Newbury Street Production Install

An 8″ helical pipe pile was originally specified to achieve the load and deal with lateral and corrosion concerns. This foundation solution proved too costly so Danbro suggested a Grouted Helical Micropile to obtain capacity and eliminate design issues.After a successful load test and test pile,122 Grouted HelicalĀ  Micropiles were installed to support the five story apartment building.

Project Summary:

  • Helical Pile Type: 3500.300 Wall Helical Piles with a 10″ Grout Displacement Plate
  • # of Helical Piles: 122
  • Location: Quincy, MA
  • Installation Depth: 45′ to 60′
  • Ultimate Pile Capacity: 80 kips
  • Equipment Used: Hitachi Excavator, 20K Drive Marian Torque Indicator
  • Challenge/Unique Aspect: A Grouted Helical Micropile generates significant capacity from skin friction on the rough, irregular grout column. Grout is a less expensive material and it helps to achieve higher capacity at a lower cost per kip. To further speed the installation and control cost, IDEAL, the helical manufacturer, welded the digger plate onto the extensions at the factory. This saved a lot of time during the installation giving the contractor a significant edge when bidding the project.