Author(s): Nagy Daniel Szilveszter, Bite Maria Dr.
Hungary’s busiest railway bridge is in Budapest. Currently, the construction speed of the railway bridge is 80 km / h, however, due to the state of the bridges a speed limit of 40 km / h is in force. On the planned railway bridges, this will be upgraded for passenger trains up to 100 km / h, and for freight trains up to 80 km / h.\nSince the planned investment affects Budapest’s buildings of especial acoustic value, we have developed a test and planning method that ensures that the current noise and vibration status of both Palace of Arts (MÜPA) and the National Theatre does not change.\nWe based our planning of noise and vibration protection on the concept that a similar construction as a Tisza railway bridge in Szolnok is planned to be built. At this bridge EdilonCorkelast® (Edilon ERS) continuous supported track fixation was used. Surrounding material of the rails is Edilon)(SedraCorkelast VA 60 flexible embedding compound. Trackelast 3000 flexible rail seat pad has been fitted under the rail base.\nThe planned bridge and the bridge in Szolnok will differ in the thickness and height of the plates. At the present railway bridge, we developed a special test method with more measurement points. So, we investigated the current noise and vibration emission, propagation conditions and imission.\nWe performed tests to determine radiating noise and vibration emissions for the planned bridge on the railway bridge in Szolnok as it has a similar structure to the planned one. The structural changes were taken into account during the calculations. Using the results obtained, noise maps suitable for tracking the radiation of the bridge were elaborated to determine the expected noise level and transfer functions for the expected vibration levels. Based on this, we have prepared the noise and vibration protection action plan for the bridge planning.\n
Name: Mr Daniel Szilveszter Nagy