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ENGINEERING CHARACTERISTIC OF GLACIAL TILLS IN GTA

Session: Rock Mechanics and Engineering Geology III / Mécanique des roches et génie géologique III

Laifa Cao, Principal Engineer (Canada)
Scott Peaker, Principal Engineer (Canada)
Shaheen Ahmad, Senior Consultant (Canada)

This paper presents geotechnical investigation results conducted in the glacial till deposits in relation with a light rail transit project in Toronto, Ontario. The ranges of soil parameters including unit weight, water content, strength, modulus, consolidation parameters and shear wave velocity are provided. Statistical analyses of soil parameters are conducted, where available. Possible correlations between SPT N value and pressuremeter modulus and soil friction angle are discussed. In additional, the distribution of boulders and cobbles in the glacial till deposits is also discussed through the observation of a shaft excavation for a tunnel project in Markham, Ontario.