diplomska naloga
Adriana Keleman (Author), Boštjan Pulko (Mentor), Janko Logar (Thesis defence commission member), Jana Šelih (Thesis defence commission member)

Abstract

V diplomski nalogi je na konkretnem primeru varovanja gradbene jame z debelostensko diafragmo, za katero obstajajo z inklinometrom izmerjeni pomiki, prikazano, da je v analizah geotehničnih objektov za natančnejšo napoved obnašanja le teh pomembno upoštevati togost tal pri majhnih deformacijah in nelinearen odnos med napetostmi in deformacijami. V programskem orodju Plaxis 2D smo izvedli geostatične analize varovanja gradbene jame ob upoštevanju dveh različnih modelov. Upoštevali smo nelinearno elastični model z izotropnim utrjevanjem (Hardening Soil Model – HS model) in nelinearno elastičen model z izotropnim utrjevanjem in upoštevanjem togosti pri majhnih deformacijah (Hardening Soil Small Strain Model – HSSMAL Model). Pri analizah smo se omejili na primerjavo upogibnih momentov in horizontalnih pomikov diafragme. Rezultati analiz, ki upoštevajo HS model, so pokazali, da so upogibni momenti in horizontalni pomiki diafragme v primerjavi z inklinometerskimi meritvami horizontalnih pomikov diafragme precenjeni, medtem ko smo z uporabo HSSMALL modela veliko bližje izmerjenim vrednostim na terenu in je zato bolj primeren za analizo takšnih konstrukcij.

Keywords

gradbeništvo;diplomska naloga;UNI;gradbena jama;diafragma;geostatika;togost zemljine;HS model;HSSMALL model;inklinometer;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: [A. Keleman]
UDC: 624.131.5(043.2)
COBISS: 7378529 Link will open in a new window
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Downloads: 592
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Other data

Secondary language: English
Secondary title: Geostatic analysis of the construction pit Tobačna mesto
Secondary abstract: The thesis deals with the stiffness of soils at small strains. The analysis of excavation supported by the retaining diaphragm wall, for which horizontal movements with inclinometers were measured during and after construction, shows that small strain stiffness and its nonlinear dependancy on the strain amplitude should be properly taken into account to get reliable predictions of displacements. Finite element numerical analyses with computer program Plaxis were carried out taking into account two different material models: The nonlinear elasto-plastic model with isotropic hardening (Hardening Soil Model – HS model) and nonlinear elasto-plastic model with isotropic hardening and small strain stiffness (Hardening Soil Small Model – HSSMALL Model). The analyses were limited to the comparisson of bending moments and horizontal displacement of the diaphragm wall. The results of analyses, that consider HS model, show, that the bending moments and horizontal displacements are higher compared to inclinometer measured horizontal displacements. The HSSMALL model gives much better predictions as compared to the measured values of displcemants and therefore is more convenient for the analyses of such constructions.
Secondary keywords: graduation thesis;construction pit;retaining diaphragm wall;geostatics;soil stiffness;HS model;HSSMALL model;inclinometer;
File type: application/pdf
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: XII, 110 str., [12] str. pril.
ID: 9122957