Deep ground improvements have begun on Cambridge Turnpike Improvement Project, which are required because sections of the roadway were built across marshy wetlands with subsurface conditions of deep layers of loose fibrous peat and low strength silts. Since its original construction, the roadway has been settling and experiencing chronic flooding, requiring road closure. To mitigate the flooding, the roadway will be raised up to 3’. To support the existing road and this added fill in this area, 833 GeoConcrete Column rigid inclusions will be drilled up to a depth of 70’. To distribute the load between the concrete columns and roadway pavement, the contractor augers down the concrete columns 4’ and rebuilds the tops with compacted stone as a Rammed Aggregate.
CMA Engineers has assisted the Town of Concord, MA with the design and construction administration for the reconstruction of the Cambridge Turnpike.
