Fissuring from hydraulic fracture of clay soil

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ConferenceProceedings, 10th International Conference on Soil Mechanics and Foundation Engineering: 15 June 1981, Stockholm, Sweden
Pages513518; # of pages: 6
Subjectsensitive clay; breakage; hydraulic tests
AbstractHydraulic fracture tests were carried out in two geologically different soft sensitive clays in order to study the fracture pattern which had formed in situ around inserted piezometers. Piezometers of different lengths were used in the test program, and a methylene blue dye was used to mark the fissures. The fractured clay was recovered with a large diameter block sampler and the fissures identified and mapped. Well defined vertical fractures developed around the long piezometer tips but not around the ones of zero length. In all tests, however, fractures inclined from 20 to 35 degrees from the horizontal developed above each piezometer tip, tracing the surface of an inverse cone with its apex at the top of the piezometer. The paper discusses the fracture patterns and the effects of piezometer length, time of embedment, and the effect of soil disturbance, caused by installing the piezometers, on hydraulic fracture test results.
Publication date
PublisherA.A. Balkema Publ., P.O. Box 1675, NL 3000, BR Rotterdam, Netherlands.
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number19688
NPARC number20375369
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Record identifiera36ec2e2-5c56-4af0-bd86-a1f78b106e99
Record created2012-07-23
Record modified2016-05-09
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