New approach of laboratory determination of coefficient of Earth Pressure at Rest (K0) and its practical application

Michael Braverman, Keisuke Adachi, Caren Ackley, Bruce Polan

Dans les comptes rendus d’articles de la conférence: GeoCalgary 2022: 75th Canadian Geotechnical Conference

Session: W10

ABSTRACT: The coefficient of earth pressure at rest, K0, is an important parameter for geotechnical calculations. The accurate determination of K0 is critical for predicting the movement of soils under and around construction projects, such as retaining walls, tunnels, and deep excavations. Proper utilization of K0 in construction design and execution increases ground and structure stability. Various instrumentations for both in-situ and lab K0 determination have been developed in recent years. Many tests developed for in-situ K0 measurement are accompanied by serious soil disturbances, while lab testing requires equipment that is often cumbersome, which creates difficulties in the measurement and control of all test parameters. A simplified method for lab K0 determination was developed in the GHD Waterloo High Complexity Geotechnical Laboratory. The main aspects of this new method and some practical applications are described in this paper.

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