Requirements for the Construction of Highway Noise Barrier Foundations

　　What are the factors that improve the sound attenuation of highway noise barriers?

　　Many factors affect the poor effect of highway noise barriers, such as the relative position, height, and shape of the noise barriers.

　　(1) The horizontal position of the noise barrier should be as close as possible to the sound source, which is conducive to expanding the shadow area of the noise barrier, thereby improving the noise reduction. Other conditions remain unchanged, the shadow area closer to the sound source is larger than the shadow area far from the sound source.

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　　(2) The higher the noise barrier, the larger the shadow area and the greater the sound attenuation. However, because the noise barrier is too high, it may bring many problems in terms of structure, environment, and cost. Therefore, the noise barrier itself cannot be built too high. During the design of the noise barrier, the terrain should be fully utilized to increase the effective height of the noise barrier to achieve better results at a lower cost. Generally speaking, when the sound source is high and the receiving area is low, the noise barrier has a better sound attenuation effect. For example, installing noise barriers on elevated bridges or public bridges can enlarge the shadow area of the noise barrier because the height of the highway and overpasses is used to increase the effective height of the barrier.

　　(3) The form of the noise barrier also has a great impact on sound attenuation. If the top of the noise barrier extends towards the sound source along the eaves, it is equivalent to moving the entire noise barrier towards the sound source, which can effectively increase the depth and area of the shadow area.

　　Construction requirements for highway noise barrier foundations

　　1. The construction layout should be based on the signposts, and the special points such as passage culverts should be used as the layout control points. The layout piles should be arranged according to the pile numbers near the special points given in the construction plan.

　　2. Chemical anchor bolt construction should strictly follow the product Description. If necessary, technical guidance should be obtained from the equipment supplier.

　　3. The lap length of the pile foundation and the ground beam reinforcement should meet the code requirements.

　　4. The pre-embedding of the column foundation is implemented by the civil engineering profession. There will be errors in the construction requirements of the highway company's noise barriers. When installing the highway company's noise barriers, the spacing and coaxiality errors of the embedded parts should be automatically adjusted.

　　5. Based on the construction period and workload, formulate a specific and feasible construction plan for the manufacturing, transportation, and installation of noise barriers.

　　Application scope of highway noise barriers

　　Road noise barriers can be divided into pure sound insulation reflective noise barriers and sound-absorbing and sound-insulating composite noise barriers. The latter is a more effective sound insulation method. Noise barriers mostly use sound-absorbing and sound-insulating products. Their characteristics are to control the generation and propagation characteristics of road noise in a targeted manner. For example, the friction sound between automobiles and roads or locomotives and tracks is at the bottom of the road, and the sound diffracts through the top of the screen. Therefore, the structure of upper and lower sound absorption and middle noise barrier is adopted in the design, which can effectively reduce the diffraction of noise; the middle of the noise barrier adopts a transparent reflective sound insulation board, which can effectively block the propagation path of sound waves; it also provides a wide field of vision for drivers and residents. In the field of acoustics, the reverberation time and indoor acoustic environment are controlled through acoustic management to meet the requirements of professional venues.

　　I hope the above explanation is helpful to you. If you need customized noise barriers, remember to Contact Us.

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