20.500.12556/DKUM-39774 VPLIV NIHANJA VODE V AKUMULACIJI NA MEJNA STANJA OBREŽNE PODPORNE KONSTRUKCIJE THE IMPACT OF FLUCTUATIONS IN THE WATER LEVEL IN THE RESERVOIR TO LIMIT STATE OF COASTAL RETAINING CONSTRUCTION Cilj diplomskega dela je presoja vplivov nihanja nivoja vode v akumulaciji na mejna stanja nosilnosti in uporabnosti obrežne podporne konstrukcije. Analiza obravnava konkretni primer načrtovanja sidrane pilotne stene ob akumulacijskem bazenu HE Krško, ki podpira vozišče GC, ki poteka neposredno ob brežini akumulacije in je obložena s kamnito oblogo (skalometom). Rezultati stabilnostnih presoj kažejo, da se vpliv nihanja vode odraža tako pri mejnih stanjih nosilnosti kot tudi pri mejnih stanjih uporabnosti. Nihanje nivoja vode ogroža predvsem stabilnost brežine pod pilotno steno zaradi zaostalega precejanja talne vode zlasti v nekoherentnih zemljinah v zaledju, ker je upadanje nivoja vode v akumulaciji hitrejše od učinkov drenažne sposobnosti zemljin, ki se nahajajo v tleh pred in za podporno konstrukcijo. Diplomska naloga obsega projekt dimenzioniranja vpete podporne konstrukcije ob nihanju nivoja talne vode ojačane z geotehničnimi sidri. Podporna konstrukcija se nahaja ob akumulacijskem jezeru reke Save pred HE Krško. Namen podporne konstrukcije je podpiranje odseka magistralne ceste, katera je v obstoječem stanju zaradi erozije vodnih tokov poškodovana zaradi nihanja vodostaja v akumulacijskem jezeru pred HE Krško ter še ni dokončno rekonstruirana, kot je bilo to predvideno s projektom izgradnje HE. Na začetku naloge smo na kratko opisali zasnovo podporne konstrukcije. V nalogi so opisane osnovne značilnosti podpornih konstrukcij v geotehniki, opisani so tudi standardni projektni pristopi za preverjanje mejnih stanj. V nadaljevanju so opisane geološko geomehanske raziskave, opis izvedenih sondažnih vrtin na samem terenu in raziskav opravljenih v laboratoriju, ki so osnova za analize vplivov ter odporov in dimenzioniranje podporne konstrukcije. Na osnovi pridobljenih notranjih statičnih količin konstrukcije, so opravljene preveritve ustreznosti za posamezne kritične prereze posameznih elementov podporne konstrukcije. Sledi tudi podroben opis rezultatov analiz stabilnosti podpornih konstrukcij, ter na kraju še opis sidranja konstrukcije z geotehničnimi sidri. V zaključnem poglavju je podanih nekaj misli o načrtovanju podpornih konstrukcij ob večjih akumulacijah, ki so izpostavljene občutnim nihanjem nivoja akumulirane vode. The goal of this assignment is to asses the effect of water-level fluctuation in a water reservoir on margin conditions of carrying capacity and functionality of riverbank support construction. Analysis deals with a specific example of anchored pilot wall construction at the water reservoir of HE Krško which supports the traffic road, placed directly by the reservoir's riverbank, which is rock-faced . The results of stability recension show that water-level fluctuations do reflect in margin conditions of carrying capacity, as well as in margin conditions of functionality. Water-level fluctuation threatens especially the stability of the riverbank under the pilot wall due to groundwater percolation, mainly in incoherent soils, because the water-level decrement in a reservoir is faster than the draining capabilities of the soils, which are located in the ground before and behind the support construction. This assignment involves an dimensioning project for fixed support construction reinforced with geotechnical anchors with groundwater-level fluctuation. The support construction is located next to the water reservoir on the Sava river right before HE Krško. The purpose of the support construction is to support a section of the traffic road, which is currently damaged due to water flow erosion, which is caused by water-level fluctuation in the reservoir before the hydro-power plant, and hasn't been reconstructed yet as it was foreseen in the power plant construction project. The beginning of the assignment was dedicated to the description of the support construction design. This paper describes basic support construction characteristics, as well as standardised design approaches for margin conditions verification. Furthermore there is a description of geological geomechanical researches, description of probe bores performed on the field or researches carried out in the lab, which are the foundation for effect and resistance analysis and support construction dimensioning. On the basis of gained internal statical construction quantities, verifications about individual critical section of the support construction individual elements were made. A detailed description of analysis results of support construction stability follows and at the very end a description of construction anchoring with geotechnical anchors. The last chapter gives a few thoughts about support construction planning nearby large reservoirs which are exposed to some substantial accumulated water-level fluctuations. mehanika tal geomehansko projektiranje podporne konstrukcije geomehanska sidra gradbene jame precejanje talne vode ground mechanics geomechanical engineering support constructions geomechanical anchors construction pits groundwater percolation true true false [S. Majcen] Slovenski jezik Angleški jezik Diplomsko delo 2013-02-27 13:32:19 2013-03-04 11:05:35 2022-05-12 23:12:20 2021-04-19 03:08:05 2013 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 624.137(043.2) 17371670 URN:SI:UM:DK:A2SW9TBO VS_Majcen_Simon_2013.pdf VS_Majcen_Simon_2013.pdf 1 5CEAF1BCE4802DD9E9128E535D38C6DC 0c4653be708b320573b9667732ad8a84a9f7506aa57817aa93627481459373d6 341308f2-7c09-11eb-bb7a-00155d0001ca 20.500.12556/dkum/f61eb596-621f-4af5-8629-84e53dd59b15 https://dk.um.si/Dokument.php?lang=slv&id=54007 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo 0 0 0