Zeljko Arbanas | University of Rijeka (original) (raw)

Papers by Zeljko Arbanas

Research paper thumbnail of Landslide Dynamics: ISDR-ICL Landslide Interactive Teaching Tools (LITT)

Research paper thumbnail of Using of Observational Methods Durnig Designing and Constructing of Open Pits in Rock Mass in Urban Areas

Osnovna razlika u konstrukcijama pri izvedbi iskopa za građevne jame i podzemne otvore u tlu i st... more Osnovna razlika u konstrukcijama pri izvedbi iskopa za građevne jame i podzemne otvore u tlu i stijenskoj masi sastoji se u elementima podgradne konstrukcije. Dok je u tlu podgradna konstrukcija od odabranih inženjerskih materijala osnovni nosivi element, u stijenskom materijalu osnovni inženjerski materijal predstavlja in situ stijenska masa s relativno ogranicenim mogucnostima za njezino poboljsanje ili ojacanje. Pri izvedbi iskopa građevnih jama i podzemnih otvora u stijeni, stijenska masa predstavlja osnovni element podgradne konstrukcije, s obzirom da preraspodjelom naprezanja unutar stijenske mase ista „nosi samu sebe“. Pri tome je kvaliteta stijenske mase predodređena in situ uvjetima, koji su daleko od kontroliranih, a zbog heterogenosti i sustava diskontinuiteta stijenska masa se u pravilu rijetko ponasa kao kvazikontinuum. Osnove projektiranja u inženjerstvu u stijenskoj masi definirao je Bieniawski kao principe koji usmjeravaju proces projektiranja i izvedbe konstrukcija u stijenskoj masi. Na osnovi navedenih principa razvijena je vecina projektnih metodologija za konstrukcije u stijenskoj masi, a projektni princip o potrebnoj optimizaciji ukazuje na potrebu koristenja opservacijske metode i interaktivnog projektiranja konstrukcija u stijenskoj masi. Opisati ce se nacin određivanja parametara cvrstoce i deformabilnosti stijenske mase u skladu s empirijskim kriterijima cvrstoce i deformabilnosti stijenske mase prema opceprihvacenim klasifikacijama stijenske mase. Obrazložiti ce se principi opservacijske metode u inženjerstvu u mehanici stijena, kao i sustav interaktivnog projektiranja prema Eurocode 7 (EC7) na recentnim primjerima u hrvatskom graditeljstvu.

Research paper thumbnail of Remedial Measures Impact on Slope Stability and Landslide Occurrence in Small-Scale Slope Physical Model in 1 g Conditions

Research paper thumbnail of Stereoscopic analysis of landsides on the southern slopes of the Mt. Medvednica and landslide features assessment – examples and field check

The term landslide comprises almost all varieties of mass movements on slopes. Landslide inventor... more The term landslide comprises almost all varieties of mass movements on slopes. Landslide inventory contains data about landslides on certain area. Landslide inventory map shows the locations of the landslides and can contain other additional data. Landslide maps can be prepared using different techniques. Landslide inventory maps are usually used in determination of landslide mitigation measures, civil engineering and urban planning. Spatial distribution of landslides and their activity is subject of change during time and that is a reason for development of landslide inventory maps from different periods (can be done by stereoscopic analysis of photographs from different periods). Data in landslide inventory is one of the most basic and most needed in further analysis in landslide susceptibility, landslide hazard and landslide risk. Most widespread and most used method in landslide inventory development is geomorphological mapping of terrain and usage of different methods of remote sensing (for example stereoscopic analysis). Even today, use and stereoscopic analysis of aerial photography has defined a prevailing standard and a benchmark against which new technologies to detect and map landslides are compared. Analytic hierarchy process (AHP) is a structural technique for data organization and analysis used for obtaining complex decisions. AHP can be used practically in landslide mapping and assessment of characteristic landslide features. Stereoscopic analysis was used in combination with AHP methodology for the assessment of characteristic landslide features on the southern slopes of the Mt. Medvednica. Assessment of characteristic landslide features for the identified landslides was based on the visible landslide features on photography (stereoscopic analysis), which included assessment of: landslide features (features at landslide body, features of landslide body boundary and features at main scarp) and features at landslide body toe part, slope morphology and land cover. Identified landslides were classified based on visible landslide features and according AHP score. Investigation encompassed: (i) criteria development for application of AHP methodology in area of research (100 km2), (ii) interpretation of 130 aerial photos of two generations, (iii) landslide inventory development and preparation of landslide inventory map and (iv) methodology verification on the basis of comparison with existing data and field check. In the paper some characteristic examples of identified landsides on the southern slopes of the Mt. Medvednica determined by stereoscopic analysis are given, with AHP score and field report. The methodology presented in this paper (stereoscopic analysis in combination with AHP methodology), is used for the first time in Croatia in landslide inventory development and preparation of landslide inventory map. Also the methodology and the established criteria is applicable in landslide inventory development and preparation of landslide inventory map in other areas where landslides exists in same or similar conditions, in Croatia or worldwide. Since there is no uniform landslide inventory for the whole territory of Croatia, the used methodology and the developed criteria also can be used as guidelines for the usage of remote sensing in landslide inventory development on national level.

