Notranje Gorice Noise study
The study’s subject is a comparative study of the railway noise burden with the proposal of alternative installing active noise protection variants (hereinafter referred to as anti-noise barriers) for the inner part of the settlement Notranje Gorice, near the main railway line no. 50 Ljubljana - Sežana - d. m., 576.540 km to 577.110 km.
Due to railway noise, a comparative noise load study for part of the Notranje Gorice settlement takes into account the existing state with no anti-noise protection, as well as analyses and proposes possible variants of installing anti-noise barriers with different lateral distances from the axis of the rail track, their heights and type of measures.
Noise levels at the facades of buildings were tested with the SOUNDPLAN 7.1 software, isophone charts for night-time when noise levels exceed the permissible value most were also prepared. The effects of individual variations in the vicinity of the railway line have been shown in cross sections, and we also presented charts with differences between the levels of certain versions.
Based on the results of the noise load analysis the following measures were proposed:
Low noise barrier with a total length of 1650.0 m and height of 0.7 m above the upper edge of the rail.
Rebuilding of fixtures in secure premises for 8 housings that could not be actively protected with the proposed anti-noise barrier.
Low noise barrier is often used as a solution in certain countries of the European Union, particularly in Germany.
A comparative variant showed that a larger part of railway can be adequately protected with lower costs.
By shortening the distance from the source of the noise and reducing the amount of noise protection, economically efficient noise levels, which correspond to the legally set limits for the greater part of the protected area, can be achieved. As is the practice in anti-noise barrier design, the most burdened facilities are additionally protected with a passive anti-noise protection.
Low noise barrier is economically and aesthetically more acceptable and appropriate. In the detailed planning it is necessary to define the conditions of construction and the system of performance, since the proposed solution affects the profile of the rail platform.