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BigDigSlides - Systems Analysis of The Big Dig April 26,...

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Unformatted text preview: Systems Analysis of The Big Dig April 26, 2011 CEE 3000-B Dr. Yiacoumi Group 5 Samuel Bihon Stephen Ennis Mindy Kao Applen Liu Natalie Nora Alan Shirley Overview • Purpose • Background Information • Functional Characteristics • Linkages of the System • Performance Measures • Cost/Benefit Analysis • Sustainability Analysis • Purpose • To reduce congestion on I-93 • To replace to deteriorating Central Artery • To bring more green space to Boston • To reconnect downtown Boston to the waterfront Background Information • Traffic Problems ▫ In 1959 I-93 carried 75,000 vehicles per day ▫ In the 1990s, I-93 carried over 200,000 vehicles per day ▫ In 1990 there was 10 hours of traffic congestion per day Image 1: Boston traffic on the old elevated highway http://www.bostoncondogroup.com/blog/2007/01/condo-living-on-bostons-new- greenway.html Functional Characteristics (1) • Problem: ▫ Central Artery (I-93) carried both north-south and east-west traffic ▫ Only route to Logan International Airport through Callahan and Sumner tunnels under Boston Harbor ▫ Traffic from west of Figure 1: Boston traffic before the Big Dig http://en.wikipedia.org/wiki/File:Boston-big-dig-oldtraffic.png Functional Characteristics (2) • Solution: ▫ 3 Highway Tunnels Ted Williams Tunnel Central Artery Fort Point Channel Tunnel ▫ 14-lane crossing of Charles River ▫ Direct route from West Boston to airport Figure 2: Boston traffic after the Big Dig http://en.wikipedia.org/wiki/File:Boston-big-dig-newtraffic.png Functional Characteristics (3) • New highway had to be built under the existing elevated highway ▫ Elevated highway had to continue to operate ▫ Temporary columns held weight ▫ Slurry walls made of concrete, clay, and Image 2: A slurry wall from the Big Dig https://netfiles.uiuc.edu/hashash/www/web/BigDig/Photos/Contract %20C11A1%20-%20OC%20Excavations/slurry%20wall_R07_10.jpg Functional Characteristics (4) • Utilities had to be relocated...
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This note was uploaded on 10/05/2011 for the course CEE 3000 taught by Professor Meyer during the Fall '07 term at Georgia Tech.

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BigDigSlides - Systems Analysis of The Big Dig April 26,...

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