68th Canadian Geotechnical Conference and 7th Canadian Permafrost Conference

AN IMPROVED SOLUTION FOR THE EXPANSION OF CYLINDRICAL CAVITIES IN MODIFIED CAM CLAY.

Session: Soil Mechanics I / Mécanique des sols I

Vincenzo Silvestri, École polytechnique de Montréal (Canada)
Youssef Bentaiebi, École polytechnique de Montréal (Canada)
Ghassan Abou- Samra, Université de Moncton (Canada)
Mireille Sandrine Ewane, École polytechnique de Montréal (Canada)
Christian Bravo-Jonard, École polytechnique de Montréal (Canada)

Recently the authors presented a semi-analytical solution for the undrained plane strain expansion of vertical cylindrical cavities in Modified Cam Clay, in which the hardening parameter , remained constant. This allowed the determination of explicit expressions for the principal effective stresses. In the present paper, the restriction imposed on is relaxed, as it varies during undrained shearing in Modified Cam Clay. The new semi-analytical solution is applied to a well-known benchmark case involving remoulded Boston Blue Clay. Comparisons are first made with the case of constant and then with both a finite difference solution and published finite element results.