Berth Deepening by Rock Blasting at the Howland Hook Marine Terminal, Staten Island, NY
Instrumentation of a marine terminal during close-in underwater blasting included in-rock and wharf-mounted geophones and water pressure sensors adjacent to piles. Limits placed on vibrations and pile cap shear strains were 25 in/s (635 mm/s) and 467 µ-strains (safety factor of 4). Pile cap and wharf deck strains were calculated from time-correlated displacement measurements during 42 blasts up to 9 ft (2.7 m) from the wharf. The highest ground velocity and acceleration adjacent to piles were 46 in/s (1,068 mm/s) and 95 g’s while the highest pile cap strain was 435 µ-strains. Peak frequencies averaged 200 Hz (0.005 s period). Peak concrete deck bending and tensile strains were 15.5 and 9.7 µ-strains, respectively. The wharf sustained no damage at these strains. Structure response spectra were computed for the largest expected earthquake and compared with a typical blast demonstrating that structure displacements and strains at the wharf natural period are lower for blasting.
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Availability:
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Supplemental Notes:
- © 2016 American Society of Civil Engineers.
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Aimone-Martin, Catherine T
- Meins, Brent M
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Conference:
- 14th Triennial International Conference
- Location: New Orleans Louisiana, United States
- Date: 2016-6-12 to 2016-6-15
- Publication Date: 2016
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 233-242
- Monograph Title: Ports 2016: Port Engineering
Subject/Index Terms
- TRT Terms: Berthing facilities; Dislocation (Geology); Geophones; Marine terminals; Pile caps; Rock excavation; Seismicity; Shear strain; Tension; Vibration; Wharf components
- Geographic Terms: Staten Island (New York, New York)
- Subject Areas: Construction; Geotechnology; Marine Transportation; Terminals and Facilities;
Filing Info
- Accession Number: 01605596
- Record Type: Publication
- ISBN: 9780784479902
- Files: TRIS, ASCE
- Created Date: Jul 27 2016 9:52AM