PROJECT OVERVIEW
Phoenix Project #2001
For this project, 48 drilled micropiles (“DMPs”) were installed to support new foundations at the Remington Street bridge replacement in Suffield, CT. This project provided a unique challenge as Phoenix worked on both sides of an active brook that cut through the middle of the working zone. It was imperative that the flowing water was not disturbed at any time.
Before our work started, two verification tests in tension were performed on sacrificial piles, verifying an allowable bond stress value of 200 psi between the micropile grout and competent sandstone that was assumed during the design phase. This testing (followed by five additional proof tests performed over the course of production work) demonstrated that the piles had an Ultimate Pile Capacity of 390 kips.
Each pile was permanently cased through all overburden soils, and socketed uncased into the underlying natural bedrock formation. After each pile reached the specified tip elevation, pile reinforcement and neat cement grout was installed.
Phoenix installed all piles successfully and safely even with the challenge of a flowing waterway located within the limits of the construction site.
