Long-term behaviour of internal erosion afflicted dams comprising broadly graded soils
2009 (English)In: Dam Engineering, ISSN 0958-9341, Vol. 20, no 2, 149-197 p.Article in journal (Refereed) Published
Internal erosion occurs when fine-grained particles are washed out from a filling material by seepage. Sinkholes and settlements on the dam crest, sudden increased leakage, or muddy seepage may be manifestations of progressed internal erosion. Dams with cores of glacially formed broadly graded soils have been found to be more likely to experience internal erosion than dams composed of other materials. This paper describes and reviews case histories of 30 existing dams constructed from broadly graded soils with performance history of internal erosion. Understanding i) typical signs and observations of internal erosion, ii) the timing of internal erosion incidents, iii) the possible early-warning signs, iv) the possible warning-time, and v) the location of the internal erosion incident on the dam body – may provide tools for early-warning detection of internal erosion prone dams and improve the assessment of internal erosion in existing dams.
Place, publisher, year, edition, pages
Kent UK: Global Trade Media , 2009. Vol. 20, no 2, 149-197 p.
Long-term behaviour, dams, internal erosion, moraine, till, indicators
Mineral and Mine Engineering
IdentifiersURN: urn:nbn:se:kth:diva-14058OAI: oai:DiVA.org:kth-14058DiVA: diva2:329527
QC 201007122010-07-122010-07-122012-12-17Bibliographically approved