Determination of permeability of overconsolidated clay from pressuremeter pressure hold tests

作者：Liu Lang; Elwood David^*; Martin Derek; Chalaturnyk Rick

来源：Canadian Geotechnical Journal, 2018, 55(4): 514-527.

DOI：10.1139/cgj-2017-0279

• pressuremeter
• consolidation
• overconsolidated clay
• permeability
• in situ testing
• finite element analysis

A method was developed to interpret the horizontal permeability (k(h)) 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.

• 出版日期2018-4
• 单位Saskatoon; Saskatchewan