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Cover Story - New Tech for Old Tasks - Tunnel Surveyors Use the Latest Technology on New York's No. 7 Line Extension
To a tunnel surveyor, the section of the Metropolitan Transportation Authority's $2.1 billion No. 7 Line Extension project that stretches under several blocks on Manhattan's far West Side didn’t present any unexpected challenges … but that’s only because loose ground requiring freezing, working around an underground orchestra of heavy equipment, strict construction tolerances and aggressive construction schedules fall well within "expected conditions."
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City of Austin Announces Mandatory Pre-bid Meeting for Waller Creek Tunnel Project
The City of Austin (Texas) invites tunneling companies to attend a vendor conference for a flood control tunnel on Wednesday, Sept. 22, 2010, at the Emma S. Barrientos Mexican American Cultural Center (Rehearsal Lab), 600 River Street, Austin, Texas 78701 at 10:30 a.m.
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Allentown Celebrates 100 Years
Allentown Shotcrete Technology, Inc., a leading manufacturer of wet- and dry-process shotcrete equipment, is celebrating its 100th anniversary in the sprayed concrete industry.
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Retractable Robbins TBM Selected for ARC Palisades Tunnels
After 100 years, a new rail route will once again be burrowed below the Hudson River.
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Better Specifications for Underground Projects Workshop
Current underground industry specifications vary widely as their development is impacted on a project specific basis by the legal requirements and risk transfer by the owner, third-party stakeholders, engineering design approach, contractor practices and the complexity of the project.
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Ground Stabilization for Urban Tunneling
In dense, urban areas, the need for soil stabilization often goes hand-in-hand with soft ground tunneling operations and related shaft construction. Hard rock tunneling can also be problematic in areas of the tunnel alignment where cover is insufficient or the rock itself is potentially unstable.
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UCA of SME Project of the Year
Hailed as a “Model for America” by U.S. Transportation Secretary Ray LaHood, the successfully delivered Metro Gold Line Eastside Extension (MGLEE) celebrated its grand opening Nov. 14, 2009. The line extends the Los Angeles County Metropolitan Transportation Authority’s (Metro) light rail system to the densely populated and continuously growing East Los Angeles communities.
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Planning for a Tunnel Project
In any water or wastewater system, tunnels provide a critical link between the treatment facility and the distribution/collection system that reaches the end-user. However, despite their importance, many system owners are unfamiliar with how to oversee a tunnel construction project since the need to build a tunnel is often infrequent.
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Question and Answer with Brookville Equipment Corp.
No matter the end use, the diameter or geology, tunnel construction depends on one very basic need: getting materials in and out of the hole. One of the most common pieces of equipment around the jobsite is the locomotive, but they are not all the same. Depending on the project, key characteristics should be carefully considered to make sure your locomotive does the job efficiently.
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My Turn: by: Tony Lynn
Looking Beneath the Surface for Tomorrow's Transportation Solutions
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Business Briefs:
Tunneling Complete for Robbins TBM at East Side Access; New Irvington Tunnel Awarded to Southland/Tutor Perini JV;
Kenny/Obayashi Low Bidder for Columbus OARS Project;
Ameron Recognized for Arrowhead Project;
Testing of the Concrete and Tunnel Liner for Design Verification;
New Book on Underground Grouting Available;
Construction Begins for Port of Miami Tunnel;
2010 NAT Conference
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Global:
Robbins EPB Attains City-Wide Record in Chengdu;
Record-Breaking Herrenknecht TBM to Extend Highway Network in Italy;
NFM Breakthrough in Barcelona Metro ;
Balfour Beatty Turns to Atlas Copco for Devils Punchbowl Tunnels;
New Morgan Sindall Becomes One of UK's Largest Forces in Construction and Infrastructure
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