The structure and noise reduction principle of road sound barriers

　　What regulations should the structural design of road sound barriers meet?

　　1. The structural design of road sound barriers should comply with the provisions of relevant standards.

　　2. The structural form of the road sound barrier should be determined according to the requirements of the project and the environment. The sound-absorbing composite structure should adopt integral components.

　　3. The structural design of road sound barriers should consider self-weight, wind load, train pulsation and other loads. The design load of the sound barrier should be comprehensively considered according to the loads that may act simultaneously during use, and the design should be carried out under unfavorable conditions.

　　4. The connection between the bridge railing and the bridge, and the connection between the roadbed sound barrier and the foundation should use cast-in-place concrete connectors or bolt connectors.

　　5. Expansion joints should be set up in the sound barrier and should be sealed; the sealing methods of swing wedges and trapezoidal connections should be considered, and expansion joints should be set up at the connection of the beams.

　　Structure of highway sound barriers

　　Highway sound barriers are used to control traffic noise pollution on one or both sides of the highway, which can reduce the harm of noise to residents around the highway. The materials of highway sound barriers are mainly composed of metal sound-absorbing screens, transparent sound barriers, columns and connecting pieces.

　　The H-shaped column is the main load-bearing structure of the highway sound barrier, which is fixed to the road crash wall or pre-embedded plate by bolts. The sound insulation board is the main sound insulation and sound absorption component, which is fixed in the H-shaped steel trough by high-strength safety clips.

　　Noise reduction principle of road sound barriers

　　The higher the road sound barrier, the larger the shadow area, and the greater the attenuation effect on the sound. This is obvious, but high noise barriers may bring many problems in terms of structure, environment, and cost, so the noise barrier itself cannot be built too high.

　　When designing sound barriers, it is necessary to make the best use of local conditions and terrain to improve the effective height of the sound barriers, so as to achieve better results at a lower cost.

　　Generally, when the sound source is higher and the receiving area is lower, the sound barrier can better attenuate the sound. For example, when setting up sound barriers on both sides of the road, the road height is used to improve the effective function of the barrier, so the range of the sound barrier can be increased.

　　Design requirements of road sound barriers

　　Generally, common metal sound barriers are screens made of galvanized sheets and aluminum sheets. They are cut by shearing machines, punched, bent, then assembled by workers, electrostatically sprayed, and packaged and loaded. The internal structure of the sound barrier uses rock wool, which has three excellent properties: heat insulation, flame retardancy, and sound absorption. The thickness of the screen is determined by the height of the column, generally 3 meters high, and the thickness of the screen is not less than 0.7 mm. The higher the column, the thicker the screen required. The height of the sound barriers used in railway and highway areas is usually 2-4 meters. The thicker the plate used, the higher the cost.

　　(1) It has a certain noise reduction effect (generally 5dB ~ 10dB).

　　(2) It can soothe the psychological suggestion of residents along the line.

　　(3) There is no problem of re-demolition and land occupation.

　　(4) One-time investment, quick results, low maintenance cost.

　　Okay, if you need to purchase sound barriers, you can consult our factory.

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