Research paper thumbnail of Use of Remotely Piloted Aircraft System (RPAS) in the analysis of historical landslide occurred in 1885 in the Rječina River Valley, Croatia

The EGU General Assembly, 2016

Research paper thumbnail of Landslides

IGI Global eBooks, 2015

Landslide research is an interdisciplinary field that primarily encompasses scientists from geomo... more Landslide research is an interdisciplinary field that primarily encompasses scientists from geomorphology, engineering geology, and geotechnical engineering in collaboration with researchers from such fields as geodesy, hydrogeology, geophysics, and many others. This chapter is intended as a resource for researchers interested in landslide engineering and landslide science to acquire a summarized review of research subjects and the state-of-the-art literature. A wide range of landslide topics are presented in the following sections: landslide mapping, landslide investigation, landslide monitoring, landslide hazard and risk assessment, and landslide stabilization and remediation measures. The results of landslide studies have practical applications to society via the avoidance, prevention, and mitigation of landslide hazards and risks. Landslide avoidance and prevention are the primary interests for land-use policies based on landslide mapping, followed by the prediction of landslide processes and their consequences. Landslide mitigation includes the development of engineering technologies for landslide investigation, monitoring, and remediation.

Research paper thumbnail of Landslide Mapping Based on UAV Photogrammetry Using SfM—The Prnjavor Čuntićki Landslide Case Study, Croatia

Springer eBooks, Dec 23, 2020

Research paper thumbnail of TXT-tool 3.385-1.3: Landslide Occurrence Prediction in the Rječina River Valley as a Base for an Early Warning System

Springer eBooks, 2018

This paper presents deterministic 3D stability analyses using LS-Rapid software applied to the wi... more This paper presents deterministic 3D stability analyses using LS-Rapid software applied to the wider area of the Grohovo landslide on the north-eastern slope of the Rjecina River Valley near the city of Rijeka, Croatia. Results of these analyses, in combination with results of existing monitoring data, are necessary for predicting future landslide behavior as a base for establishing an early warning system at the Grohovo landslide.

