- Type of paper
: Paper in book
Title: Use of geotextile and impervoius membranes in building
environmental-protection structures
- Authors:
- Jašarević, Ibrahim (18195)
- Editors
- Babić, Branimir
Publisher: "Vartilen" Industrija poliestera
Year: 1994
Pages: from 95 to 103
Language: hrvatski
Summary: Due to its properties, the geotextile, and especially
impervious membranes (geogrids), are increasingly applied in the
realization of environmental protection structures. Waste dumps must
nowadays be designed, built and monitored as sophisticated structures, so
as to prevent their harmful influence on air, soil and water. Urban dumps
with sealing systems are analyzed in the paper. Main principles for using
geotextile and geo-membranes in environmental protection are also
presented.
Keywords: urban dumps, sealing systems, garbage-dump improvement
- Type of paper
: Paper in book
Title: Modeling geotechnical problems in rock mass - Computer
program FLAC
- Authors:
- Jašarević, Ibrahim (18195)
- Kovačević, Meho-Saša
- Mišćević, Predrag
- Editors
- Simović, Veselin
Publisher: Hrvtasko društvo građevinskih inženjera
Year: 1994
Pages: from 503 to 540
Language: hrvatski
Summary: One of the basic problems in rock and soil mechanics is the
complexity of rock and soil behavior, particularly when it is necessary to
describe their stress and strain properties. The FLAC (Fast Lagrangain
Analysis of Continua) is a computer program used as a designer's tool and a
research and development environment suitable for modeling in the field of
geotechnics, particularly in rock mechanics.
The use of FLAC in tunneling and foundation engineering, also including
analysis of interaction for discontinuous or bedded rock mass, is presented
and illustrated by appropriate examples.
Keywords: rock mechanics, numerical analysis, stratification, discontinuities, stress-strain notation
- Type of paper
: Paper in journal
Title: Assembled Reinforced Concrete Anchored Retaining Walls
- Authors:
- Jašarević, Ibrahim (18195)
Journal: Ceste i mostovi
Number: 10
ISSN: 0411-6380
Volume: 37
Year: 1991
Pages: from 271 to 274
Number of references: 5
Language: hrvatski
Summary: From foreign experiences it is known that the
supporting ofhigh cuts (12m) is practically imposible without the
anchoredretaining wals, because the traditional retaining walls
becomeinconvenient, specially in the case of seismic force.
Reliableinvestigations of the fracture mechanism are missing, speciallyin
the sphere of seismic loading of such structures.
In the world, from 1970 to 1986, there is a huge increase inapplication
of the assembled reinforced concrete anchoredretaining walls. More than ten
times so, according to the data ofthe multinational company Terra Armata
from Italy.
Keywords: reinforced concrete, anchorage, cutting (earthworks), retaining wall, seismic, load
- Type of paper
: Paper in journal
Title: Protection of a Rock Slope of the Zvir Water Spring in
Rijeka
- Authors:
- Jašarević, Ibrahim (18195)
- Srkoč, Miljenko (44352)
- Biondić, Božidar
- Koržinek, Lucijan
- Kovačević, Meho-Saša
- Lisac, Krešimir
- Dukarić, Franjo
- Kulić, Željko
Journal: Građevinar
Number: 5
ISSN: 0350-2465
Volume: 45
Year: 1993
Pages: from 259 to 268
Number of references: 10
Language: hrvatski
Summary: The paper presents the designing and construction of
theprotection a high rock slope above the most significant spring ofthe
city of Rijeka. After detailed investigations, rockstabilisation was
carried out applying Dywidag-system singlestiff anchors with double
protection against corrosion andmicroreinforced slurry-myx concrete with
polypropilene fibres.This solution with the new technology in rock
stabilisation hasbeen applied in Croatia for the first time and proved to
berational after completion.
Keywords: rock slope, anchoring, weathered rock stabilisation, rock mass classification, stiff anchors
- Type of paper
: Paper in journal
Title: Relation between mineralogical-petrographical composition
and geotechnical properties of flisch layers
- Authors:
- Jašarević, Ibrahim (18195)
- Kovačević, Meho-Saša
Journal: Građevinar
Volume: 46
Year: 1994
Pages: from 85 to 94
Language: hrvatski
Summary: The results of engineering-geological, mineralogical,
petrographical and geotechnical (laboratori and in situ) investigations of
flysch layers are presented in the paper. These investigation were
performed over the last fifteen years in the coastal areas of the Adriatic
in the Republic of Croatia. The information collected enabled establishment
of number of corelations between mineralogical-petrographical composition
and geotehnical properties of flysch layers. Additional investigations are
currently carried out to obtain further information and the established
correlations are critically analyzed. The investigations performed and the
relations established enable development of more rational solutions at the
stage of evaluation, design and construction of structures in areas
sharacterizes by flysh formations.
