Bulkhead Tiebacks

Existing bulkheads were being ripped out and replaced in Avalon, New Jersey. In lieu of a dead-man system and in an effort to avoid driving timber piles in close proximity to residences, the engineer of record specified helical piles for tiebacks.

Project Summary:

  • Helical Pile Type: IDEAL 1.75″ Square Shaft
  • # of Helical Piles: 11
  • Location: Avalon, NJ
  • Installation Depth: 35′ to 40′
  • Ultimate Pile Capacity: 60 Kips
  • Equipment Used: Caterpillar 312 Long Reach Excavator, 17K Drive Head, Digital Torque Indicator
  • Challenge/Unique Aspect: The challenge this project presented was that the waler was installed on the vinyl sheets at the bottom of the tide-line on the bay. This required that the install be performed on the outgoing tide and at low tide, providing only a few hours to work.  Fortunately, the helicals could be installed quickly through the organic layer before reaching hard, deadpan sand.
  • Engineer/Architect: Mott MacDonald
  • General Contractor: Wickberg Marine