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A platform for research: civil engineering, architecture and urbanism
Second Avenue Subway Project, New York — Reconstructing Existing Buildings for New Station Entrances
The Second Avenue Subway will be the first major expansion of New York's subway system in over 50 years. As shown in Figure 1 below, it will start from 125th Street in Harlem and will connect directly to the Financial District near Wall Street. Phase 1 is already under construction and consists of twin bored tunnels, three new stations at 96th Street, 86th Street and 72nd Street, and major modifications to an existing station at 63rd Street. The new station structures will be located directly under the roadway of Second Avenue and are either cut and cover construction or mined rock blasting depending on ground conditions. The entrances will be formed within adjacent existing high rise buildings. This paper will focus on the issues associated with the design of three of these new entrances. For the purposes of this paper these are referred to as Entrance A, B and C. These entrances will incorporate new large open spaces at street level and below for lobbies and banks of escalators and elevators. This will require the removal of existing high load columns, shear walls and diaphragm slab areas. New load transfer structures, underpinning and strengthening will be required to ensure structural integrity is maintained.
Second Avenue Subway Project, New York — Reconstructing Existing Buildings for New Station Entrances
The Second Avenue Subway will be the first major expansion of New York's subway system in over 50 years. As shown in Figure 1 below, it will start from 125th Street in Harlem and will connect directly to the Financial District near Wall Street. Phase 1 is already under construction and consists of twin bored tunnels, three new stations at 96th Street, 86th Street and 72nd Street, and major modifications to an existing station at 63rd Street. The new station structures will be located directly under the roadway of Second Avenue and are either cut and cover construction or mined rock blasting depending on ground conditions. The entrances will be formed within adjacent existing high rise buildings. This paper will focus on the issues associated with the design of three of these new entrances. For the purposes of this paper these are referred to as Entrance A, B and C. These entrances will incorporate new large open spaces at street level and below for lobbies and banks of escalators and elevators. This will require the removal of existing high load columns, shear walls and diaphragm slab areas. New load transfer structures, underpinning and strengthening will be required to ensure structural integrity is maintained.
Second Avenue Subway Project, New York — Reconstructing Existing Buildings for New Station Entrances
Giffen, Richard (author) / Ezzeldin, Karim (author) / Towell, Neil (author)
Structures Congress 2009 ; 2009 ; Austin, Texas, United States
Structures Congress 2009 ; 1-8
2009-04-29
Conference paper
Electronic Resource
English
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