The purpose of setting up sound barrier on high-speed railway;
Noise barriers are mainly used for noise isolation and reduction of noise sources such as expressways, expressways and elevated composite roads.
Selection principle of sound barrier for high-speed railway;
(1) Large sound insulation: the average sound insulation shall be not less than 35dB；;
(2) High sound absorption coefficient: the average sound absorption coefficient should not be less than 0.84;
(3) Weather resistance: The product should be water-resistant, heat-resistant and ultraviolet-resistant, and its performance will not be degraded or its quality will be abnormal due to the change of rain temperature. The products are made of aluminum alloy coil plate, galvanized coil plate, glass wool and H steel column, and the anticorrosion life of external zinc plating exceeds 15 years.
(4) Beauty: You can choose a variety of colors and shapes to combine and coordinate with the surrounding environment to form a beautiful landscape.
(5) Economy: Assembled construction can improve work efficiency, shorten construction time and save construction cost and labor cost.
(6) Convenient: installed in parallel with other products, easy to maintain and update.
(7) Lightweight: Sound-absorbing board series products have the characteristics of light weight, which can reduce the load bearing of elevated light rail and elevated road and reduce the structural cost.
(8) Fire protection: Ultra-fine glass wool is used, which is high in melting point and non-flammable, and fully meets the requirements of environmental protection and fire protection laws and regulations.
(9) High strength: Combined with different climatic conditions in different regions of China, the virtual wind load is fully tested in structural design. The groove is pressed by the production line to increase the strength.
(10) Waterproof and dustproof: Waterproof and dustproof are fully considered in the material design, and its sound absorption performance will not be affected in dusty or rainy environment. Dust removal and drainage measures are set in the structure to avoid water accumulation in the components. The sound absorption performance of micro-perforated cavity is not affected in rainy environment, especially for low and medium frequency noise reduction.
(1 1) Durability: The product design fully considers the wind load of roads, the impact safety of traffic vehicles and the open-air corrosion protection of all gas holidays. The products are made of aluminum alloy coil plate, galvanized coil plate, glass wool and H-beam column. No corrosion, no deformation, and the sound absorption and sound insulation effect will not be reduced during the warranty period.
Classification of high-speed rail metal sound barrier;
Subgrade part:
2.95m general area, 250km/h (HW 150× 150-4× M24)
Sound (wind) barrier of 2.95m in general area, 350km/h (4×M24).
Sound (wind) barrier in typhoon area of 2.95m, 250 ~ 350km/h (6× m24).
3.95m general area noise barrier, 250 ~ 350km/h (with transparent board, 6×M24)
Bridge part:
General area and typhoon area1.97m wind barrier (4×M24) (currently only for Beijing and Shanghai)
2. 15m sound barrier in general area and typhoon area, 250 ~ 350km/h (6× m30)
3. 15m general area wind barrier, 250 ~ 350km/h (with transparent board, 6×M30)
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