Project Details:

Solution:

The project was done in two phases: Westbound I-690 was completed in the fall of 2017; eastbound I-690 in the summer of 2018. Phase 1 included the installation of approximately 2,000 CMCs on the north side of the MSE embankment wall. The viaduct was left in place during this phase. Phase 2 included the installation of approximately 1,500 CMCs which supported the south side of the MSE wall embankment. The walls, constructed along 1,500 LF of highway, ranged in height from 12-21 ft. Maximum design bearing pressures reached 7 ksf. The CMCs terminated at an average depth of 34 ft and a maximum depth of 40 ft.

This ground improvement solution reduced post-construction settlement to acceptable levels and improved the bearing capacity of the MSE retaining wall -- designed by The Reinforced Earth Company, a sister company of Menard and member of the Soletanche Freyssinet Group. This was the first design-build CMC rigid inclusion project performed for the NYSDOT. The project, though, was not without its challenges, including a strict for completion and working alongside an existing viaduct. By utilizing a crew that had significant experience working on highway projects, Menard overcame any schedule concerns. Careful coordination with Menard’s design team averted potential issues associated with working near the viaduct.

For a major highway project, Menard successfully supported a double-sided MSE wall, meeting the NYSDOT’s requirements for quality, safety and schedule.

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