Journal of Japan Society of Dam Engineers
Online ISSN : 1880-8220
Print ISSN : 0917-3145
ISSN-L : 0917-3145
Evaluation of the Availability for Filter Zone Material by the Dirty-Water Test
Satoshi YAMADA
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2013 Volume 23 Issue 3 Pages 207-217

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Abstract
One of the roles of filter zone of rock fill dam is to prevent core zone material from being flowed out. This function is expressed under the condition that grading relation of core and filter zone material satisfies the Filter law and permeability coefficient of filter zone is from 10 to 100 times of that of core zone. As a result of preliminary examination conducted in advance of filling test at Tono dam locating within administrative area of Chugoku Regional Development Bureau, grading of core and filter zone material satisfied the Filter law but permeability coefficient of filter zone was more than 100 times of that of core zone. Due to this result, the Dirty-Water Test for this filter zone material was conducted to evaluate its availability for filter zone.
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© 2013 by Japan Society of Dam Engineers
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