Abstract
The article presents the development and construction technology of the Municipal noise-absorbing screen (MNAS) – in Czech "Mestská protihluková clona" (MPHC). The Municipal noise-absorbing screen is a new acoustical element developed in cooperation of the Department of Railway Structures, Faculty of Civil Engineering, CTU in Prague and the Montstav CZ s.r.o. Company. It is characterised by very small dimensions – its height is only ca 0.3 metre above the top of rail. The element serves to attenuate the noise induced by rail traffic arising at the wheel-rail contact. The Municipal noise-absorbing screen consists of individual, mutually interlocked units, placed one after another, made of bound recycled rubber. The article describes the major limiting conditions for the placement, shape and execution of the Municipal noise-absorbing screen. It also describes the construction of the test section situated on a tram track in Prague and sums up the experience obtained after the first year of operation.
Highlights
The present-day requirements for admissible noise levels induced by both road and railway traffic in builtup residential areas have been increasingly growing
Low noise-absorbing screens are elements or building units placed along tram tracks, railway tracks or other rail guided transport systems whose application results in the reduction of undesirable effects of noise arising during the passage of rail traffic [2]
Tracks with an open track structure were considered of which the final choice fell on a tram track in Prague 4, direction Sídliště Modřany, the section Pobřežní cesta – Přístaviště in the Prague district of Braník
Summary
The present-day requirements for admissible noise levels induced by both road and railway traffic in builtup residential areas have been increasingly growing. Low noise-absorbing screens are elements or building units placed along tram tracks, railway tracks or other rail guided transport systems whose application results in the reduction of undesirable effects of noise arising during the passage of rail traffic [2]. Low noiseabsorbing screens are placed as close as possible to the structure gauge set by a technical standard Thanks to their dimensions, they can be installed much closer to the source of noise as compared to classic noise barriers being able to attenuate the dominant noise arising at the wheel-rail contact (rolling noise) and the bogie noise [4, 5]. Depending on the material from which they are produced, they can have absorption or reflection properties
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