Naslov
Monitoring of river channel morphodynamical changes in the zone of bridge piers

Autori
Kuspilić, Neven ; Bekić, Damir ; Gilja, Gordon ; McKeogh, Eamon

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the First International Conference on Road and Rail Infrastructure (CETRA 2010) / Lakušić, Stjepan - Zagreb : Građevinski fakultet Sveučilišta u Zagrebu, 2010

ISBN
978-953-6272-37-2

Skup
1st International Conference on Road and Rail Infrastructure (CETRA 2010)

Mjesto i datum
Opatija, Hrvatska, 17.05.2010. - 18.05.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
bridge scour ; weir ; railway ; ADCP ; multibeam

Sažetak
Waterways that flow under bridge crossings are subject to changes in channel geometry on a regular basis. The scale of the changes can sometimes overwhelm estimated changes in the design process. The most usual concerns in relation to bridge design are ; bearing capacity and the durability of the bridge construction and foundations, the optimum route or line of the bridge and other parameters regarding the safe construction, while the detrimental effects of water flow are sometimes neglected. This paper places particular emphasis on the problems of morphodynamical changes of the river channel in the immediate vicinity of the bridge piers. The theoretical background to the process of global and local river-bed erosion is initially presented. This is followed by an overview of new technologies for the survey of hydraulic and river channel changes in the area of interaction of river flow, sediment routing and bridge piers. The method of Acoustic Doppler Current Profiling (ADCP) for hydraulic surveys together with the methodology of hydrographic surveying using specialized multi-beam sonar are presented. Two case studies of hydraulic surveys and bridge scour analyses are presented. The fist study shows the deterioration of stability of Jakuševac bridge piers in Croatia due to significant river bed changes during a 20 year period. The second study shows collapse of the Malahide viaduct in Ireland due to the bridge pier stability problem and the subsequent remedial action on the bridge construction repair. Finally, a critical review of current engineering practice is given. The importance of giving more attention to the problem of constant river channel degradation is stressed, especially for locations were the degradation process may cause significant material damages or even death or injury of the general public.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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