Abstract:
Since 2004, Langan has worked with several developers on this city-block-size site in Manhattan. The site once housed a manufactured gas plant (MGP) facility, and Langan was involved with the environmental remediation at the site, which among other activities consisted of constructing a steel sheet pile containment wall and an in-situ stabilized soil-cement mix monolith. After the Client acquired this prime site in 2015, Langan was brought on board as the Geotechnical Engineer for the development of two high-rise residential and commercial towers. The 28- and 38-story towers are designed to be supported on high-capacity rock-socketed drilled piles. This presentation will discuss Langan's unique experience with the design and construction of these piles on this environmentally challenged site and with the replacement of existing pile foundations for a portion of the Elevated Highline Park structure that traverses across the site.Environmental aspects of the project, as they relate to the pile design and construction, will also be discussed.