Construction Technologys Big Dig Trip

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Construction TechnologysBig Dig Trip

• Boston, MA
• March 4-8, 2000

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Introduction

• Second year Construction Technology students
  were given an opportunity to travel to Boston, MA
  to view The Big Dig. Bostons Central Artery /
  Tunnel project (a.k.a. Big Dig) is the largest
  single Civil project undertaken in American
  history.

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Application

• Those who participated were able to see how
  topics covered in classes such as Computer Aided
  Drafting Design, Surveying, Engineering
  Materials, Steel, Timber Concrete Design,
  Construction Estimating, Environmental Planning,
  and Project Management are utilized to solve real
  world construction problems.

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Goals Objectives

• View application of subjects taught in various
  construction technology classes at SCC.
• View a construction project that is grand in
  scope an that is utilizing many construction
  techniques for the 1st time in US history.
• Expand cultural experiences and view various
  historical and geographical sites along the way.

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Goals Objectives

• The CA/T project is on a scale comparable to many
  great projects of the last century
• The Panama Canal confronted earthslides, malaria,
  yellow fever, and jungles.
• The Chunnel was dug from either end, 31 miles
  apart, meeting at a precise point under the
  channel floor.
• The Alaska Pipeline contended with vast
  distances, freezing temperatures, and major
  environmental concerns.

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Goals Objectives

• The CA/T's unique challenge resides in the fact
  that it is being built in the middle of a city.
  The CA/T is designed to keep the city open for
  business throughout construction. The process
  of keeping the city open and making certain that
  all affected groups are treated fairly is called
  mitigation, and it takes up 1/3 of the project's
  budget.

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And Away We Go!!!March 4, 2000

• Construction technology students are ready for
  an exciting trip!

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1st Stop - Washington, D.C.March 4, 2000

• For many students, this is their first subway
  experience.

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Washington, D.C.

• Can we eat now?

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Washington, D.C. Taking in the sights!!!

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Washington, D.C. Taking in the sights!!!
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The Smithsonian
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New York, Here We Come!

• After getting a good nights rest, we left
  Alexandria, VA for New York.

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New York, NY March 5, 2000
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New York
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The Trip Continues

• After visiting New York City for the day, we
  moved on to Milford, CT to rest for the night.
• The next morning we traveled to Framingham, MA to
  our motel, then we finally arrived in Boston for
  the day!!!

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Boston, MA March 6, 2000

• Planes, Trains Automobiles!!!

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BostonThe Freedom Trail
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Granary Burying Grounds Paul Revere
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On Board the U.S.S. Constitution
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TheBig Dig March 7, 2000

• The Big Dig welcomed SCC students with a
  presentation covering the overall project scope.

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Why The Big Dig?

• Bostons Central Artery is a 6 Lane elevated
  highway that runs through downtown Boston. When
  opened 1959 it carried about 75,000 vehicles a
  day. Today it carries upwards of 190,000, making
  it one of the most congested highways in the U.S.

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More Problems

• Traffic crawls for 10 hours per day.
• The accident rate on the existing Central Artery
  is 4 times the national average for urban
  Interstates.
• The annual cost to motorists from this congestion
  in terms of an elevated accident rate, wasted
  fuel from idling in stalled traffic, and late
  delivery charges is estimated to be 500
  million.

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The End Result

• A 12 reduction in citywide carbon monoxide
  levels.
• The creation of more than 150 acres of open land
  and new public parks in and around the city of
  Boston.
• Clay and soil from the project are being used to
  fill and cap landfills throughout the Boston area.

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TheBig Dig Tour

• Students were amazed at the size and complexity
  of the project. Tracy looks out at the Tunnel
  Jacking operations.

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Fort Point Channel

• The Big Dig is extending I-90 (the Mass.
  Turnpike) under Fort Point Channel into South
  Boston, where it will meet up with the Ted
  Williams Tunnel and extend to Logan Airport (the
  last major airport connection remaining in the
  interstate highway system).

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Simply Amazing!

• Before reaching the channel, I-90 must pass
  under 9 active railroad tracks carrying commuter
  and Amtrak trains into South Station, Boston's
  busiest rail terminal. This is accomplished by
  jacking tunnel boxes under the tracks through
  frozen soil.

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TheBig Dig

• Our ground tour started with a look at a tunnel
  built using a non-traditional slurry wall
  construction technique. The Big Dig includes
  the largest use of slurry walls anywhere in North
  America.

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Slurry-Wall Tunnel
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The Ted Williams Tunnel

• The next stop on our tour was the Ted Williams
  tunnel. The tunnel is made up of 12 binocular
  shaped tubes.

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Tunnel Tubes
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Dredge

• The worlds largest dredging machine dug a 3/4
  mile-long trench in the harbor between the South
  Boston Waterfront and Logan Airport.

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Placing the Tubes
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The Charles River Bridge

• The underground Central Artery will surface by
  the Fleet Center and cross the new Charles River
  Bridge.
• The Charles River Bridge will be a 10 lane,
  asymmetrical cable-stayed bridge.
• It will be the first asymmetrical cable-stayed
  bridge in the US, and the widest in the world.

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The Charles River Bridge
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The Charles River Bridge
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On to Gettysburg

• After the Big Dig tour, we departed for
  Harrisburg, PA.
• After a nights rest, we hit our last destination,
  Gettysburg, PA.

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Gettysburg March 8, 2000
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Back to SCC!!!

• After touring Gettysburg, we departed for
  home!!! We arrived at SCC late at night, tired
  but happy.

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Thank You!

• Thanks to money provided by the Faculty
  Assembly, our construction technology students
  were given an opportunity to tour cities and
  sites that expanded both their engineering
  background and their cultural background.
• Thank you!