JP4683583B2 - Construction method of soundproof wall - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a soundproof wall provided for reducing noise generated from roads, railways, factories and the like.
[0002]
[Prior art]
Conventionally, as a means for preventing noise generated from roads, railways, factories, etc., in order to prevent noise from directly propagating from a noise generating source, it is widely used to install a soundproof wall. This is because, among various noise prevention measures, the soundproof wall is relatively inexpensive and is effective against various noise sources.
[0003]
By the way, in order to further enhance the noise reduction effect in such a soundproof wall, it is necessary to increase the height of the soundproof wall. However, increasing the noise barrier leads to an increase in cost (the higher the height, the greater the construction cost, etc.). In addition, there are problems such as sunshine, landscape, view, pressure, ventilation, radio interference, and wind pressure load.
[0004]
Therefore, if the noise reduction effect is not enough with the straight wall alone, the tip of the soundproof wall is bent to the noise generating source side with a `` U '' shape, and the soundproof wall is bent to the noise generating source. However, these problems are more serious than those of straight walls. In recent years, environmental noise problems have become more serious with increasing traffic volume and speeding up of vehicles, and effective countermeasures have been studied. However, at the expense of the above-mentioned drawbacks, such as 5 m, 7 m, and 10 m are high. A straight wall type soundproof wall, a bend type soundproof wall, and a curved soundproof wall are used. However, even if such a high soundproof wall is used, it is only an effect commensurate with the height. For example, the noise reduction effect at a distance (about 20 m away from the soundproof wall) is 1 m higher than the soundproof wall. By doing so, it is only reduced by about 1 dB.
[0005]
Therefore, in order to increase the noise reduction effect without increasing the height of the soundproof wall, a Y-type soundproof unit is configured by providing a pair of branch walls so as to form an opening upward. A soundproof wall was developed at the top of the wall. Using this Y-type soundproof wall, the noise from the sound source was measured at the evaluation point. When this measurement result was compared with the measurement result using a straight wall having the same height instead of the Y-type soundproof wall, the Y-type soundproof wall had a greater noise reduction effect than the straight wall.
[0006]
Furthermore, a so-called reindeer-type soundproof unit having a re-branching wall that is bent inwardly from the front end of a pair of branch walls has been developed. This reindeer type soundproof unit has a greater noise reduction effect than the Y type soundproof unit.
[0007]
Furthermore, the noise reduction effect is even greater when two or more such soundproof units are connected in the horizontal direction.
[0008]
When the second soundproof unit is connected to the soundproof unit on the main body wall in the horizontal direction, the second soundproof unit is supported with the soundproof unit side as a fulcrum, like a cantilever, so It was made of synthetic resin because it was not sufficient. The second soundproof unit is produced in advance at a predetermined size in a factory. At the construction site of the soundproof wall, it is impossible to make the interval between the columns constant, and the plurality of second soundproof units did not fit exactly within the column interval. Therefore, for example, when seven second soundproof units are connected horizontally, if there is a width of one third of one unit up to one column, only the mounting bracket attached to the column is extended. It was.
[0009]
[Problems to be solved by the invention]
When the plurality of second soundproofing units cannot be arranged in the full width between the conventional struts, and only the mounting bracket is extended so that it can be attached to the struts, the soundproofing effect at the place where the second soundproofing unit does not exist is inferior. .
[0010]
Therefore, the present invention provides a method for constructing a soundproof wall by cutting the second soundproof unit having a certain size and connecting it to the soundproof unit at the end so as to fill the gap between the columns so as not to lower the soundproof effect. The purpose is to do.
[0011]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is such that a pillar made of H steel is erected in a state where the interval is not constant, and a wall body is provided between these pillars to constitute a body wall, and at least the sound source side and the counter sound source side A soundproof unit formed of a steel plate having a pair of branch walls extending obliquely upward is attached to the upper portion of the main body wall, and predetermined at a plurality of synthetic resin factories having a soundproof space on one branch wall of the soundproof unit. In the construction method of the soundproof wall in which the second soundproof unit produced in the dimension of is connected in the horizontal direction, reinforcement is made between the side plates provided on the mounting brackets that are fitted and fixed in the U-shaped passages of the two columns. A plate is provided, and a soundproof unit is installed and installed between the reinforcing plate and the side plate, and both ends of a pair of branch walls extending obliquely upward on the sound source side and the opposite sound source side are fixed to the side plate, and the intermediate portion To the reinforcing plate, and The both ends of the branch walls bent inward from the ends of the branch walls are fixed to the side plate, and the intermediate portion is fixed to the reinforcing plate, and the soundproof unit is constructed on the site. The side surfaces of the plurality of second soundproof units are When a space narrower than the width of one second soundproof unit remains at the end of the soundproof unit when connected to the soundproof unit, the width of the second soundproof unit is reduced to the narrow space. They are cut together and connected to the end of the soundproof unit.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0013]
The embodiment shown in FIG. 1 is a schematic view as seen from the front. A pillar 1 made of H steel is erected at a predetermined interval, and a wall body 2 is provided between the pillars 1 to constitute a body wall 3. is there. A soundproof unit 4 is attached to the upper part of the main body wall 3, and a second soundproof unit 5 is attached behind the soundproof unit 4. A front panel 6 is provided at a lower position on the front side of the soundproof unit 4. Further, mounting brackets 7 are provided at both ends of the plurality of soundproof units 4 connected side by side, and the mounting brackets 7 are fitted and fixed to the U-shaped passages 1A of the columns 1 made of H steel. It is like that.