Keywords: flysh, correlations, mineralogical-petrographical, geotehnical
- Type of paper
: Paper in proceedings
Title: Assembled Reinforced Concrete Anchored Retaining Walls
- Authors:
- Jašarević, Ibrahim (18195)
- Editors
- Mavar, Ramon
- Kovačić, Davorin
- Vrkljan, Marko
Proceedings title: Saopćenja I Savjetovanja Društva za mehaniku tla i temeljenje Hrvatske
Language: hrvatski
Place: Opatija
Year: 1989
Pages: from 99 to 104
Meeting: I Savjetovanje Društva za mehaniku tla i temeljenje Hrvatske
Held: from 11/16/89 to 11/18/89
Summary: From foreign experiences it is known that the supporting of
highcuts (H > 12m) is practically imposible without the anchoredretaining
walls, because the traditional retaining walls becomeinconvenient,
specially in the casse of seismic force.
Keywords: cutting (earthworks), anchorage, retaining wall, load
Other: Tiskan Zbornik radova 1992 god.
- Type of paper
: Paper in proceedings
Title: Aplication of computer programme package Z_SOIL for
stability and foundation analyses
- Authors:
- Jašarević, Ibrahim (18195)
- Kovačević, Meho-Saša
- Editors
- Jašarević, Ibrahim (18195)
Proceedings title: Primjena osobnih računala u geotehnici
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 1 to 21
Meeting: Seminar: Primjena osobnih računala u geotehnici
Held: from 04/22/92 to 04/25/92
Summary: Theoretical bases of computer programme Z_SOIL,
tagetherwith the review of its possibilities for stability analysis
ofanchored retaining walls and foundations are shown. Some resultsof
practical aplication of this computer package are presented inthe work,
too.
Keywords: computer programme package Z_SOIL, slope stability analysis, anchored retaining structures, bridge foundation in anizotropic media
Other: Seminar održan 1992 i 1993 godine na Građevinskom fakultetu
uZagrebu.
- Type of paper
: Paper in proceedings
Title: Aplication of FEM in Foundation Design of Heavy Structures
on Rock
- Authors:
- Jašarević, Ibrahim (18195)
- Editors
- Dvornik, Josip
- Pičulin, Srećko
- Radić, Jure
- Srkoč, Miljenko (44352)
- Šavor, Zlatko
- Šimunić, Želimir
Proceedings title: Zbornik radova "Kompjutor u obnovi Hrvatske"
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 335 to 346
Meeting: Kompjutor u obnovi Hrvatske
Held: from 05/13/92 to 05/15/92
Summary: Great possibilities of using numerical methods in
geotechnicsare indicated through several examples of applying FEM
infoundation design of heavy structures in rock massifs. Quiterational
foundation solutions may be found by applying personalcomputers and program
packages that enable parametric analysis bydescribing either isotropic or
anisotrophic rock mass behaviorincluding the corresponding mechanical
properties. In the courseof such computations, the possibilities of rock
mass improvementbelow and around foundations may also be simulated
(grouting,bolting and replacement concrete).
Keywords: FEM-finite element metod, foundation design of heavy structures in rock massifs, isotropic or anisotropic
- Type of paper
: Paper in proceedings
Title: New technical solution in high rocky slope lining
- Authors:
- Jašarević, Ibrahim (18195)
- Ukrainczyk, Velimir
- Rak, Zvonko
- Editors
- Đukan, Petar
Proceedings title: Zbornik radova "Organizacija i menagement u graditeljstvu"
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 299 to 312
Meeting: V simpozij "Organizacija i menagement u graditeljstvu"
Held: from 04/21/93 to 04/22/93
Summary: New tecnical solution for rock slope lining are
presented.They consist of rigid prestressed anchors provided with
doubleanticorrosive protection and with polypropilene fibres
reinforcedshortcrete. The feasibility of this solution is proved on
theexecuted structure by detailed in situ and laboratory tests.
Keywords: rock slope, geotechnical rigid anchor, fibre reinforced shotcrete polipropylene fibres, local and global stability, stress-strain states, feasibility.
Other: Prijavljen patent patentnom uredu Republike Hrvatske -
svibanj1993. godine. Autori: V.Ukrainczyk-I.Jašarević-Z.Rak.
