JPH05340006A - Noise proof constructing method for building - Google Patents

Abstract

PURPOSE:To prevent generation of noise and to reduce construction period by coating a member having sound absorbing performance on the outer surface of a building made of a hard member with a spraying means. CONSTITUTION:A foaming resin layer 3 as a member having sound absorbing performance is coated on an outer surface 21 of an H-shape steel 2 with a spraying means such as a spray. Then, a synthetic resin layer 4 having appropriate density and mass is coated on the foaming resin layer 3 with the same means to form a plurality of sound absorbing layers on the steel 2. The entire steel structure formed by the steel 2 is completely covered by the foaming resin material 3 so as to shut out the outer surface of the steel 2 from the outside air. Moreover, vibration energy transmitted to the steel 2 is absorbed by buffer action of babbles 31 contained in the foaming resin layer 3 so as to prevent propagation outside the foaming resin layer 3. Also, the vibration energy is perfectly absorbed by the synthetic resin layer 4 which has been coated on the foaming resin layer 3 and has different singing characteristics to further complete noise reduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing noise caused by vibration energy of a structure made of a hard member such as a steel frame, and particularly to prevent the generation of noise by blowing a sound absorbing member onto the structure. Regarding

[0002]

2. Description of the Related Art Noise generated by passing a vehicle such as a train includes noise generated by power of a vehicle (motor, diesel engine), noise caused by sliding contact between an overhead line and a pantograph, and noise caused by contact between wheels and an iron road. Be done. In particular, the vibration due to the contact between the wheel and the iron passage when passing at a high speed has a very high energy value, and if this energy is generated in a place such as a steel frame structure where the energy is easily transmitted, it becomes a noise with a high sound pressure level. Conventionally, as a means for reducing such noise, noise reducing means based on a cushioning action of a sound absorbing material has been known, and generally, measures such as providing a soundproof wall in which a sound absorbing material is arranged on a steel frame structure are taken. Has been taken.

[0003]

However, in order to construct a soundproof wall over the entire area of a huge steel frame structure, it is necessary to consider the strength associated with the increase in weight and the strength against wind pressure. It is difficult.
In other words, since the soundproof wall itself is not small, heavy equipment such as a crane may be required during construction, which may be dangerous due to large-scale construction, and there are problems in terms of construction period, labor cost, material cost, etc. There is. Moreover, since such a means does not suppress the vibration energy of the steel frame structure, its soundproofing has a limit, and as described above, a satisfactory effect is obtained despite the long time and high cost. The reality is that there is none.

The present invention has been developed in view of such conventional problems, and an object thereof is to realize a short construction period with a simple and easy work and to obtain an excellent soundproof property. A method of constructing a soundproof structure is provided.

[0005]

In order to achieve the above object, the present invention provides a method characterized in that an outer surface of a structure made of a hard member is coated with a member having a sound absorbing property by a spraying means. did. In this case, the layer coated by the spraying means is further overlaid with members having different sound absorbing characteristics and coated by the spraying means,
It is preferable to form a plurality of sound absorbing layers. Further, the sound absorbing member is a foaming resin, or a porous resin, and a soft resin having an appropriate density and mass, and the sound absorbing member is made to contain heavy powder particles such as metal powder particles. Is also optional, and it is preferable to color the sound absorbing member in an arbitrary color.

[0006]

Since the member having the sound absorbing property is arranged by the spraying means, it is possible to completely apply it to the complicated portion or the curved portion of the steel frame structure. That is,
The entire steel frame structure can be completely covered with a sound absorbing member to form a sound absorbing layer, and the outer surface of the steel frame is shielded from the atmosphere. The vibration energy of the steel structure is absorbed by the cushioning effect of the air bubbles contained in the foamable resin layer having a sound absorbing property, and is prevented from propagating to the outside of the foamable resin layer.
Next, the vibration energy is completely absorbed by the synthetic resin layer having different sound absorbing characteristics, which is coated over the foamable resin layer, and the soundproofing becomes more complete. At this time, if the synthetic resin layer coated on the expandable resin layer contains powder particles having a large mass such as metal powder particles, abnormal resonance energy is not generated in the synthetic resin layer. Further, when a member having a sound absorbing property is colored in an arbitrary color, the synthetic resin layers coated in layers act as a rust preventive and a decorative material to improve the weather resistance of the steel frame structure.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are views showing a noise-preventing H-section steel 1 obtained by the method of the present invention. According to this, H
As a member having a sound absorbing property on the outer surface 21 of the shaped steel material 2,
For example, the foamable resin layer 3 is coated by a spraying means such as a spray. Then, the foamable resin layer 3 is coated with a soft resin having an appropriate density and mass, that is, a synthetic resin layer 4 having a higher density and a heavier mass than the foamable resin layer 3 by the same spraying means as above. is doing. Further, in this embodiment, the synthetic resin layer 4 is made to optionally contain the heavy mass powder particles 41 made of metal powder particles, and is colored in an arbitrary color so as to also serve as coating.

