Japanese Tunneler Digs In For Seattle Light Rail Project

McFall, Kathleen
March 2005
ENR: Engineering News-Record;3/28/2005, Vol. 254 Issue 12, p17
Trade Publication
The article informs that bite by bite, tunnelers will push through layers of glacial deposits to build a crucial section of Sound Transit 's $2.4-billion, 14-mile light rail system that will eventually connect downtown Seattle to the Seattle-Tacoma International Airport. The Beacon Hill segment consists of two parallel 4,300-ft-long, 18.8-ft-dia tunnels to be built with a 335-ton earth pressure balance tunnel-boring machine. Work has just begun on Beacon Hill, essential to the system's 2009 completion date. In the project area, bedrock is estimated at 3,000 ft deep beneath overlapping sands, gravels, silts, clays and tills varying from rock boulders to soft soils. Recent seismic data also suggest the presence of active faults. The tunnels will be bored along a roughly 5 percent grade. The primary mucking system will include a 24-in.-wide advancing conveyor with 12 muck cars.


Related Articles

  • Bering tunnel?  // International Construction;May2007, Vol. 46 Issue 4, p6 

    The article reports on the plan of Russia to build a tunnel linking its eastern tip to Alaska via a 105 kilometer tunnel under the Bering Strait. The U.S.$ 65 billion project will be used as a transport link and to supply oil, gas and electricity to the U.S. from Siberia. Building in three...

  • Bigger & deeper.  // International Construction;Jun2008, Vol. 47 Issue 5, p37 

    The article reports on the growth in the tunneling sector of the construction industry. The tunneling sector continues to see huge projects get underway, notwithstanding the skills shortage. Numerous new metros and metro extensions are being built in countries such as Spain, Russia, China and...

  • Finite Element Analysis of Tunnelling Induced Deformation Towards Pile Foundation. Mohammad Ismail, Mohd Ashraf; Lim Siao Phin; Tay Wui Wenn // Applied Mechanics & Materials;2015, Vol. 802, p28 

    The demand of surface area increases rapidly in the urban areas due to the increase in populations. This leads to the shortage of surface area for development in the future. Underground development is one of the solutions to solve the problems, such as the tunnel constructed underground, to...

  • Tunneling to the Falls.  // ENR: Engineering News-Record;7/17/2006, Vol. 257 Issue 3, p13 

    The article presents information on the Niagara Tunnel Project, which is an effort to increase water flow to Ontario Power Generation's 2,081-MW Sir Adam Beck Generating Complex. The project is scheduled to begin in September 2006. The work on the project will start once assembly of the job's...

  • MTA readies for East Side Access tunnel construction.  // Railway Age;Jul2007, Vol. 208 Issue 7, p16 

    This article states that New York MTA's 200-ton tunnel boring machine (TBM) is one step closer to starting its "earth-eating journey" in summer 2007. In June 2007, its first giant pieces were lowered into the mouth of the 63rd Street Tunnel in Queens, New York as part of the long-awaited East...

  • Germans, Chinese Build Israel's Long Tunnels. Sandler, Neal // ENR: Engineering News-Record;11/22/2010, Vol. 265 Issue 15, p19 

    The article reports on the scheduled opening of Israel's longest tunnel, the Carmel Tunnels, on November 30, 2010. The tunnel system is expected to enhance traffic flow in the port city of Haifa and is the first major construction project in Israel for China Civil Engineering Construction Corp....

  • Study on Risk Trend Assessment of Metro Tunnel crossing underground pipeline Based on Partial Connection Number. Hongtao Xie; Bo Li; Yunsheng Zhao // Applied Mechanics & Materials;2014, Issue 580-583, p1283 

    A model of risk trend assessment for metro tunnel crossing underground pipelines is proposed in this paper based on the partial connection number. This paper fully considered the certainty and uncertainty of the index and used "partial connection number method" to analyze the risk developing...

  • Analysis on Changes of Mechanical Properties of Lining of Tunnels in Huangtu Regions Taking Account of Loess Cavity by Using ADINA. Heping Zhou; Enyong Wang; Yuxia Hu; Zhiqiang Liu; Jianbo Cui // Applied Mechanics & Materials;2014, Issue 580-583, p1358 

    In this article, we focused on changes of mechanical properties in lining of tunnel caused by loess cavity. We established a corresponding model and carried out numerical analysis by using finite element analysis software ADINA, considered the effect of different locations, different size of the...

  • A model test and numerical investigation on the shear deformation patterns of deep wall�soil�tunnel interaction. Lee, Yong-Joo; Bassett, Richard H // Canadian Geotechnical Journal;Dec2006, Vol. 43 Issue 12, p1306 

    In congested urban areas, tunnel excavations have become necessary due to a lack of space. In many cases, such excavations are needed in areas adjacent to existing loaded piles. Therefore, a careful assessment of the wall�soil�tunnel interaction is required. These circumstances are...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics