diplomska naloga
Tine Ferk (Author), Boštjan Pulko (Mentor), Darko Beg (Thesis defence commission member), Janko Logar (Thesis defence commission member)

Abstract

Geostatična analiza gradbene jame Zeleni park v Kopru ob upoštevanju togosti tal pri majhnih deformacijah

Keywords

gradbeništvo;UNI;diplomska dela;gradbena jama Zeleni park II;dimgeotehnične raziskave;armiranobetonska diafragma;nelinearen materialni model za zemljine;HS model;HSS model;dimenzioniranje;Plaxis;

Data

Language: Slovenian
Year of publishing:
Source: Ljubljana
Typology: 2.11 - Undergraduate Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: [T. Ferk]
UDC: 624.152(497.4Koper)(043.2)
COBISS: 6447969 Link will open in a new window
Views: 2253
Downloads: 585
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Other data

Secondary language: English
Secondary title: Geostatic analysis of the construction pit Zeleni park in Koper considering small-strain stiffness of soil
Secondary abstract: The subject of diploma thesis is a geostatic analysis for the protection of a deep construction pit for the facility Zeleni park in Koper. This demanding construction pit was dug in sea sediments. Demanding geotechnical conditions required the use of “top-down” method to protect the construction pit with progressive opening of a reinforced concrete diaphragm wall using basement facility plates. Such construction requires a geotechnical calculation of the construction pit considering excavation phases. The main goal of diploma paper is to evaluate the geotechnical research and to make geostatic analyses for construction pit protection observing different material models for soil in undrained, partially drained and drained conditions, followed by a comparison of results. Diploma paper begins with information about the location and soil structure. Geotechnical researches are resumed and implementation technology in relation to construction pit protection is explained. In continuation, comparative calculations of construction pit protection with the diaphragm wall are presented using two material models for soil with isotropic hardening: the Hardening Soil Model (HS) and the Hardening Soil Model with Small-Strain Stiffness (HSS) which also observes small-strain stiffness of the ground. A calculation of maximum axial forces in bracing plates is made for each model with maximum values of transverse forces, bending moments in diaphragm wall and diaphragm wall shifts. Diaphragm wall was dimensioned for all analyses. Results of geotechnical analyses confirmed the reasonable use of the HSS model which observes small-strain stiffness of the ground. Calculation shifts of protection construction and the background are more realistic when the ground is considered for small strain, with less force impact on the diaphragm wall and on bracing plates.
Secondary keywords: graduation thesis;civil engineering;construction pit Zeleni park;reinforced concrete diaphragm wall;non-linear material model for soil;HS model;HSS model;dimensioning;Plaxis;
File type: application/pdf
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: XII, 69 f.
Type (ePrints): thesis
Title (ePrints): Geostatic analysis of the Zeleni park construction pit in Koper considering small-strain soil stiffness
Keywords (ePrints): Gradbena jama Zeleni park II;geotehnične raziskave;armiranobetonska diafragma;nelinearen materialni model za zemljine;HS model;HSS model;dimenzioniranje;Plaxis
Keywords (ePrints, secondary language): Construction pit Zeleni park;geotechnical research;reinforced concrete diaphragm wall;non-linear material model for soil;HS model;HSS model;dimensioning;Plaxis
Abstract (ePrints): Predmet diplomske naloge je geostatična analiza zaščite globoke gradbene jame za objekt Zeleni park v Kopru. Gre za zahtevno gradbeno jamo v morskih sedimentih. Zaradi zahtevnih geotehničnih pogojev je bila za gradnjo objekta in varovanje gradbene jame uporabljena metoda gradnje od zgoraj navzdol s sprotnim razpiranjem armiranobetonske (AB) diafragme s kletnimi ploščami objekta („top-down“ metoda). Tak način gradnje zahteva geotehnični izračun zaščite gradbene jame ob upoštevanju faznosti gradnje. Cilj diplomske naloge je izvrednotenje geotehničnih raziskav, izdelava geostatičnih analiz zaščite gradbene jame, ob upoštevanju različnih materialnih modelov za zemljine v nedreniranih, delno dreniranih in dreniranih pogojih in primerjava rezultatov. V nalogi so uvodoma podani podatki o lokaciji in sestavi tal. Povzete so geotehnične raziskave in pojasnjena tehnologija izvedbe zaščite gradbene jame. V nadaljevanju so predstavljeni primerjalni izračuni zaščite gradbene jame z AB diafragmo, ki so narejeni z uporabo dveh različnih materialnih modelov za zemljine z izotropnim utrjevanjem in sicer z modelom » Hardening soil model« (HS) in »Hardening Soil model with small-strain stiffness« (HSS), ki dodatno upošteva togost tal pri majhnih deformacijah. Za vsak model so izračunane maksimalne osne sile v razpornih ploščah in maksimalne vrednosti prečnih sil in upogibnih momentov v diafragmi ter pomiki diafragme. Za vse analize smo izvršili dimenzioniranje diafragme. Iz rezultatov geotehničnih analiz je razvidno, da je pri izračunih gradbenih jam smiselna uporaba modela HSS, ki upošteva togost tal pri majhnih deformacijah. Računski premiki zaščitne konstrukcije in zaledja so zaradi upoštevanja tal pri majhnih deformacijah bolj realni (manjši), nekoliko manjše pa so tudi obremenitve v AB diafragmi in v razporah.
Abstract (ePrints, secondary language): The subject of diploma thesis is a geostatic analysis for the protection of a deep construction pit for the facility Zeleni park in Koper. This demanding construction pit was dug in sea sediments. Demanding geotechnical conditions required the use of “top-down” method to protect the construction pit with progressive opening of a reinforced concrete diaphragm wall using basement facility plates. Such construction requires a geotechnical calculation of the construction pit considering excavation phases. The main goal of diploma paper is to evaluate the geotechnical research and to make geostatic analyses for construction pit protection observing different material models for soil in undrained, partially drained and drained conditions, followed by a comparison of results. Diploma paper begins with information about the location and soil structure. Geotechnical researches are resumed and implementation technology in relation to construction pit protection is explained. In continuation, comparative calculations of construction pit protection with the diaphragm wall are presented using two material models for soil with isotropic hardening: the Hardening Soil Model (HS) and the Hardening Soil Model with Small-Strain Stiffness (HSS) which also observes small-strain stiffness of the ground. A calculation of maximum axial forces in bracing plates is made for each model with maximum values of transverse forces, bending moments in diaphragm wall and diaphragm wall shifts. Diaphragm wall was dimensioned for all analyses. Results of geotechnical analyses confirmed the reasonable use of the HSS model which observes small-strain stiffness of the ground. Calculation shifts of protection construction and the background are more realistic when the ground is considered for small strain, with less force impact on the diaphragm wall and on bracing plates.
Keywords (ePrints, secondary language): Construction pit Zeleni park;geotechnical research;reinforced concrete diaphragm wall;non-linear material model for soil;HS model;HSS model;dimensioning;Plaxis
ID: 8313065