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Characteristics of varved clays of the Elk Valley, British Columbia, Canada
Abstract The interrelationships among selected geotechnical characteristics and microstructure for Late Pleistocene glaciolacustrine varved clay from a site in the Elk Valley, southeastern British Columbia, Canada, are presented. Oedometer test results revealed preconsolidation pressures greater than would be expected under the previous maximum overburden cover. The presence of segmented failure envelopes (i.e. possessing over- as well as normally-consolidated regions) and moderately high liquidity indices suggest the presence of cementation bonding. This conclusion is supported by the porous laminar-matrix microstructure of the varved clay. Natural slope instability is influenced by horizontal seepage within highly permeable interbeds in the clay, the main mode of failure being rotational slumping. Slopefailure appears governed by shear strength parameters that are intermediate between those yielded by the over- and normally-consolidated regions of the failure envelope.
Characteristics of varved clays of the Elk Valley, British Columbia, Canada
Abstract The interrelationships among selected geotechnical characteristics and microstructure for Late Pleistocene glaciolacustrine varved clay from a site in the Elk Valley, southeastern British Columbia, Canada, are presented. Oedometer test results revealed preconsolidation pressures greater than would be expected under the previous maximum overburden cover. The presence of segmented failure envelopes (i.e. possessing over- as well as normally-consolidated regions) and moderately high liquidity indices suggest the presence of cementation bonding. This conclusion is supported by the porous laminar-matrix microstructure of the varved clay. Natural slope instability is influenced by horizontal seepage within highly permeable interbeds in the clay, the main mode of failure being rotational slumping. Slopefailure appears governed by shear strength parameters that are intermediate between those yielded by the over- and normally-consolidated regions of the failure envelope.
Characteristics of varved clays of the Elk Valley, British Columbia, Canada
George, H. (author)
Engineering Geology ; 23 ; 59-74
1986-05-02
16 pages
Article (Journal)
Electronic Resource
English
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