Research paper thumbnail of Complex Landslide in the Rječina Valley

Rudarsko-geološko-naftni zbornik, 1999

U radu su prikazani rezultati istraživanja prve faze složenog klizista na sjeveroistocnoj padini ... more U radu su prikazani rezultati istraživanja prve faze složenog klizista na sjeveroistocnoj padini doline Rjecine između brane Valici i naselja Pasac. Bokovi doline oblikovani su u paleogenskom flisu i kvartarnim padinskim tvorevinama. Na vrhovima su zastupljene vapnenacke stijene tvoreci litice. Nastanak istražene kompleksne pojave klizista predodređen je geoloskom građom i morfogenezom doline Rjecine. To je složeno retrogresivno kliziste, koje se pocelo razvijati od stope prema vrhu kosine. Na padini je otkriveno 13 pojedinacnih kliznih tijela. Klizanjem je zahvacen materijal padinskih tvorevina i dio kore fizicko-kemijskog raspadanja. Veci dio kliznog tijela saturiran je podzemnom vodom koja se procjeđuje kroz pokrivac po kontaktu s nepropusnom flisnom podlogom. Klizanje je relativno plitko buduci da u hidrotehnickom tunelu, koji se nalazi ispod nožice klizista, nisu uocena ostecenja prouzrocena klizanjem. Pokrenuti su i megablokovi vapenacke stijene koji, najvjerojatnije, klize po flisnoj podlozi. To je posebna je pojava, netipicna za klizista na flisnim padinama u siroj okolici Rijeke. Vapnenacka stijena na litici je jako dezintegrirana, a u njoj su vidljive svježe pukotine. Istraživanja su se sastojala od geodetskih mjerenja, geofizickih, inženjerskogeoloskih i geotehnickih istraživanja. Geodetsko snimanje obavljeno je metodom teresticke fotogrametrije. Rezultati su uspoređeni s aero snimcima ucinjenim godine 1981. Tako su se mogle otkriti promjene morfologije padine u razdoblju od 1981. do 1997. godine. Fotoskice su koristene i za dopunu inženjerskogeoloskog kartiranja. Geofizicko mjerenje je obavljena metodom plitkog seizmicko-refrakcijskog profiliranja.

Research paper thumbnail of Continuous monitoring of the Kostanjek landslide

Research paper thumbnail of Landslide hazard analysis in national-scale for landslide risk assessment in Croatia

Research paper thumbnail of Development of physical model of landslide remedial constructions’ behaviour

Research paper thumbnail of Landslide risk management in Croatia: Current state

Research paper thumbnail of Monitoring klizišta u urbaniziranim sredinama na primjeru klizišta Kostanjek u Zagrebu, Hrvatska

Research paper thumbnail of Preliminary rockfall susceptibility assessment of the rock slopes above the Town of Omiš (Croatia)

The aim of this paper is to present preliminary rockfall susceptibility assessment based on remot... more The aim of this paper is to present preliminary rockfall susceptibility assessment based on remote sensing and automated kinematic analysis for the steep slopes above the Town of Omis. Collection of spatial data was performed by terrestrial laser scanning and unmanned aircraft vehicle to derivate high-resolution point cloud models. Split-FX and CloudCompare software were used to extract discontinuity surfaces and to determine their orientation. Automated spatial kinematic analysis was performed for each polygon of slope surface model in order to identify locations of possible instability mechanism. From the results of the spatial kinematic analysis and with the calculation of Kinematic Hazard Index, the most critical parts on the slopes for the occurrence of possible instability mechanisms were identified. Resulting rockfall susceptible areas, unstable blocks and probable instability mechanisms on the investigated slopes provide the input data that can be used to determine critical areas for further deterministic slope stability analysis, as well as for rockfall hazard and risk assessment.

Research paper thumbnail of Construction of open pits in Hotel center New resort in Novi Vinodolski

U tijeku je dogradnja i prosirenje luksuznog turistickog naselja „ Novi Resort“ u Novom Vinodolsk... more U tijeku je dogradnja i prosirenje luksuznog turistickog naselja „ Novi Resort“ u Novom Vinodolskom, Hrvatska. Za potrebe izgradnje nekoliko vecih građevina (sredisnji hotelski objekt, wellness centar, sportska dvorana, viseetažna garažna građevina i pomocna građevina), a zbog morfologije terena, bilo je nužno izvesti zasijecanje i ukopavanje dijela građevina. Zbog ogranicenosti i optimalnog koristenja prostora, iskop građevnih jama je izveden vertikalno, visine od 12.0 m do 20.0 m, a zasjeke u stijenskoj masi bilo je nužno ojacati kako bi se osigurala njihova stabilnost. Provedenim istražnim radovima ustanovljeno je da je lokacija izgrađena od relativno tankog pokrivaca i stijenske podloge, vapnenaca gornje krede. Vapnenci su kristalaste strukture, svjetlosive do bijele boje, neuslojeni ili gromadasti do debelo uslojeni, mjestimicno brecoliki. Stijenska masa je razlicito raspucana i okrsena, intenzivnije unutar povrsinskog sloja, a unutar vapnenaca su ustanovljena i podrucja degradiranog flisa. Za potrebe osiguranja stabilnost stijenskih zasjeka građevnih jama bilo je nužno izvesti ojacanje stijenske mase stapnim sidrima i mlaznim betonom. Kroz izvedene podgradne sustave od mlaznog betona izvedene su procjednice radi eliminacije moguce pojave hidrostatickog pritiska. U radu se daje pregled izvedenih podgradnih sustava za osiguranja stabilnosti zidova za pet vecih građevnih jama u okviru turistickog naselja. Opisuju se inženjerskogeoloske znacajke pojedinih lokacija, daje se primjer provedenih analiza stabilnosti ojacanih zidova jama, kao i detalji i opisi primijenjenih tehnickih rjesenja osiguranja stabilnosti zasjeka.

