The New York City Department of Design and Construction (NYCDDC) specified the use of Grouted Helical Micropiles to support the ductile iron and ESVP gravity sewers in the narrow streets of the Warnerville and Meadowmere. These communities are located in the Rosedale section of the Borough of Queens, City of New York. They were specified due to the limited street widths and utility restrictions on Broad Street and Bayview Avenue in Warnerville and in Meadowmere on 1st, 2nd, 3rd Streets and Meyer Avenue. Maintaining daily access for the residents, businesses, and emergency services on either side of the narrow (15′ to 20′) streets was mandatory.
- Helical Pile Type: 1.75″ Square Shaft with a 6″ uncased grout column
- # of Helical Piles: 603
- Pile Capacity: 80 Kips
- Location: Multiple – Queens, NY
- Application: New Construction
- Project Date: 2007
- Installation Depth: 35′ – 50′
- Equipment Used: (2) Caterpillar 315 and (2) 12K Driveheads
- Challenge/Unique Aspect: Helicals were the premier choice to eliminate vibration concerns since driven piles would have damaged the road and could have damaged the buildings nearby. Working in accordance with traffic and DOT regulations made the construction go smoothly. The use of helical piles facilitated speedy mobilizations and demobilizations and eased traffic flow issues.
- General Contractor/Installers: E.E. Cruz Inc. & RCC Pile & Foundation Inc.
- Engineer: LiRo Group
- Owner: NYC Department of Design and Construction (NYCDDC)