and roads . Caverns .Dredging and Fill . Railroads . Dams .Marine Work . Mass transit . Hydroelectric Power Plant .Beach Regeneration . Underground . Water Tunnels .Floating Equipment . Airports . Water Supply .Ports .Docks Transportation Infrastructure Marine Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling CITY BELOW THE CITY Create new urban Increase the quality of spaces in life congested areas Sustainable growth Free surface for citizens Underground infrastructures Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling NEW INFRASTRUCTURE IS BUILD FOR THE USER’S BENEFIT HOWEVER DURING CONSTRUCTION THE NEIGBOURGHOOD IS DISTURBED AMONG THE MULTIPLE TECHNOLOGIES WE ARE OBLIGED TO LOOK FOR THE LESS DISRUPTIVE ONES Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling Traffic management Social cost Fuel consumption Longer journeys Higher carbon footprint Higher risk of accident Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling •Water •Gas •Sewage Utilities •Phone •TV relocation •Communications •Traffic control •Confidential org. •Unknown Request Project Permits schedule and Approvals cost Relocation by others (Lack of Final green light 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 TUNNEL Confederation Line Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling Sponsors Rideau Transit Group Equity Developers Project Co Design Build Joint Venture Maintenance Team 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 works 2.530 m running tunnel twin track 3 mined stations: Lyon, Parliament and Rideau Rideau Lyon Parliament 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 Lower Cost Higher risk of settlement SINGLE TUNNEL Flexibility in operation minimize by rock quality Multiple faces Higher cost and schedule TWIN TUNNEL Overlapping of Potential impact construction activities on building basement Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling EXCAVATION PROCEDURES Pros Cons Paleovalley Speed Possible damage to building basement TBM Open mode Coordination with stations One pass lining 1.5‐2 years TBM procurement Speed Urban restrictions Drill & Blast Economy Noise Multi face Vibrations Flexibility, Geometry Lower speed / face Mechanical Multiple faces Mobilize quickly 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 MECHANICAL EXCAVATION 30 m3/h 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 Intermediate shaft Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling EAST PORTAL Ottawa Ottawa University University Apartment complex East Portal University residential complex 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 Rock bolts and tie backs Adjacent buildings 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 Confirmation – FE Analysis Tension ties / No ties Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling Sequencing 3 & 4 5 6 Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling LYON Station PARLIAMENT Station 236’ 246’ 200’ 321’ 2 a 3 1 1 2 2 a a b Excavation b 2 a b 2 stages b 3 3 1 1 a b 4 a b No Ties Ties Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling Building assessment LYON Station Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling Building assessment PARLIAMENT Station Tunnelling Association of Canada (TAC) –Ontario Chapter Challenges and Innovations in Tunnelling.