Research paper thumbnail of Landslide monitoring system: Case study of the Kostanjek Landslide, Croatia

U radu se prikazuje integrirani sustav monitoringa klizista Kostanjek u Zagrebu. Sveobuhvatni int... more U radu se prikazuje integrirani sustav monitoringa klizista Kostanjek u Zagrebu. Sveobuhvatni integrirani sustav monitoringa u realnom vremenu razvija se u okviru istraživackih aktivnosti znanstvenog hrvatsko-japanskog bilateralnog projekta, a od 2011. godine u tijeku je instalacija sustava. Sustav monitoringa ce se sastojati od vise od 40 senzora za geodetska, hidroloska i geotehnicka opažanja. Oprema za pracenje klizista na povrsini i u podzemlju ukljucuje 15 preciznih GNSS prijemnika, žicane ekstenzometre kratkog i dugackog raspona, piezometre sa senzorima za mjerenje pornog tlaka u busotinama, senzore za mjerenje hidrostatickih pritisaka u bunarima, kisomjer, meteorolosku stanicu i akcelerometre namijenjene za pracenje inicijatora klizanja. Sva opažacka oprema ce biti povezana u jedinstveni sustav s kontinuiranim pracenjem i prijenosom podataka u sredisnju arhivu podataka. Zavrsetak instalacije sustava planiran je u 2013. godini.

Research paper thumbnail of Identification and Mapping of the Valići Lake Landslide (Primorsko-Goranska County, Croatia)

The paper presents results of identification and mapping of the Valici Lake landslide reactivated... more The paper presents results of identification and mapping of the Valici Lake landslide reactivated in February 2014 due to intensive rainfalls. The described investigations included conventional engineering geological field mapping and innovative remote sensing mapping using high resolution digital elevation model, undertaken for interpretation of landslide mechanism. The research results imply reactivation of large part of old deep landslide (>30%) and high risk due to potential damaging of the reservoir and the dam.

Research paper thumbnail of Landslides Remedial Works on the Roads in Istria

U radu se prikazuju tipicne pojave nestabilnosti koje se javljaju na starim na prometnicama polož... more U radu se prikazuju tipicne pojave nestabilnosti koje se javljaju na starim na prometnicama položenim na flisu na podrucju Istre. Naslage flisa predstavljaju sredinu izuzetno heterogenih geotehnickih znacajki pri cemu veci dio kompleksa predstavljaju meke stijene podložne djelovanju atmosferilija. U dugotrajnim procesima uslijed promjena uvjeta na pojedinim lokacijama, a nepovoljnim hidroloskim prilikama dolazi do pojava nestabilnosti i ostecenja prometnica. Nestabilnosti se javljaju u pravilu u vidu odrona i manjih klizista, a zahvati na sanaciji su složeni i skupi.

Research paper thumbnail of The protection of beaches in the area of Kvarner (Croatia)

Na hrvatskoj obali Jadranskog mora prirodna sljunkovita i pjeskovita žala su rijetka. Slicna je s... more Na hrvatskoj obali Jadranskog mora prirodna sljunkovita i pjeskovita žala su rijetka. Slicna je situacija i na podrucju Kvarnera...

