Determination of permeability of overconsolidated clay from pressuremeter pressure hold tests

Author:

Liu Lang1,Elwood David2,Martin Derek1,Chalaturnyk Rick1

Affiliation:

1. Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.

2. College of Civil, Geological and Environmental Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada.

Abstract

A method was developed to interpret the horizontal permeability (kh) from pressuremeter pressure hold tests (PHTs) of approximately 3 min duration. The method relies on a regression analysis of the numerical analysis simulating the consolidation of clay under a constant pressure boundary during undrained expansion. The method was applied to a series of PHTs performed in deep clay formations in the Seattle area. The interpreted permeabilities are thought to be more representative of in situ conditions than those determined by laboratory testing by virtue of reduced disturbance during sample recovery and preparation. Results could be improved with a further exclusion of the creep effect on PHTs.

Publisher

Canadian Science Publishing

Subject

Civil and Structural Engineering,Geotechnical Engineering and Engineering Geology

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