Three buildings on floating foundations in Ottawa, Canada

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Journal titleJournal of the National Buildings Organization
Pages106119; # of pages: 14
Subjectfloating foundations; sensitive clay; settlement; bearing capacity; marine clay; Basements and foundations; fondation flottante; argile sensible; tassement; portance du sol; argile marine
AbstractOttawa is situated in a region of sensitive marine clay which varies in depth from a few feet to more than one hundred feet. Due to the structure of the clay, it retains a high water content in its natural state and is therefore very compressible. Buildings with strip footings have been known to settle more than one foot. Until recently, the common foundation consisted of strip footings for small structures, and piles driven to bedrock for the larger buildings. This paper describes the performance of another type of foundation for large buildings; the mat foundation in which the building is founded on a reinforced concrete monolithic slab, placed at such a depth that the net foundation pressures are very small. Settlement observations on several apartment buildings in Ottawa with mat foundations have been carried out during the last ten years. The results are quoted and the performance of this type of foundation is discussed.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number6516
NPARC number20358484
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Record identifierf9bd4ea4-9de2-41b1-8319-b5914e40ea0c
Record created2012-07-20
Record modified2016-05-09
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