Research paper thumbnail of Landslide Dynamics: ISDR-ICL Landslide Interactive Teaching Tools (LITT)

Research paper thumbnail of Using of Observational Methods Durnig Designing and Constructing of Open Pits in Rock Mass in Urban Areas

Osnovna razlika u konstrukcijama pri izvedbi iskopa za građevne jame i podzemne otvore u tlu i st... more Osnovna razlika u konstrukcijama pri izvedbi iskopa za građevne jame i podzemne otvore u tlu i stijenskoj masi sastoji se u elementima podgradne konstrukcije. Dok je u tlu podgradna konstrukcija od odabranih inženjerskih materijala osnovni nosivi element, u stijenskom materijalu osnovni inženjerski materijal predstavlja in situ stijenska masa s relativno ogranicenim mogucnostima za njezino poboljsanje ili ojacanje. Pri izvedbi iskopa građevnih jama i podzemnih otvora u stijeni, stijenska masa predstavlja osnovni element podgradne konstrukcije, s obzirom da preraspodjelom naprezanja unutar stijenske mase ista „nosi samu sebe“. Pri tome je kvaliteta stijenske mase predodređena in situ uvjetima, koji su daleko od kontroliranih, a zbog heterogenosti i sustava diskontinuiteta stijenska masa se u pravilu rijetko ponasa kao kvazikontinuum. Osnove projektiranja u inženjerstvu u stijenskoj masi definirao je Bieniawski kao principe koji usmjeravaju proces projektiranja i izvedbe konstrukcija u stijenskoj masi. Na osnovi navedenih principa razvijena je vecina projektnih metodologija za konstrukcije u stijenskoj masi, a projektni princip o potrebnoj optimizaciji ukazuje na potrebu koristenja opservacijske metode i interaktivnog projektiranja konstrukcija u stijenskoj masi. Opisati ce se nacin određivanja parametara cvrstoce i deformabilnosti stijenske mase u skladu s empirijskim kriterijima cvrstoce i deformabilnosti stijenske mase prema opceprihvacenim klasifikacijama stijenske mase. Obrazložiti ce se principi opservacijske metode u inženjerstvu u mehanici stijena, kao i sustav interaktivnog projektiranja prema Eurocode 7 (EC7) na recentnim primjerima u hrvatskom graditeljstvu.

Research paper thumbnail of Remedial Measures Impact on Slope Stability and Landslide Occurrence in Small-Scale Slope Physical Model in 1 g Conditions

Research paper thumbnail of Stereoscopic analysis of landsides on the southern slopes of the Mt. Medvednica and landslide features assessment – examples and field check

The term landslide comprises almost all varieties of mass movements on slopes. Landslide inventor... more The term landslide comprises almost all varieties of mass movements on slopes. Landslide inventory contains data about landslides on certain area. Landslide inventory map shows the locations of the landslides and can contain other additional data. Landslide maps can be prepared using different techniques. Landslide inventory maps are usually used in determination of landslide mitigation measures, civil engineering and urban planning. Spatial distribution of landslides and their activity is subject of change during time and that is a reason for development of landslide inventory maps from different periods (can be done by stereoscopic analysis of photographs from different periods). Data in landslide inventory is one of the most basic and most needed in further analysis in landslide susceptibility, landslide hazard and landslide risk. Most widespread and most used method in landslide inventory development is geomorphological mapping of terrain and usage of different methods of remote sensing (for example stereoscopic analysis). Even today, use and stereoscopic analysis of aerial photography has defined a prevailing standard and a benchmark against which new technologies to detect and map landslides are compared. Analytic hierarchy process (AHP) is a structural technique for data organization and analysis used for obtaining complex decisions. AHP can be used practically in landslide mapping and assessment of characteristic landslide features. Stereoscopic analysis was used in combination with AHP methodology for the assessment of characteristic landslide features on the southern slopes of the Mt. Medvednica. Assessment of characteristic landslide features for the identified landslides was based on the visible landslide features on photography (stereoscopic analysis), which included assessment of: landslide features (features at landslide body, features of landslide body boundary and features at main scarp) and features at landslide body toe part, slope morphology and land cover. Identified landslides were classified based on visible landslide features and according AHP score. Investigation encompassed: (i) criteria development for application of AHP methodology in area of research (100 km2), (ii) interpretation of 130 aerial photos of two generations, (iii) landslide inventory development and preparation of landslide inventory map and (iv) methodology verification on the basis of comparison with existing data and field check. In the paper some characteristic examples of identified landsides on the southern slopes of the Mt. Medvednica determined by stereoscopic analysis are given, with AHP score and field report. The methodology presented in this paper (stereoscopic analysis in combination with AHP methodology), is used for the first time in Croatia in landslide inventory development and preparation of landslide inventory map. Also the methodology and the established criteria is applicable in landslide inventory development and preparation of landslide inventory map in other areas where landslides exists in same or similar conditions, in Croatia or worldwide. Since there is no uniform landslide inventory for the whole territory of Croatia, the used methodology and the developed criteria also can be used as guidelines for the usage of remote sensing in landslide inventory development on national level.

