20.500.12556/DKUM-72664 Evaluation of the constriction size reduction of granular filters due to upstream cohesive base-soil erosion Vrednotenje zmanjšanja velikosti zožitve zrnatih filtrov zaradi interne erozije osnovnih kohezivnih zemljin This study is devoted to filter-constrictions analysis and its application with respect to void and constrictions reduction during soil filtration. The experimental investigation involves combined Hole Erosion-Filtration tests using several soils and filters. The base soils are lean clays and the granular filters are selected according to the usual filtration criteria. The combination of the experimental data for porosity variation and the analytical results from the Constriction Size Distribution (CSD) analysis was used to evaluate the constrictions size reduction subsequent to the filtration process. The filtration depth was also estimated according to the retained soil mass and the porosity reduction deduced from the measured hydraulic conductivity. An analytical model of the CSD was applied to the experimental results in order to assess the constrictions reduction. As regards the obtained results, a nonuniform constriction reduction was suggested according to the effective filtration depth, advocating a dynamic filter action. Ta študija obravnava analizo filtrirnih zožitev in njeno uporabo glede zmanjšanja por in zožitev med filtriranjem tal. Eksperimentalna preiskava vključuje kombinirane preizkuse erozije-filtriranja v luknji z več zemljinami in filtri. Osnovno zemljino predstavlja peščena glina, medtem, ko so zrnati filtri izbrani glede na običajna filtracijska merila. Kombinacija eksperimentalnih podatkov o spreminjanju poroznosti in analitičnih rezultatov analize porazdelitve zožitve (CSD) je bila uporabljena za vrednotenje zmanjšanja velikosti zožitev zaradi filtracijskih procesov. Globina filtracije je bila ocenjena tudi glede na zadržano maso zemljine in zmanjšanje poroznosti, ki izhaja iz izmerjene hidravlične prepustnosti. Za ocenitev zmanjšanja zožitev je bil uporabljen analitični model CSD, ki je upošteval eksperimentalne rezultate. Glede na dobljene rezultate je predlagana neenakomerna zožitev glede na efektivno globino filtracije, ki potrjuje dinamično delovanje filtra. granular filter internal erosion constriction porosity filtration index zrnati filter notranja erozija zožitev poroznost indeks filtriranja true false true Angleški jezik Slovenski jezik Znanstveno delo 2018-10-11 12:08:11 2018-10-11 12:09:58 2023-07-31 12:23:31 2019-07-11 19:26:30 2018 0 0 str. 29-41 št. 1 Letn. 15 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 215987712 305157120 10.18690/actageotechslov.15.1.29-41.2018 1854-0171 URN:SI:UM:DK:PPXREDVO Acta_geotechnica_slovenica_2018_Azirou,_Benamar,_Tahakourt_Evaluation_of_the_constriction_size_reduction_of_granular_filters_due_to_upst.pdf Acta_geotechnica_slovenica_2018_Azirou,_Benamar,_Tahakourt_Evaluation_of_the_constriction_size_reduction_of_granular_filters_due_to_upst.pdf 1 20902F7D7B97396BAF3FB848D11C7878 f42602b978ae6c088ed44ce527261232f04f8197c4a05221321ad86a99ad1140 78479fef-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/b5c89412-17b4-4ccb-8132-03bd83825ad5 https://dk.um.si/Dokument.php?lang=slv&id=131015 http://fgserver6.fg.um.si/journal-ags/2018-1/article-3.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=131014 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0