In this embodiment, the foamable resin layer 3 has a thickness of 3 to 3.
Bubbles 31 for obtaining a cushioning effect are obtained by spraying so as to have a thickness of about 5 mm and using urethane foam. Also, the synthetic resin layer 4 to be overlaid is 2 mm
The synthetic resin layer 4 is sprayed so as to have a thickness, and a soft resin such as synthetic rubber or vinyl chloride is used.
1, the lead pieces and iron pieces are contained in appropriate amounts. However, the members and dimensions shown here are merely examples, and the members having other sound absorbing properties may not be spray-coated on the outer surface 21 of the steel material 2.

The thickness of the coating by spraying can also be appropriately changed depending on the implementation. In this case, steel material 2
If there is a gap between the outer surface 21 and the foamable resin layer 3, a sufficient soundproofing effect cannot be obtained. Therefore, when the foamable resin layer 3 is sprayed, dirt, rust and oil film on the outer surface 21 of the steel material 2 It is necessary to remove it in advance. It should be noted that the blowing work of the foamable resin layer 3 and the synthetic resin layer 4 onto the steel material 2 is performed not only before the construction of the steel frame structure but also after the construction or for the existing steel frame structure. Is also good. Incidentally, the construction method of the present invention is not limited to the above example,
Of course, it can be widely applied to building structures, vehicles, trains, machines such as construction machines, and other structures.

Next, the operation of this embodiment will be described. According to this embodiment, the foamable resin layer 3 having the sound absorbing property is used.
Since the arrangement of the
It can be applied completely to complicated areas and curved areas. That is, the entire steel frame structure (not shown) formed of the steel material 2 can be completely covered with the foamable resin layer 3, and the outer surface of the steel material 2 is shielded from the atmosphere.

The vibration energy transmitted to the steel material 2 is absorbed by the buffer effect of the bubbles 31 contained in the foamable resin layer 3,
It is prevented from propagating to the outside of the foamable resin layer 3. Then, the vibration energy is completely absorbed by the synthetic resin layer 4 having different sound absorbing characteristics, which is coated on the foamable resin layer 3 in a completely different manner, and the soundproofing becomes more complete.

At this time, since the synthetic resin layer 4 coated on the expandable resin layer 3 contains the heavy mass powder particles 41, abnormal resonance energy is not generated in the synthetic resin layer 4. Further, since the synthetic resin layer 4 coated in layers is colored in an arbitrary color, it acts as a rust preventive material and a decorative material to improve the weather resistance of the steel frame structure.

[0013]

As is apparent from the above description, according to the present invention, the following excellent effects can be obtained. That is, the noise source is not surrounded as in the prior art, but the noise source is completely covered, so that a remarkable damping characteristic can be obtained as never before. Since the member having the sound absorbing property is applied by spraying, that is, it can be implemented at a very low cost, that is, a small cost is required for coating the structure. Moreover, such a spraying method can double as paint painting (rust prevention and makeup), and the construction procedure can be carried out in the same manner as the painting work, so that it can be done easily and safely in a short period of time, and at the same time, paint painting In addition to being able to save the cost required for the above, it does not require various supporting members as in the prior art and does not become a load on the structure.

[Brief description of drawings]

1 shows a noise-preventing H-section steel according to the method of the invention.

FIG. 2 is a view showing a cross section of a sound absorbing layer.

[Explanation of symbols]

 2 Steel 3 Foamable resin layer 4 Synthetic resin layer

Claims (5)

[Claims] 1. A method for preventing noise of a structure, wherein an outer surface of the structure made of a hard member is coated with a member having a sound absorbing property by a spraying means. 2. The structure according to claim 1, wherein a member having a different sound absorbing property is further stacked on the layer coated by the spraying means and coated by the spraying means to form a plurality of sound absorbing layers. Noise prevention method. 3. The noise prevention of the structure according to claim 1, wherein the sound absorbing member is a foaming resin or a porous resin and a soft resin having an appropriate density and mass. Construction method. 4. The sound absorbing member contains heavy powder particles such as metal powder particles.
Noise prevention method for structures described in. 5. The method for preventing noise of a structure according to claim 1, wherein the sound absorbing member is colored in an arbitrary color.