- Type of paper
: Paper in proceedings
Title: Application of PP fibre reinforced shotcrete and rigid
bolts in high slope rock lining
- Authors:
- Jašarević, Ibrahim (18195)
- Ukrainczyk, Velimir
- Rak, Zvonko
- Kovačević, Meho-Saša
- Editors
- Radić, Jure
Proceedings title: Zbornika radova "Graditelji u obnovi Hrvatske"
Language: hrvatski
Place: Brijuni
Year: 1993
Pages: from 181 to 188
Meeting: Graditelj u obnovi Hrvatske
Held: from 10/13/93 to 10/15/93
Summary: Classical types of high reinforced concrete walls (h >
12m),with costs higher than 400 DEM/m2 are technically
inconvinient,especially in seismic active regions, and expencive.
Thepresented new technical solution consists of rock mass cojugatedwith
polypropilen fibres reinforced shotcrete (PPFRS) by means ofprestressed
anchors. The most convinient properties ofconstituents are used: tensile
strength of anchors, thougness,bending and shear strengths of PPFRS and
compressive strength ofrock. The price of this structure is lower than 200
DEM/m2. Inthe paper are presented teoretical principles, analyses
ofstability factor, and state of stresses and deformations with oneconcrete
example. The feasibility of this solution is proved byin situ tests.
Keywords: rock slope, weathered rock, rock mass classification, microreinforced slurry-mix concrete, anchoring, stiff anchors
- Type of paper
: Paper in proceedings
Title: High slope stability in the case of improvement of the
mechanical properties of the rock mass
- Authors:
- Jašarević, Ibrahim (18195)
- Kovačević, Meho-Saša
- Kulić, Željko
- Editors
- Riberio E Sousa, L.
- Grossmann, N.F.
Proceedings title: Safety and Environmental Issues in Rock Engineering
Language: engleski
Place: Rotterdam, Holand
Year: 1993
ISBN/ISSN: 90 5410 3396
Pages: from 817 to 826
Meeting: ISRM International symposium EUROCK'93
Held: from 06/21/93 to 06/24/93
Summary: The rock massif strengthening using
micro-reinforcedshotcrete (MRS) with polypropylene fibers and prestressed
boltsof high rigidity is presented in the paper. The results ofcarbonate
rock complex classification and those obtained bygeotechnical laboratory
testing of rock samples andmicro-reinforced shotcrete, including results of
the in situtesting of the strengthened massif's mechanical properties
areequally provided. A numerical analysis of a strengthened rockslope over
40 m in height and inclined to approx. 85 degrees wasalso made and is
presented in the paper.
Keywords: rock massif, polypropylene fibres reinforced shotcrete, prestressed bolts of high rigidity, calculation model
- Type of paper
: Paper in proceedings
Title: Plane equilibrium of rock slopes with anchors
- Authors:
- Kovačević, Meho-Saša
- Jašarević, Ibrahim (18195)
- Kulić, Željko
- Editors
- Pasamehmetoglu, A.G.
- Kawamoto, T.
- Whittaker, B.N.
- Aydan, O.
Proceedings title: Assesment and Prevention of Failure Phenomena in Rock Engineering
Language: engleski
Place: Rotterdam, Holand
Year: 1993
ISBN/ISSN: 90 54 10 3094
Pages: from 653 to 660
Meeting: International Symposium Assesment and Prevention of Failure Phenomena in Rock Engineering
Held: from 04/05/93 to 04/07/93
Summary: The static and seismic stability of rock slopes
withreinforced anchors is analyzed as as 2-D problem. The mainemphasis in
the analysis in on the influence of the bearingcapacity and the length of
anchors, the reinforcing forces,elastic characteristics of rock and grouts,
as well as theinclination of the failure surface and anchors in contact
withthe surrounding rock, the parametric analysis in influence of theabove
mentioned factors is proposed. This analysis was carriedout using computer
program SASPOGS which enables analysis ofdifferent influences on the slope
stability in both static andseismic conditions.
Keywords: static and seismich stability, reinforced anchors, ultimate bearing capacity, initial stifness
- Type of paper
: Paper in proceedings
Title: Corelation dependencies of geotechnical properties of
limestone-dolomitic rocks
- Authors:
- Cerić, Anita
- Jašarević, Ibrahim (18195)
- Kovačević, Meho-Saša
- Editors
- Mavar, Ramon
Proceedings title: Zbornik radova znanstveno stručnog savjetovanja "Geotehnika prometnih građevina"
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 159 to 168
Meeting: Geotehnika prometnih građevina
Held: from 10/05/94 to 10/08/94
Summary: In the paper are reported the results of geotechnical
laboratory and in situ tests on limestone-dolomitic rocks in Croatia. This
data have enabled to establish correlations between results of specific
structural and physico-mechanical properties obtained during the
engineering geological mapping, investigation drilling geophysical
investigations and laboratory and in situ geotechnical testing. The
conducted investigatins and established laws enable rational solutions in
design and constrction of bildings in limestone-dolomitic rocks.
