Discuss the noise reduction platform analysis and sound insulation design scheme of highway noise barriers

　　1. There are two ways to control noise: one is to reduce noise at the source;

　　One is to block the propagation of noise in the propagation path. The top of the fiberglass reinforced plastic anti-corrosion sound-absorbing board uses paper-faced gypsum board, the surrounding uses mature gypsum molding modules, and the periphery uses light wooden geometric structural base plates. Then, according to the installation method of the track and the net size of the movable partition wall. Top arc noise barrier internal structure: using sound-absorbing material as the core board, using rock wool color steel plate sound prefabricated components assembly. Top arc noise barrier product advantages: *High sound insulation: average sound insulation 10. The railway noise barrier connects a device at the sound source and the receiver, so that the ultrasonic wave has a significant additional loss, thus weakening the noise hazard in a certain area of the receiver, and this device is called a noise barrier. The effect of the noise barrier cannot completely block the propagation of sound, and the sound wave frequency will encounter diffraction and projection conditions when encountering the noise barrier.

　　Noise barrier target design analysis: When designing the highway noise barrier target, A should fully consider the background noise value of the maintenance space environment. When the background noise value of the receiving point is lower than the noise standard of the space environment, the design can use the method of subtracting the regional noise standard from the road traffic noise value; when the noise value of the receiving point is higher than the noise standard of this area, it is necessary to determine by the difference between the road traffic noise value and the sound decibel coefficient; when only using noise barrier measures cannot meet the design target or safety and economic development needs, comprehensive noise prevention measures can be adopted, and noise barriers can be used in combination with landscaping, false road cuts, and fully enclosed measures.

　　2. Highway noise barrier length analysis: Generally speaking, the width of the noise barrier is equivalent to the width of the single-sided noise barrier, and it is received by the distance between the receiving point and the noise barrier. In fact, the noise barrier cannot meet the sound insulation requirements in the area, so the length of the noise barrier can be determined according to the basic law of noise attenuation and noise reduction effect.

　　3. Audio relative height design scheme: Audio relative height is crucial to noise barrier design, but it is often overlooked in actual design. The design will conduct a survey and analysis of vehicles in the nature reserve, and then clarify. Usually, the relative height of the sound source is 0.2~1.5m. If all the values are unified, it may not be suitable for all expressway roads, especially sections with special driving vehicles. Therefore, when selecting the relative height of the sound source, it is necessary to consider and fully integrate the characteristics of road vehicle types.

　　4. The function of highway noise barriers should have a certain strength, intensity and reliability. During the design, we should comprehensively consider the stiffness and strength of the screen body; the stability and compressive strength of the poles and foundations; and the firmness of the connections of various parts of the noise barrier. At the same time, because the highway noise barrier is located on both sides of the road, the impact of the highway noise barrier on roadbed engineering, bridge construction, and driving network information security should be fully considered.

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