Development of Strain Based Vibration Controls to Lower Costs of Constructing Transportation Facilities in Dense Urban Locations

The objective of this research is to begin development of strain and displacement based methods, guidelines and criteria for the evaluation and protection of structures subjected to close-in blasting for development of urban transit facilities. In 2012 New York City agencies are fragmenting by blasting large volumes of rock to construct transit facilities in close proximity to existing facilities. Transit projects with a total cost exceeding 17 Billion dollars are currently underway in Manhattan. Since all of these projects involve tunnels, shafts and escalator inclines in rock, rock excavation costs are a significant cost factor. This work relates to protection of existing structures from external loads and improving construction efficiency and safety. Primary hazards associated with blasting adjacent, contiguous and within structures include permanent rock mass displacement owing to delayed gas pressures ground strains from wave propagation as well as vibratory response. Existing methodology is often applied quite conservatively in the form of permissible ground particle velocity which leads to confusing specifications and increased construction costs.

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  • Supplemental Notes:
    • This document is disseminated under the sponsorship of the Department of Transportation University Transportation Centers Program.
  • Corporate Authors:

    Infrastructure Technology Institute (ITI)

    Northwestern University
    L260 Technological Institute, 2145 Sheridan Road
    Evanston, IL  United States  60208-3109

    Research and Innovative Technology Administration

    University Transportation Centers Program
    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Dowding, Charles H
    • Abeel, P
  • Publication Date: 2013


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Tables;
  • Pagination: 24p

Subject/Index Terms

Filing Info

  • Accession Number: 01493480
  • Record Type: Publication
  • Report/Paper Numbers: NU-ITI Project 60029795
  • Created Date: Sep 4 2013 4:45PM