Research paper thumbnail of Use of Remotely Piloted Aircraft System (RPAS) in the analysis of historical landslide occurred in 1885 in the Rječina River Valley, Croatia

The EGU General Assembly, 2016

Research paper thumbnail of Landslides

IGI Global eBooks, 2015

Landslide research is an interdisciplinary field that primarily encompasses scientists from geomo... more Landslide research is an interdisciplinary field that primarily encompasses scientists from geomorphology, engineering geology, and geotechnical engineering in collaboration with researchers from such fields as geodesy, hydrogeology, geophysics, and many others. This chapter is intended as a resource for researchers interested in landslide engineering and landslide science to acquire a summarized review of research subjects and the state-of-the-art literature. A wide range of landslide topics are presented in the following sections: landslide mapping, landslide investigation, landslide monitoring, landslide hazard and risk assessment, and landslide stabilization and remediation measures. The results of landslide studies have practical applications to society via the avoidance, prevention, and mitigation of landslide hazards and risks. Landslide avoidance and prevention are the primary interests for land-use policies based on landslide mapping, followed by the prediction of landslide processes and their consequences. Landslide mitigation includes the development of engineering technologies for landslide investigation, monitoring, and remediation.

Research paper thumbnail of Landslide Mapping Based on UAV Photogrammetry Using SfM—The Prnjavor Čuntićki Landslide Case Study, Croatia

Springer eBooks, Dec 23, 2020

Research paper thumbnail of TXT-tool 3.385-1.3: Landslide Occurrence Prediction in the Rječina River Valley as a Base for an Early Warning System

Springer eBooks, 2018

This paper presents deterministic 3D stability analyses using LS-Rapid software applied to the wi... more This paper presents deterministic 3D stability analyses using LS-Rapid software applied to the wider area of the Grohovo landslide on the north-eastern slope of the Rjecina River Valley near the city of Rijeka, Croatia. Results of these analyses, in combination with results of existing monitoring data, are necessary for predicting future landslide behavior as a base for establishing an early warning system at the Grohovo landslide.

