Twenty-two 2″ Square Shaft grouted helical micropiles with a 10″12″14″ helical configuration encased in 6″ steel casing and grout that surrounded the pile with an 80 KIP minimum capacity. Depth of pile ranging from a minimum of 30 feet to a maximum of 50 feet per the engineers specifications per pile. Heavy duty underpinning bracket and T pipe were used for the support application once the 2″ Square Shaft piles were in a suitable load bearing strata. The average torque reached on this job was 13,000 foot pounds of torque [130 KIPS]. Due to the presence of an unknown layer of iron sand, pre-drilling was required to be able to get the steel cased pile to the required depths.
Project Summary:
- Helical Pile Type: 2” Square Shaft with 6″ steel cased grout column
- # of Helical Piles: 20
- Location: Holmdel, NJ 07733
- Installation Depth: 30′ – 50′
- Equipment Used: Excavator, skidsteer, 20k drivehead, Marian Torque Indicator
- Challenge/Unique Aspect: Pre-drilling was required due to unknown layer of iron sand
- Engineer/Architect: Morris Flood Associates
- General Contractor: Almasi Contractors
