Anping Hengai reminds: blind increase in road sound barrier or will have negative effects

A road sound barrier is a flat reflective baffle that is erected at the edge of the road. Its noise reduction is about 10dB or even smaller, especially in the case where the relative orientation of the fast lane and the residential area has been determined, the road sound barrier becomes the only feasible traffic noise control method.

The road sound barrier is mainly composed of two parts: a steel structure column and a sound-absorbing screen. The column is the main force-receiving member of the sound barrier. It is fixed on the road anti-collision wall or the pre-buried steel plate on the track side by bolts or welding; The sound board is the main sound-absorbing and sound-absorbing member, which is fixed in the H-shaped column groove by a high-strength spring clip to form a sound barrier. Highway sound barriers are mainly used for noise reduction products of various acoustic environment noise treatments such as high-speed railways, highways, viaducts, rail transit, power stations, hospitals, schools, industrial construction sites.

The average sound insulation of the road sound barrier is 37dB, and the average sound absorption coefficient is 0.84. It has water resistance, heat resistance, UV resistance, and does not cause deterioration in performance or quality due to changes in rain water temperature. However, when the road sound barrier is subjected to corrosive substances such as acid rain, it is necessary to take timely measures such as flushing with water. Reduce the impact of objects with high impact, so as not to affect the appearance and service life of deformation.

The road sound barrier is a customized product, which can be customized according to customer requirements. However, some screens have higher specifications. If no support parts are added, it will not be stable and affect the installation quality.

So how do you make the sound barrier more stable? In products above the fixed specification, diagonal braces can be added to support the sound barrier screen to maintain its stability. The diagonal bracing is an important part of the sound barrier. It is an important structure for fixing the sound barrier screen material and transmitting the force to the foundation, so that the variable shape of the sound barrier can be realized.

The characteristics of road sound barriers can often be improved by adding their heights. Although a height increase of 1 m can bring about 1.5 dB of IL addition, the following negative effects are not ignored.

1) lack of light in residential areas on both sides of the road;

2) The driver's vision is covered, which is easy to cause visual fatigue;

3) The barrier is increased, resulting in the addition of self-weight, and the root requirement is strengthened, and the cost is increased.