Keywords: correlations, limestone-dolomitic rocks, laboratory and in situ test
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Ukrainczyk, Velimir
- Jašarević, Ibrahim (18195)
Proceedings title: Proceedings of the second International Symposium
Language: engleski
Place: Ljubljana, Slovenija
Year: 1994
Pages: from 265 to 274
Meeting: Tunnel construction and underground structures
Held: from 09/28/94 to 09/30/94
Summary: The results of laboratory research and field tests to
investigate the possibility of using the polypropylene (PP) fibres instead
of steel wire meshes in concrete for tunnel lining are presented. The
laboratory research included testing the properties of different sorts and
shapes of PP fibres and one type od St. fibres, bond properties (pull-out
tests) of PP fibres form different concrete mixes. standard bending test of
concrete prisms and bending test of circular plates. With obtained
parameters the analyses of stresses and strains in supporting structure by
means of FLAC computer program were cinducted, for different stages of
construction, which included the interaction of primary layer with
reinforced rock. For the sake of comparison test fields on the site were
erected with PP fibres and steel reinforcing meshes.
Keywords: laboratory research, polypropylene (PP) fibre, st. fibres, circular plates
- Type of paper
: Paper in proceedings
Title: Contribution to the methodology for engineering-geological
and geotechnical modeling of dams
- Authors:
- Jašarević, Ibrahim (18195)
- Ivčić, D.
- Biondić, Božidar
Language: hrvatski
Place: Zagreb
Year: 1995
Summary: The signifience of engineering-geological and geotechnical
works was proven on the example of design and selection of dam type at HPP
Lešće and HPP Lučica. The importance of computer-aided program support is
being emphasised, since it enables statistical processing of numerous
recorded structural and tectonic elements. Integral engineering and
geological model has been derived according to the above elements recorded
on the terrain surface, in exploratory galleries and boreholes, and on the
basis of geophysical investigations, "in site" and laboratory tests.
Engineering classification of sigled out rocky blocks hs been carried put
and geotechnical model elaborated with selected geotechnical parameters
required for appropriate dam calculations.
The synthesis and analysis of previously performed eyplorations for HPP
Lešće was carried out by the application of engineering-geological and
geotechnical modelling on the basis of signgled out tectonic blocks and
according to "Q" and "RMR" classification. In this way, the asymmetry
coefficient of the dam profile on left and right river bank has been
determined (1:1.3 to 1:1.8). It significantly deviates from the previously
defined one, so that the solution differ as regards technical and economic
poind of view, i.e. instead of gravitational concrede dam - the arch dam.
Keywords: engineering-geological and geotechnical models, arch dam, asymmetry coefficient
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Mišćević, Predrag
- Jašarević, Ibrahim (18195)
- Editors
- Rossmanith, H.P.
Proceedings title: Proceedings of the second Intenbational Conference
Language: engleski
Place: Vienna, Austria
Year: 1995
Pages: from 633 to 638
Meeting: Mechanics of Jointed and Faulted Rock
Held: from 04/10/95 to 04/14/95
Summary: The ultimate bearing capacity of the footing, in layered
and jointed rock mass, significantly depends on the characteristics and
position of layers and joints. The paper analyzes this problem considering
the influence of thickness, position and orientation of a layer with
singificiant difference in characteristics (of deformation and shear
strength) from the main rock mass. The influence of joints between a layer
and mass, as a part of the analysis, is determined.The analysis is made for
strip surface footing, using numerical modelling. Calculations are erformed
simultaneously by two computer programs using the finite element method and
the finite difference method, with independent development of models. For
the iteration procedure used in the calculation, the influence of load
increase in stepping up on the determination of "local" and "Global"
failure for a "Week" layer in the "strong" rock mass, and a significant
increase for a "strong" layer in a "weak" mass.
Keywords: ultimate bearing capacity, footing, layered and jointed rock mass, numerical modelling.
- Type of paper
: Mentorship
Title: The effect of anizotropy on layered rock mass foundation
Faculty: Građevinski fakultet Sveučilišta u Zagrebu Sveučilište u Zagrebu
Date of defense: 04/22/93
Number of pages: 200
Author: Mišćević Predrag
Degree level: M.A.