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    Classification of highway noise barrier

    2021-01-20 13:10:26
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    The sound barrier of expressway is mainly composed of steel column and sound absorption and isolation panel. The column is the primary stress component of the sound barrier, which is fixed on the road anti-collision wall or embedded steel plate beside the track by bolts or welding; The sound absorption and insulation board is the primary sound insulation and absorption component, which is fixed in the H-shaped column slot by high-strength safety clips to form the highway sound barrier.


    The shape of highway noise barrier column can be divided into arc column, corner column, vertical column, etc. the shape of noise barrier column can be customized according to customer demand or drawing request. The column of sound barrier is made of H-shaped steel. The common models of H-shaped steel column are 100 * 100, 125 * 125, 150 * 150, etc. the height of column of sound barrier is determined by the standard height of sound barrier. Flange plates are generally 250 * 250 * 10mm, 300 * 300 * 10mm, 350 * 350 * 10mm, 400 * 400 * 10mm, etc.


    There are four common types of highway noise barriers: resistive noise barrier, general transparent noise barrier, microplate transparent noise barrier and composite noise barrier.


    1. The resistive sound insulation barrier consists of a front plate, a back plate and a side plate, which forms a closed box structure and a modular unit. The front plate is galvanized steel with a perforation rate of 25%, and the back plate and side plate are non perforated galvanized steel (from a beautiful point of view, color steel can also be used). A moisture-proof centrifugal glass wool board is filled between the two boards, and the sound absorption data is covered with a polyfluoroethylene film. The column is made of 12 # I-steel with a distance of 2m. The column is inserted into the reinforced concrete foundation. It is very troublesome to insert the standard plate between I-beams and fix it with fasteners.


    2. General transparent sound insulation barrier general transparent sound insulation barrier uses transparent polycarbonate board (also known as PC board), so transparent, sound insulation barrier has better landscape feeling, and is easier to dissolve into the surrounding environment than. Colors are available.


    3. Microporous plate transparent sound insulation barrier microporous plate transparent sound insulation barrier has two layers. It applies the principle of microporous sound absorption. On one layer of polycarbonate plate, there are many holes with a diameter of 0.8 mm, and the perforation rate is 1%. On the other layer of polycarbonate plate, there is no perforation, and the distance between the two layers is 100 mm. It is equivalent to a single-layer microporous sound absorption structure, which deals with the opposition between sound absorption and transparent. Due to the effect of sound waves, the pores are not blocked by dust. 4、 Composite sound insulation barrier composite sound insulation barrier has the advantages of both transparent and non transparent sound insulation barrier. Half of it is a resistive sound insulation barrier, and the other half is a transparent sound insulation barrier, which is composed of one and two. The height of the above four kinds of sound insulation barriers can be freely combined according to the design requirements, and the road screen can also be customized according to the requirements of customers.

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