Portland-Milwaukie Light Rail Bridge Construction, June 2011 - TriMet

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Each towerfoundation iscreated from awork bridgeabove thecofferdam.Construction Begins July 1Crews build temporary work bridges from east and westEast: 460’ longWest: 335’ longA typical example of atemporary work bridge.East Work BridgeWest Work BridgeBarges located adjacent to future towers tofacilitate building cofferdams and work bridges In-water construction window8July 1-Oct. 31 annually
Cofferdam ExamplesCofferdam: “construction island” in the water9
Page 1 and 2: June 2011Building the Portland-Milw
Page 3 and 4: Cable-Stayed Bridge 1,720’ long L
Page 5 and 6: Four-Pier Cable-Stayed BridgeWest T
Page 10 and 11: Cofferdam for Building Base and Tow
Page 12 and 13: Cofferdam Construction Sequence•
Page 18 and 19: Oscillator will install 10’ diame
Page 20 and 21: Drilled Shaft Installation• Each
Page 22 and 23: Temporarysupport cablesPermanentcab
Page 24 and 25: Watch live, time-lapsed videoof the
Page 28: Terminology Tower 3 - west tower To

Portland-Milwaukie Light Rail Bridge Construction, June 2011 - TriMet

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