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1.
Analytical and numerical factor of safety (uls) calculations on reinforced embankments
Tadej Vidnar, 2017, magistrsko delo

Opis: This thesis deals with factor of safety calculations on geogrid reinforced embankments carried out by commonly used limit equilibrium (LEM) and finite element methods (FEM). The study utilize LEM based software SLIDE and FEM based software PHASE2. The main difference between these two approaches is that the LEM methods are based on the static of equilibrium whereas FEM methods utilise the stress strain relationship. Unlike to LEM, numerical analysis also computes displacements. For practical example of a geogrid reinforced embankment the factor of safeta (FoS) is calculated. Reinforced soil structures are nowadays utilized for a lot of civil engineering applications. Traditionally, the design of geogrid reinforced soil is performed using analytical methods (LEM). Unfortunately, these methods missing the fundamental physics of stress-strain relationship and are therefore not able to compute a realistic stress distribution. In first step of the analysis the FoS is carried out with analytical approach. The most rigorous LEM methods, Bishop’s, Spencer’s and Morgenstern-Price are selected and the FoS for circular and polygonal slip surface is calculated. In second step of the analysis the FoS is carried out with numerical approach. Shear strength reduction (SSR) procedure was performed to determine the critical strength reduction factor (SRF) which represents the FoS of slope.
Ključne besede: civil engineering, finite element method (FEM), limit equilibrium method (LEM), embankments, slope stability, bearing capacity failure, geosynthetics, geogrids, shear strains
Objavljeno v DKUM: 27.09.2017; Ogledov: 881; Prenosov: 165
.pdf Celotno besedilo (17,05 MB)

2.
Sanacija plazu s kamnitimi drenažnimi rebri
Tadej Vidnar, 2014, delo diplomskega projekta/projektno delo

Opis: Diplomski izpit obravnava načine sanacij plazišč v geotehniški stroki ter geotehnično merjenje in stabilitetno presojo obravnavanega plazišča ZBIL-KURAJ v občini Rogaška Slatina. V uvodnem poglavju so navedeni namen, cilji in struktura projektne naloge. Poglavje 2 opisuje vzroke nastanka, načine premikanja in veljavno zakonodajo na področju varstva pred zemeljskimi plazovi. Poglavje 3 opisuje potrebne aktivnosti, vrste meritev in načine sanacij zemeljskih plazov. V okviru projektne naloge je prikazan način sanacije obsežnega plazišča dolžine L=123m, širine B=33m in z globino do 5.0m. Z ozirom na razprostranost plazišča in obilo talne vode v njem je predložena sanacija s kamnitimi drenažnimi rebri. S stabilitetnimi presojami je dokazana zadostnost predvidenih sanacijskih ukrepov skladno s SIST EN1997. Ocenjujemo, da je predložena sanacija tudi ekonomsko najustreznejša.
Ključne besede: gradbeništvo, plaz, sanacija, drenažno rebro
Objavljeno v DKUM: 27.08.2014; Ogledov: 1638; Prenosov: 321  (1 glas)
.pdf Celotno besedilo (2,54 MB)

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