Tunnel Business Magazine

AUG 2018

TBM: Tunnel Business Magazine is the market leader for North America. TBM is written for leading professionals in all aspects of tunneling and covers project stories, design elements, contracting strategies, legal issues, new technology and more.

Issue link: http://digital.tunnelingonline.com/i/1014911

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Page 33 of 43

TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // AUGUST 2018 T he c ard Crossing, characterized by com- plex soil geometry, a high water table and an active, triple-level transit corridor above the tunnel alignment, is recognized as the most technically challenging aspe A's East Side Access project. The Crossing, approxi- mately 12-m (40-ft) high by 18-m (60-ft) wide, 38-m (125-ft) long and 26 m (85 ft) below ground level, was constructed using the sequential excavation metho The pre-existing transit corridor consisted of an active five-tr bway box just a few feet above the tunnel cr ard itself, and east/west- bound elevate acks, all heavily traveled. Public safety during the work was critical, and protecting these structures from movement during the performance of the work was considered paramount. However, site restrictions that included groundwater drawdown limitations and a moratorium on vertical drilling fr ard or from the overlying sub- way tunnel severely limited available options. A canopy of frozen ground installed above the tunnel alignment to provide the required ground water control, as well as a structural arch for the sequential tunneling operation, was considered the only techni- cally viable option. This option was suggested by the project designer and adopted by the design-build contractor. The project was the first sequentially excavated, soft-gr City. The size of the excavated tunnel completed beneath a frozen arch is unprece- dented. There were many complicating elements that had to be overcome in creating Project of the Year Award: northern boulevard crossing, Schiavone/Kiewit, AJV, WSP/Parsons Brincker hoff F E A T U R E S T O RY 3 4 Outstanding Individual Award: David R. Klug David R. Klug is the president of David R. Klug and Associates Inc. and Klug Con- struction Systems LLC based near Pittsburgh. The companies provide international and national manufacturer repre- sentative services to the under- ground heavy civil and mine con- struction industries. They also specialize in the mar- keting coordination and distribu- tion of products and specialty ser- vices for precast segmental tunnel lining, soft-ground and conventional tunnel construction practices inclusive of initial support systems, final lining reinforcement products and components for one- pass precast tunnel linings. Klug has more than 40 years of industry involvement in many of the major tunnel programs con- structed in the United States and Canada. In conjunction with his European clients, he conducts in- dustry outreach seminars to Eu- rope for people from the U.S. and Canadian tunneling industry to study European methods of tun- nel construction and contract de- livery practices. To date, Klug has conducted 12 European tunnel seminars. Klug received a bachelor of sci- ence degree from West Liberty State College. He is a past chair of the UCA (2009-2011), a member of the UCA Fox Conference Commit- te and the Associated General Contractors of America af- filiate of Western Pennsylvania. The Outstanding Individual Award recognizes those individu- als, including contractors, engi- neers, owners and suppliers, who have made significant contribu- tions to the field of tunneling and underground construction and to the Underground Construction As- sociation (UCA).

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