engleski

Impact of Morphodynamical Changes on the Bridge Stability: Case Study of Jakuševac Bridge in Zagreb

Anthropogenic activities in the river channel and on the watershed can increase natural morphological processes. This can result in underestimation of long-term river bed changes. Bridge foundations in these rivers are particularly sensitive if the local scour is superimposed to the general scour process. Regular monitoring along the Sava River in Zagreb during the last 20 years showed that significant changes of the river bed have occurred. This paper gives results of the monitoring of the river bed changes around the Jakusevac Bridge piers. Description of morphological changes was based on the hydraulic and hydrographic surveys. Flow velocities and discharges were collected by using acoustic Doppler current profiler (ADCP), and bathymetry surveys by using multi-beam sonar. The importance of regular monitoring of the river channel degradation around bridges is stressed, especially were bridges instability may cause significant consequences.

bridge scour, railway bridge Sava Jakuševac, ADCP, multibeam

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