diplomska naloga
Povzetek
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.
Ključne besede
gradbeništvo;diplomska naloga;UNI;gradbena jama;diafragma;geostatika;togost zemljine;HS model;HSSMALL model;inklinometer;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2016 |
Tipologija: |
2.11 - Diplomsko delo |
Organizacija: |
UL FGG - Fakulteta za gradbeništvo in geodezijo |
Založnik: |
[A. Keleman] |
UDK: |
624.131.5(043.2) |
COBISS: |
7378529
|
Št. ogledov: |
2267 |
Št. prenosov: |
592 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Geostatic analysis of the construction pit Tobačna mesto |
Sekundarni povzetek: |
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. |
Sekundarne ključne besede: |
graduation thesis;construction pit;retaining diaphragm wall;geostatics;soil stiffness;HS model;HSSMALL model;inclinometer; |
Vrsta datoteke: |
application/pdf |
Vrsta dela (COBISS): |
Diplomsko delo |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo |
Strani: |
XII, 110 str., [12] str. pril. |
ID: |
9122957 |