Research paper thumbnail of Complex Landslide in the Rječina Valley

Rudarsko-geološko-naftni zbornik, 1999

U radu su prikazani rezultati istraživanja prve faze složenog klizista na sjeveroistocnoj padini ... more U radu su prikazani rezultati istraživanja prve faze složenog klizista na sjeveroistocnoj padini doline Rjecine između brane Valici i naselja Pasac. Bokovi doline oblikovani su u paleogenskom flisu i kvartarnim padinskim tvorevinama. Na vrhovima su zastupljene vapnenacke stijene tvoreci litice. Nastanak istražene kompleksne pojave klizista predodređen je geoloskom građom i morfogenezom doline Rjecine. To je složeno retrogresivno kliziste, koje se pocelo razvijati od stope prema vrhu kosine. Na padini je otkriveno 13 pojedinacnih kliznih tijela. Klizanjem je zahvacen materijal padinskih tvorevina i dio kore fizicko-kemijskog raspadanja. Veci dio kliznog tijela saturiran je podzemnom vodom koja se procjeđuje kroz pokrivac po kontaktu s nepropusnom flisnom podlogom. Klizanje je relativno plitko buduci da u hidrotehnickom tunelu, koji se nalazi ispod nožice klizista, nisu uocena ostecenja prouzrocena klizanjem. Pokrenuti su i megablokovi vapenacke stijene koji, najvjerojatnije, klize po flisnoj podlozi. To je posebna je pojava, netipicna za klizista na flisnim padinama u siroj okolici Rijeke. Vapnenacka stijena na litici je jako dezintegrirana, a u njoj su vidljive svježe pukotine. Istraživanja su se sastojala od geodetskih mjerenja, geofizickih, inženjerskogeoloskih i geotehnickih istraživanja. Geodetsko snimanje obavljeno je metodom teresticke fotogrametrije. Rezultati su uspoređeni s aero snimcima ucinjenim godine 1981. Tako su se mogle otkriti promjene morfologije padine u razdoblju od 1981. do 1997. godine. Fotoskice su koristene i za dopunu inženjerskogeoloskog kartiranja. Geofizicko mjerenje je obavljena metodom plitkog seizmicko-refrakcijskog profiliranja.

Research paper thumbnail of Continuous monitoring of the Kostanjek landslide

Research paper thumbnail of Landslide hazard analysis in national-scale for landslide risk assessment in Croatia

Research paper thumbnail of Development of physical model of landslide remedial constructions’ behaviour

Research paper thumbnail of Landslide risk management in Croatia: Current state

Research paper thumbnail of Monitoring klizišta u urbaniziranim sredinama na primjeru klizišta Kostanjek u Zagrebu, Hrvatska

Research paper thumbnail of Preliminary rockfall susceptibility assessment of the rock slopes above the Town of Omiš (Croatia)

The aim of this paper is to present preliminary rockfall susceptibility assessment based on remot... more The aim of this paper is to present preliminary rockfall susceptibility assessment based on remote sensing and automated kinematic analysis for the steep slopes above the Town of Omis. Collection of spatial data was performed by terrestrial laser scanning and unmanned aircraft vehicle to derivate high-resolution point cloud models. Split-FX and CloudCompare software were used to extract discontinuity surfaces and to determine their orientation. Automated spatial kinematic analysis was performed for each polygon of slope surface model in order to identify locations of possible instability mechanism. From the results of the spatial kinematic analysis and with the calculation of Kinematic Hazard Index, the most critical parts on the slopes for the occurrence of possible instability mechanisms were identified. Resulting rockfall susceptible areas, unstable blocks and probable instability mechanisms on the investigated slopes provide the input data that can be used to determine critical areas for further deterministic slope stability analysis, as well as for rockfall hazard and risk assessment.

Research paper thumbnail of Construction of open pits in Hotel center New resort in Novi Vinodolski

U tijeku je dogradnja i prosirenje luksuznog turistickog naselja „ Novi Resort“ u Novom Vinodolsk... more U tijeku je dogradnja i prosirenje luksuznog turistickog naselja „ Novi Resort“ u Novom Vinodolskom, Hrvatska. Za potrebe izgradnje nekoliko vecih građevina (sredisnji hotelski objekt, wellness centar, sportska dvorana, viseetažna garažna građevina i pomocna građevina), a zbog morfologije terena, bilo je nužno izvesti zasijecanje i ukopavanje dijela građevina. Zbog ogranicenosti i optimalnog koristenja prostora, iskop građevnih jama je izveden vertikalno, visine od 12.0 m do 20.0 m, a zasjeke u stijenskoj masi bilo je nužno ojacati kako bi se osigurala njihova stabilnost. Provedenim istražnim radovima ustanovljeno je da je lokacija izgrađena od relativno tankog pokrivaca i stijenske podloge, vapnenaca gornje krede. Vapnenci su kristalaste strukture, svjetlosive do bijele boje, neuslojeni ili gromadasti do debelo uslojeni, mjestimicno brecoliki. Stijenska masa je razlicito raspucana i okrsena, intenzivnije unutar povrsinskog sloja, a unutar vapnenaca su ustanovljena i podrucja degradiranog flisa. Za potrebe osiguranja stabilnost stijenskih zasjeka građevnih jama bilo je nužno izvesti ojacanje stijenske mase stapnim sidrima i mlaznim betonom. Kroz izvedene podgradne sustave od mlaznog betona izvedene su procjednice radi eliminacije moguce pojave hidrostatickog pritiska. U radu se daje pregled izvedenih podgradnih sustava za osiguranja stabilnosti zidova za pet vecih građevnih jama u okviru turistickog naselja. Opisuju se inženjerskogeoloske znacajke pojedinih lokacija, daje se primjer provedenih analiza stabilnosti ojacanih zidova jama, kao i detalji i opisi primijenjenih tehnickih rjesenja osiguranja stabilnosti zasjeka.

