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Vpliv koeficienta razbremenitve na razvoj konvergenčnih pomikov v predorih : magistrsko delo = Influence of the stress release coefficient on tunnel convergence : master thesisVogrinčič, Rok, gradbenikV novejšem času pridobiva izraba podzemnega prostora vedno večji pomen in vse pogosteje se dogaja, da zato predorogradnja posega v geotehnično zahtevna območja s slabo nosilno in močno deformabilno ... hribino. Zato je za projektanta predhodna napoved konvergenčnih pomikov izrednega pomena, ker na podlagi tega določi velikost deformacijske tolerance, za katero je treba izkopne profile povečati, hkrati pa omogoča varno in gospodarno gradnjo. V magistrskem delu je opisana in uporabljena metoda kontrole konvergenc, ki je ena od uveljavljenih tehnik za načrtovanje predorov, bazirana na analizi interakcije konstrukcije in hribine. Preučene so obstoječe rešitve avtorjev, ki ponujajo zaključene enačbe za napoved konvergenčnih pomikov. V nadaljevanju je bila po analitični poti narejena primerjalna študija vpliva izbire enačbe na vrednost koeficienta razbremenitve. Tu smo se omejili na enačbo Hoeka in rešitev, ki jo predlagata Vlachopoulos in Diederich. Isti postopek smo na koncu ponovili še z uporabo numeričnih orodij (Plaxis 2D) in ga primerjali z rezultati, dobljenimi po analitični poti. Pokaže se, da velikost koeficienta razbremenitve in konvergenčnih pomikov naraščata skupaj z velikostjo cone plastifikacije, ki se formira pri polnem izkopu, zato je enačba Vlachopoulosa in Diedericha primernejša izbira od Hoekove, ker poleg oddaljenosti od čela upošteva tudi velikost radija plastičnosti. Prav tako kaže na dobro ujemanje s Panetovo enačbo, ki opisuje elastično obnašanje. Zanimivo je območje radija plastičnosti 2 < Rp/R < 3, kjer dajeta obe enačbi zelo podobne rezultate, kar vodi do zaključka, da je uporaba Hoekove enačbe omejena na to območje, v ostalih primerih pa je bolj primerno uporabiti rešitev Vlachopoulosa in Diedericha.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [R. Vogrinčič], 2017Language - slovenianCOBISS.SI-ID - 8259425
Author
Vogrinčič, Rok, gradbenik
Other authors
Jovičić, Vojkan |
Šubic Kovač, Maruška
Topics
gradbeništvo |
magistrska dela |
predori |
metoda kontrole konvergenc |
koeficient razbremenitve |
Plaxis 2D |
civil engineering |
master thesis |
tunnels |
convergence confinement method |
stress release coefficient |
Plaxis 2D
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Library/institution |
City | Acronym | For loan | Other holdings |
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Faculty of Civil and Geodetic Engineering, Ljubljana | Ljubljana | FGGLJ |
reading room 1 cop.
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Vogrinčič, Rok, gradbenik | ![]() |
Jovičić, Vojkan | 21680 |
Šubic Kovač, Maruška | 05560 |
Source: Personal bibliographies
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