The LRT Project

Tom Middlebrook, P.Eng Senior Vice President, Business Development – Canada Dragados Canada

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook Project Stakeholders

Sponsors

Equity Developers Project Co

Design Build Joint Venture Maintenance Team

Engineering Joint Venture

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 1

• Canada’s Capital City with population of 950,000 • Problem: saturated with buses (BRT) • Solution: replace BRT with Transit (LRT)

Yukon

Northwest Territories Nunavut

Newfoundland / Labrador British Columbia

Alberta Manitoba

Quebec Saskatchewan Prince Edward Island

New Brunswick Nova Scotia

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 2 Confederation Line

• 12.5 km LRT line with 13 stations • 10 km at grade in existing BRT Right-of-Way • 2.5 km tunnel between Ottawa University (uOttawa) and Pimisi • 3 underground stations: Lyon, Parliament and Rideau

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 3 Initial Design Approach

• Running tunnel: TBM tunnel (mono tube or twin-tube)

• Underground stations: cut- and-cover

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 4 Design Options Option Pros Cons Design Single • Lower cost • Higher risk of settlement minimized by Scheme Tunnel • Flexibility in operation rock quality • Multiple faces • Higher cost and longer schedule Twin Tunnel • Overlapping of • Potential impact on building basements construction activities Excavation • Speed • Paleovalley (soft soil) Procedures • Open mode • Possible damage to building basements TBM • One pass lining • Coordination required with stations • 1.5-2 years TBM procurement • Speed • Urban restrictions Drill & Blast • Economy • Noise • Multi face • Vibrations • Flexibility, Geometry • Lower speed Mechanical • Multiple faces • Mobilize quickly

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 5 Tunnel and Underground Stations Existing Utilities in Parliament Station

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 6 Construction Challenges

• Congested downtown core • Mixed ground conditions

Low rock • Significant potential for cover Utilities impacts on buildings

• Wide span ~ 18m

Rock bolts • Potential obstructions: rock and tie backs dowels & tie backs

• Complex utilities Adjacent buildings

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 7 Implications

• Cut-and-cover or top down excavation not feasible

• Twin-tube tunnel not feasible

• High risk for TBM operation Cut-and-cover social cost: business from complex and unknown interruptions utilities, and presence of tiebacks and bolts from existing structures

• Flexible and adaptable tunneling method required

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 8 Selected Construction Method

• Sequential Excavation Method (SEM) • Equipment used:

– Excavation: 3 roadheaders (SANDVIK MT-720)

– Mucking: LHD loaders Roadheader

Loaders

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 9 Work Planning

Three independent tunneling teams were deployed at separate access points

Ottawa University

Apartment complex

East Portal

University residential complex

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 10 Construction Challenges Lyon and Parliament Stations

• Challenge: Build 18m wide • Solution: Tension ties stations in between buildings 20m apart. • Design issue: Potential horizontal load transfer onto the adjacent buildings

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 11 Excavation Sequencing Lyon and Parliament Stations

&

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 12 Excavation Sequencing Lyon and Parliament Stations LYON Station PARLIAMENT Station

Without Ties With Ties

3a 2a 2a 2b 1a 1b 2b Excavation 2b Stages 1a 4 1b 3a 3b

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 13 Construction Challenges

Proximity to existing sewer tunnels and

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 14 Excavation Sequencing Rideau Station

In Soil

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 15 Excavation Sequencing Rideau Station

In Rock

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 16 Gallery

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 17 Running Tunnel

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 18 Excavation with Tension Ties

Lower side drifts Permanent side walls

With Ties 3a 2a 2b 2b Side drift 1a 4 1b Preliminary tension backfilling

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 19 Lyon Station

Cavern Excavation at Lyon Station

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 20 Parliament Station

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 21 Rideau Station

Rideau Station – Hard and Soft Ground

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 22 Rideau Station

Rideau Station Cavern Arch Concrete Work

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 23 Photo Credit: Giuseppe GaspariIn the 21st century, the construction of new infrastructure in urban areas should not negatively affect stakeholders

Innovation in Tunnelling is Key to reach this goal.

Ottawa’s Confederation Line LRT Tunnel proves that it can be done Confederation Line LRT Multi-Dimensional Underground Space Photo of the Year, Tunnel Association of Canada

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 24 TAC 2017 Canadian Infrastructure Project of the Year

https://youtu.be/P0h0qk36mqk

PARIS – 15 November 2017 The Confederation Line - Ottawa LRT Project | Tom Middlebrook 25