Research paper thumbnail of Landslide monitoring system: Case study of the Kostanjek Landslide, Croatia

U radu se prikazuje integrirani sustav monitoringa klizista Kostanjek u Zagrebu. Sveobuhvatni int... more U radu se prikazuje integrirani sustav monitoringa klizista Kostanjek u Zagrebu. Sveobuhvatni integrirani sustav monitoringa u realnom vremenu razvija se u okviru istraživackih aktivnosti znanstvenog hrvatsko-japanskog bilateralnog projekta, a od 2011. godine u tijeku je instalacija sustava. Sustav monitoringa ce se sastojati od vise od 40 senzora za geodetska, hidroloska i geotehnicka opažanja. Oprema za pracenje klizista na povrsini i u podzemlju ukljucuje 15 preciznih GNSS prijemnika, žicane ekstenzometre kratkog i dugackog raspona, piezometre sa senzorima za mjerenje pornog tlaka u busotinama, senzore za mjerenje hidrostatickih pritisaka u bunarima, kisomjer, meteorolosku stanicu i akcelerometre namijenjene za pracenje inicijatora klizanja. Sva opažacka oprema ce biti povezana u jedinstveni sustav s kontinuiranim pracenjem i prijenosom podataka u sredisnju arhivu podataka. Zavrsetak instalacije sustava planiran je u 2013. godini.

Research paper thumbnail of Identification and Mapping of the Valići Lake Landslide (Primorsko-Goranska County, Croatia)

The paper presents results of identification and mapping of the Valici Lake landslide reactivated... more The paper presents results of identification and mapping of the Valici Lake landslide reactivated in February 2014 due to intensive rainfalls. The described investigations included conventional engineering geological field mapping and innovative remote sensing mapping using high resolution digital elevation model, undertaken for interpretation of landslide mechanism. The research results imply reactivation of large part of old deep landslide (>30%) and high risk due to potential damaging of the reservoir and the dam.

Research paper thumbnail of Landslides Remedial Works on the Roads in Istria

U radu se prikazuju tipicne pojave nestabilnosti koje se javljaju na starim na prometnicama polož... more U radu se prikazuju tipicne pojave nestabilnosti koje se javljaju na starim na prometnicama položenim na flisu na podrucju Istre. Naslage flisa predstavljaju sredinu izuzetno heterogenih geotehnickih znacajki pri cemu veci dio kompleksa predstavljaju meke stijene podložne djelovanju atmosferilija. U dugotrajnim procesima uslijed promjena uvjeta na pojedinim lokacijama, a nepovoljnim hidroloskim prilikama dolazi do pojava nestabilnosti i ostecenja prometnica. Nestabilnosti se javljaju u pravilu u vidu odrona i manjih klizista, a zahvati na sanaciji su složeni i skupi.

Research paper thumbnail of The protection of beaches in the area of Kvarner (Croatia)

Na hrvatskoj obali Jadranskog mora prirodna sljunkovita i pjeskovita žala su rijetka. Slicna je s... more Na hrvatskoj obali Jadranskog mora prirodna sljunkovita i pjeskovita žala su rijetka. Slicna je situacija i na podrucju Kvarnera...