20.500.12556/DiRROS-20214 Water retention properties of stiff silt Retencijske lastnosti trdnih meljev Recent research into the behaviour of soils has shown that it is in fact much more complex than can be described by the mechanics of saturated soils. Nowadays the trend of investigations has shifted towards the unsaturated state. Despite the significant progress that has been made so far, there are still a lot of unanswered questions related to the behaviour of unsaturated soils. For this reason, in the field of geotechnics some new concepts are developed, which include the study of soil suction. Most research into soil suction has involved clayey and silty material, whereas up until recently no data have been available about measurements in very stiff preconsolidated sandy silt. Very stiff preconsolidated sandy silt is typical of the Krško Basin, where it is planned that some very important geotechnical structures will be built, so that knowledge about the behaviour of such soils at increased or decreased water content is essential. Several different methods can be used for soil suction measurements. In the paper the results of measurements carried out on very stiff preconsolidated sandy silt in a Bishop - Wesley double-walled triaxial cell are presented and compared with the results of soil suction measurements performed by means of a potentiometer (WP4C). All the measurement results were evaluated taking into account already known results given in the literature, using the three most commonly used mathematical models. Until now a lot of papers dealing with suction measurements in normal Consolidated and preconsolidated clay have been published. Measurements on very stiff preconsolidated sandy silt, as presented in this paper were not supported before. Zadnje geomehanske raziskave zemljin kažejo na to, da je njihovo obnašanje veliko bolj kompleksno, kot se to lahko opiše z modeli za saturirane Zemljine. Danes se trend raziskav nagiba v področje nesaturiranih materialov. Kljub velikim premikom na tem področju ostaja še vedno veliko vprašanj povezanih z obnašanjem materialov v nesaturiranem območju, zato so se v geotehniki uveljavili novi koncepti modelov, ki vključujejo študij sukcije. Večina preiskav sukcije je osredotočenih na normalno konsolidirani glineni ali meljni material, medtem ko rezultatov preiskav v trdnem, prekonsolidiranem peščenem melju, po dosedaj znanih podatkih, ni objavljenih. Trdni, prekonsolidirani peščeni melj je tipičen za Krško kotlino, kjer se bodo gradili večji geotehnični objekti, in je poznavanje sukcije materiala ob povišanju vlage v njem bistvenega pomena. Za meritev sukcije je bilo uporabljenih več različnih metod. V članku so predstavljeni rezultati meritve sukcije trdnega peščenega melja v Bishop - Wesley dvostenski triosni celici in primerjava z rezultati meritev sukcije v potenciometru (WPC4). Rezultati so potrjeni z matematičnimi modeli, ki so v tovrstni literaturi najbolj poznani. Rezultati raziskav predstavljajo prispevek k poznavanju obnašanja prekonsolidiranega trdnega peščenega melja v nesaturiranih pogojih. peščeni melj trdni melji sukcija Bishop - Wesley triaksialna celica retencijska krivulja potenciometer WP4C true false true Geološki zavod Slovenije Angleški jezik Slovenski jezik © Author(s) 2017 Neznano 2024-08-14 13:51:33 2024-08-14 13:58:03 2024-08-16 03:57:42 0000-00-00 00:00:00 2017 0 0 str. 37-47 št. 1 60 2017 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2017-07-30 55 0016-7789 10.5474/geologija.2017.003 2621781 RAZ_Likar_Barbara_2017.pdf RAZ_Likar_Barbara_2017.pdf 1 B31A6E1279E4CC1B9E7E4BC64A8C263E 9c301a1400667858272cef539fa643ab40fd4357fbb617ee0d48eec20748bcbb b19b7c9a-5a23-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28303 https://doi.org/10.5474/geologija.2017.003 0 a84c0369-5a23-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28302 Zavod za gradbeništvo Slovenije 0 0 0