20.500.12556/DKUM-70814 Settlement of weakly cemented tufas Usedanje šibko cementiranega tufa Weakly cemented tufas are sand and silt size soils that are weakly bonded with thin films of carbonate cement. The void ratio is rather high and equal to approximately 1.2. Collapse occurs as a result of the destruction of the weak bonds upon loading and/or wetting. The index properties and the collapse potential (Cp) of tufa were determined in the laboratory. In the determination of the collapse-potential values the single-ring oedometer method was considered to be a suitable and simpler tool. In plotting the oedometer test results the use of a natural scale was preferred over a logarithmic scale so that the void ratio-pressure relationship is polynomial. Under loading the soil settles with the natural water content; however, saturation increases the collapse that is initially triggered by the pressure increase. The pressure level is a significant parameter in the magnitude of the collapse and therefore in the total settlement. The settlement of foundations due to a collapse of the soil structure can be estimated directly using the oedometer test results and empirically using the index properties, like the initial void ratio (e0), the difference in the fine content between the dry and the wet sieve analyses (PFAW) and the natural unit weight. A comparison of the direct and empirical approaches yielded a good agreement. Šibko cementiran tuf je zemljina z velikostjo zrn peska in melja, ki so šibko povezana s tankimi plastmi karbonatnega cementa. Količnik por je dokaj velik, okoli 1,2. Zrušitev teh zemljin se pojavi kot rezultat popuščanja rahlih vezi zaradi obtežitve ali namočenosti. Njihove indeksne lastnosti in zrušitveni potencial smo določili v laboratoriju. Pri določanju vrednosti zrušitvenega potenciala smo uporabili edometrsko metodo, s tem da smo pri risanju rezultatov testov privzeli naravno skalo in ne logaritemske, tako da je razmerje med količnikom por in tlakom polinomsko. Pri obremenitvi se naravno vlažna zemljina posede, poveča se zasičenost in s tem obseg zrušitve. Pritisk je pomemben parameter pri obsegu zrušitve in s tem tudi pri celotnem posedku. Posedanje temeljev zaradi zrušenja zemljinske strukture lahko neposredno ocenimo iz rezultatov edometrskih testov in empirično z uporabo indeksnih lastnosti kot so začetni količnik por, razlika v fini sestavi med suho in mokro sejalno metodo in prostorninska teža. Primerjava med direktnimi in empiričnimi pristopi je pokazala precejšnje ujemanje. Antalya collapse potential collapsible soils settlement tufa geotehnika zgradbe tuf usedline zrušljive zemljine zrušitveni potencial Turčija Antalya zrušitveni potencial usedlina tuf true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-06-14 11:21:17 2018-06-14 11:23:53 2022-08-01 19:51:29 2019-07-11 18:20:43 2014 0 0 str. 29-39 št. 1 Letn. 11 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 624.13 215987712 281002240 1854-0171 URN:SI:UM:DK:BB01YA04 Acta_geotechnica_Slovenica_2014_Nihat,_Ufuk,_Vedat_Settlement_of_weakly_cemented_tufas.pdf Acta_geotechnica_Slovenica_2014_Nihat,_Ufuk,_Vedat_Settlement_of_weakly_cemented_tufas.pdf 1 2753E93FE994AEEFC67FB97627BA0AD0 0fc7729aa3d1f093bb6866aa722ed61a5633b5ab1f87c0b8a1828080364e6366 08675aa8-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/78fb3d90-859f-4291-80a5-405293d3a5d2 https://dk.um.si/Dokument.php?lang=slv&id=125667 http://fgserver3.fg.um.si/journal-ags/2014-1/article-3.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=125668 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0