Tunnel Business Magazine

JUN 2018

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TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // JUNE 2018 4 8 T U N N E L U P D A T E S gle side drift. Construction of mid-tunnel main- tenance shaft and adit started mid April 2018. Crews are utilizing two Liebherr 950 to ex- cava praymec 8100 shotcrete robot to place the shotcrete lining. obs Associates are the Resident Engineer; unnel Designer; GZ Con- unnel Engineer. Key Project Personnel: Sound Transit: Chad Fre - er; Atkinson: Archie Kollmorgen, Proje - ager, Jake Coibion, Tunnel - len Jacobs Associates: Ted DePooter, Resident Engineer un Wei Leong, Office Engineer. CANADA ONTARIO Ottawa Combined Sewage Storage Tunnel (CSST) Dragados-Tomlinson Joint Venture The $146 million CSST project for the City of Ottawa includes the construction of two inter-connected tunnels: an east-west tun- nel (EWT) through the downtown core from LeBreton Fla dinburgh Park, and a north-sou ent Street from Chamberlain Avenue to the Ottawa Riv- er, just behind the Supreme Court of Canada. The tunnels will be a total length of 6.2 km, with an inside diameter of 3 m, and will be 10- 31 m below ground level. The CSST project also includes the construction of 15 major access shafts, as well as support buildings such as odor control facilities. A double-shield tunnel boring machine eing used to construct the tunnel. The fully assemble is approximately 250 m long. Tunneling also makes use of a locomo- tive and tracks for the transport of muck cars, precast concrete liner segments and personnel. A gantry crane is used at surface to support tunneling operations, including removing and dumping muck cars and lowering liner seg- ments for tunnel assembly. The full length of the CSST tunnels are anticipated to be excavated in bedrock. The bedrock formations that are anticipated to be encountered by the CSST tunnels and shaft excavations include the Veralum, Lindsay and Billings formations, which generally consist of limestone and shale. Currently, construction is taking place at five of the 11 surface locations across the city and tunneling of the is underway. These include, shaft construction, starter and tail tunnel excavation, existing infrastructure con- nections, tunneling support operations, outfall chamber construction, and portal excavation for receiv This summer, the tunnel boring machine will complete mining of the north-south tunnel. At which point, it will emerge from a portal in the cliff, behind the Supreme Court of Canada. In constructing the CSST, Ottawa will achieve, by 2020, a level of performance that meets and potentially exceeds current com- bined sewer overflow (CSO) regulations and guidelines – putting the City of Ottawa at the forefront of Canada's leaders in meeting indus- try regulations and guidelines for CSO controls. Stantec and Jac e the adminis- trators of the construction contract to ensure the CSST Project is built in accordance with the City's design with geotechnical support from Golder. Stantec completed the Environmental Assessment and functional design. Stantec and Jac ompleted the preliminary and detailed design and are now both providing contract administration and inspection servic- es through the construction phase. Key Project Personnel: Owner (City of Ot- ta oje - ager - Steve Courtland; Contract Administrator: Proje c); Contract Administrator: Sanjay Verma (Jacobs- eviously Clare Humphrey (Jacobs- act Administrator: Co- lin Goodwin (Stantec); Construction Director: Gerald Bauer (Stantec); Jac oject ascal Pitre (Jac ac- tor (Dragados-Tomlinson Joint Venture): Proje ernando Triana (Draga- dos); Civ - driks (Tomlinson); Project Engineer - Surface Works: Richard Poulin (Tomlinson). Ottawa O-Train Confederation Line Light Rail Transit Project Rideau Transit Group To build the O-Train Confederation Line, the City of Ottawa assembled a strong public- private partnership that includes financial commitments from the provincial and fed- eral governments, and a proven private-sec- tor project team, the Rideau Transit Group. A world-class consortium of Canadian and international companies, the Rideau Transit Group was selected in a highly competitive process based on the strength of the group's design, construction and financial proposal, and its track record of delivering major trans- portation projects on time and on budget. Working closely with the City of Ottawa, the Rideau Transit Group designed and began building the $2.1 billion Confederation Line in 2013 and will maintain the line until 2038. Revenue Service begins when the build is completed in 2018. An integral part of the Rideau Transit Group (RTG) proposal for the Confederation Line was the approach to the construction of the tun- nel under Ottawa's downtown core. The tun- nel spans 2.5 km, is on average 15 m below the surface and features three of the stations in the Confederation Line project — Lyon, Parliament and Rideau. Following the bid process in 2012, the City's experts from around the world worked to de- termine the tunneling method and equipment required for the Confederation Line tunnel. Proximity to the Rideau C World Heritage Site, the specific soil condi- tions of the downtown core, and the properties of the geotechnical materials to be excavated were all evaluated. It was also important that the tunneling method minimize disruptions for the general public and daily life in the city. Sequential Excava was use ovides a high degree of flexibility to adjust the excavation ap- proach and support measures for soil and rock conditions encountered; it also reduces risks of tunneling construction. This method also mini- mizes longer term disruptions at surface. Civil works completed in Q1 2018 include: Parliament Station steel erection for mid- entrance structure substantially complete; west / mid-entrance site backfill substantially complete; rock excavation for West Tunnel Vent Shaft (TVS) completed; Rideau Station West Entrance structural lining, excavation and breakthrough of west TVS, mid-entrance elevator adit structural lining, station platform and track slab concrete pours, and installation of west bound track work all completed; Rail installation for the trackwork in the west- bound direction is complete from Tunney's Pasture to Blair; In the tunnel, 80% of track slab is complete with rail installed for 50% of the length in the eastbound direction, west- bound track complete. Q2 underground work will include: Lyon Station final finishes, mechanical and electri- cal, systems and ventilation, and elevators and escalator work; Parliament Station east & west Tunnel Vent Shafts (TVS) and installation of mid-entrance elevators will be underway, and work on mechanical and electrical, fire protec- tion and HVAC, elevators and escalator work will continue; Rideau Station work will include staircase concrete pours and escalator installa- tion at west entrance, concrete structural lin- ing of west TVS shaft, mid-entrance elevator installation, completion of east entrance struc- tural lining, elevator and escalator installation between concourse and platform levels, and station service rooms construction and equip- ment installation. Rideau Transit Group equity partners are: ACS Infrastructure C -Lavalin and EllisDon. DBJV is made up of: Dragados C -Lavalin. Some of the other firms that have worked on the project include: Thurber Engineering Ltd. (geotechnical); Dr. Sauer & Partners Corpo- ration (tunnel design); Adamson & Associates Architects (station design); Alstom – vehicle; Thales – systems; bbb Architects (station de- sign); Fast + Epp; Ha Gr oup; Sereca Fire Consulting Ltd.; and Scotia Capital. Key Project Personnel – City of Ottawa/ O-Train Construction Offic oni, Gener , Transportation Services; Steve Cripps, Director, O-Train Construc- tion; Gary Craig, , Light Rail Design and Construction. Rideau Transit Group/ OLRTC: Antonio Estrada, CEO, Rideau Tran- sit Group; Peter Lauch, Technical Director, Rideau Transit Group; Eugene Creamer, OLRTC Project Director; Humberto Ferrer, OLRTC Deputy Project Director.

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