Kvazistatična metoda za določanje vpliva seizmičnih sil na stabilnost brežine : diplomsko delo

Laznik, Julija (author), Jovičić, Vojkan (mentor)

V diplomskem delu sem predstavila pogoje za pojav nestabilnosti brežin, vzroke in vrste porušitve ter vlogo seizmičnosti pri tem. Podrobneje sem opisala metodi mejnega ravnovesja Fellenius in Bishop ter ju praktično uporabila za izračun stabilnosti brežine v programu MS Excel in v programu Slide. Osrednji del diplomske naloge je predstavitev metode Sarma oziroma kvazistatične metode, ki se prav tako uvršča med metode mejnega ravnovesja, vendar upošteva seizmične sile in je uporabna za vse oblike drsnih površin. V praktičnem delu je na primeru brežine rečne obale, delno potopljene v vodo, z uporabo metode Sarma, prikazan vpliv seizmičnosti na zmanjšano stabilnost brežine. Ker je ob upoštevanju seizmične obtežbe faktor varnosti Fs za izbran primer nezadosten, je prikazan in komentiran predlog preureditve brežine v skladu z veljavnim evropskim standardom za seizmične vplive EC8.

• Language: Slovenian
• Keywords: stabilnost brežine, vpliv seizmičnosti, metoda Fellenius, metoda Bishop, kvazistatična metoda Sarma
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Place of publishing: Ljubljana
• Publisher: J. Laznik
• Year: 2023
• Number of pages: IX, 42 str., XI
• PID: 20.500.12556/RUL-150636
• UDC: 622
• COBISS.SI-ID: 168490243
• Publication date in RUL: 21.09.2023

Secondary language

• Language: English
• Title: Quasi static method for evaluation of seismic forces effect on slope stability : diploma work

Abstract

My diploma thesis constitutes of conditions and causes for slope instability and main types of slope failure regarding (or considering) the influence of seismic effect. Furthermore, the Fellenius and Bishop method of equilibrium balance are presented as is their practical use for determining slope stability in Excel and program Slide. The main emphasis of the thesis is to introduce Sarma method. This is a quasi-static method also based on determining equilibrium balance; however, can be used for any form of sliding surface by considering seismic forces. In the continuation, the methods are used to analyse slope stability on an illustration of a slope partially under water. Moreover, an example is used to show the effect of seismic forces on the decrease of slope stability. As the factor of safety becomes insufficient taking into account the seismic forces in slope analysis, a proposal for the realignment/rearrangement of the slope in accordance with the current European Standard EC8 is shown.

• Keywords: slope stability, seismic effect, Fellenius method, Bishop method, quasi-static Sarma method