Compressibility and seepage properties of peats
Item Type:Invited Talk
Citation:O'Kelly B.C., Compressibility and seepage properties of peats, Invited presentation at the 15th Irish Environmental Researchers Colloquium (Environ05), Sligo, Ireland, 29th January, 2005
Invited presentation_Compressibility of peat_Environ05 Colloquium_29th Jan 2005.pdf (Accepted for publication (author's copy) - Peer Reviewed) 544.5Kb
The compressibility of some fine and coarse fibrous peats was studied in the laboratory using the oedometer apparatus. Load tests were also conducted on pairs of identical test specimens prepared such that the axis of one specimen was orthogonal to, and the axis of the second specimen parallel to the cross-anisotropic fabric in order to assess the level of compressibility-anisotropy due to the preferential horizontal orientation of the constituent organic solids. The laboratory-measured values for the compression index (Cc), which is used to estimate the amounts of field settlement, were compared with the Cc values predicted using existing empirical correlations. Terzaghi and Peck?s (1967) correlation gave values in close agreement with the laboratory-measured values. An overview of a new laboratory apparatus that is currently being developed to study the reduction in the permeability of peat deposits due to surface loading, such as an embankment, is also presented. The permeability under horizontal and vertical seepage conditions are independently measured on undisturbed block samples of peat which are compressed one-dimensionally by applying increment vertical loads.
Author: O'KELLY, BRENDAN C.
Other Titles:Invited presentation at the 15th Irish Environmental Researchers Colloquium (Environ05)
Type of material:Invited Talk
Availability:Full text available