Settlement studies on the National Museum Building, Ottawa, Canada/ Etudes sur le tassement du Musee National du Canada a Ottawa

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Pages338345; # of pages: 8
Subjectsettlement; marine clay; properties of soils; soil mechanics; loads; sensitive clay
AbstractThe building for the National Museum of Canada is a four- storey structure about 400 feet long and 150 feet wide with heavy exterior walls of sandstone resting on spread footings. Since completion of the building in 1910, footing loads which vary from about 1 1/2 to 4 tons per square foot have caused a differential settlement of more than 1 1/2 feet. Borings show that the building is underlain by about 50 feet of sensitive, compressible marine clay. Below this is a variety of silty clays, clayey silts, and sands. Glacial till occurs at a depth of about 120 feet and bedrock at 132 feet. Regular engineering tests were performed on undisturbed samples obtained outside the influence of the building in order to determine grain size, strength, consolidation and plasticity characteristics of the soil. An attempt is made to determine the cause of settlements and to compute settlements using soil mechanics theories. These movements are compared with actual settlements. Theoretical bearing capacity is compared with estimated actual bearing capacity. Comments are made on the existing foundation design and a design which would have been chosen for this building on the basis of modern practice.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number3071
NPARC number20375743
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Record identifiered36be6f-7753-4c53-9f8e-e41d8b2ba266
Record created2012-07-23
Record modified2016-05-09
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