[0014]
FIG. 2 is a plan view seen from above in FIG. 1, and the soundproof unit 4 is attached between the side plate 8 provided on the mounting bracket 7 and the reinforcing plate 9 provided between these side plates 8. That is, the pair of branch walls 4A and 4A extending obliquely upward on the sound source side and the counter sound source side are formed of steel plates. Both ends of the branch wall 4A made of this steel plate are fixed to the side plate 8, and the intermediate portion is fixed to the reinforcing plate 9. Further, re-branching walls 4B and 4B are formed which are bent inward from the ends of the branch walls 4A and 4A. These re-branching walls 4B and 4B are also formed from steel plates, and both ends and intermediate portions thereof are fixed to the side plate 8 and the reinforcing plate 9. A second soundproofing unit 5 is attached behind the soundproofing unit 4 configured in this manner. Here, when the total width W _{1 to} both ends of each mounting bracket 7 is 2110 mm, the total width W ₂ of the soundproof unit 4 is 1900 mm. At this time, in order to attach the mounting brackets 7 on both sides of the soundproof unit 4 between the adjacent struts 1, the width of one second soundproof unit 5 is formed to 250 mm when applied with a length of W _1. when, when connecting the second soundproofing unit 5 seven laterally, the second soundproof unit 50 with respect to the total width W ₂ of the soundproof unit 4 requires at one end to a width of the 150 mm. At this time, the second soundproof unit 5 having a certain size is cut to a width of 150 mm and fixed to the adjacent second soundproof unit 5 and the end of the soundproof unit 4 on the sound source side. This soundproof unit having a width of 150 mm is denoted by reference numeral 50.
[0015]
FIG. 3 shows a side cross section, and shows a state in which the second soundproof unit 5 is attached behind the soundproof unit 4 having a substantially diamond-shaped cross section. Here, reference numeral 10 denotes a rear panel. As shown in FIG. 3, the soundproof unit 4 includes a pair of branch walls 4A and a pair of re-branch walls 4B. Further, the second soundproof unit 5 is fixed to the branch wall 4A and the re-branch wall 4B facing the opposite sound source side. The second soundproof unit 5 has two soundproof spaces 51 and 52. The soundproof space 52 is formed in a rhombus shape similar to the soundproof unit 4.
[0016]
As the synthetic resin material forming the second soundproof unit 5, polypropylene, ABS resin, polycarbonate, or the like is preferably used. The second soundproof unit 5 is produced at a factory in a certain size.
[0017]
【The invention's effect】
As described above, according to the present invention, pillars made of H steel are erected in a state where the interval is not constant, and a wall body is provided between these pillars to constitute a body wall, and at least the sound source side and the anti-sound source side A soundproof unit formed of a steel plate having a pair of branch walls extending obliquely upward is attached to the upper portion of the main body wall, and predetermined at a plurality of synthetic resin factories having a soundproof space on one branch wall of the soundproof unit. In the construction method of the soundproof wall in which the second soundproof unit produced in the dimension of is connected in the horizontal direction, reinforcement is made between the side plates provided on the mounting brackets that are fitted and fixed in the U-shaped passages of the two columns. A plate is provided, and a soundproof unit is installed and installed between the reinforcing plate and the side plate, and both ends of a pair of branch walls extending obliquely upward on the sound source side and the opposite sound source side are fixed to the side plate, and the intermediate portion To the reinforcing plate, and The both ends of the branch walls bent inward from the ends of the branch walls are fixed to the side plate, and the intermediate portion is fixed to the reinforcing plate, and the soundproof unit is constructed on the site. The side surfaces of the plurality of second soundproof units are When a space narrower than the width of one second soundproof unit remains at the end of the soundproof unit when connected to the soundproof unit, the width of the second soundproof unit is reduced to the narrow space. Since it was cut together and connected to the end of the soundproofing unit, it is possible to prevent the reduction of the soundproofing effect by providing the second soundproofing unit over the entire width between the struts even in a place where the interval between the struts is not constant. it can. In addition, it is possible to secure the fixing of the mounting fitting fitted into the U-shaped passage of the support column.
[Brief description of the drawings]
FIG. 1 is a front view showing a preferred embodiment of the present invention.
FIG. 2 is a plan view.
FIG. 3 is a longitudinal sectional view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Prop 2 Wall main body 3 Main body wall 4 Soundproof unit 5 Second soundproof unit 7 Mounting bracket 50 The cut second soundproof unit

Claims (1)

Support columns made of H steel are erected in a state where the interval is not constant, a wall body is provided between the columns to constitute a main body wall, and at least a pair of branch walls extending obliquely upward on the sound source side and the counter sound source side are provided. A second soundproof unit produced in a predetermined size at a plurality of synthetic resin factories having a soundproof space on one branch wall of the soundproof unit. In the construction method of sound barriers connected horizontally,
A reinforcing plate is provided between the side plates provided on the mounting bracket that is fitted and fixed in the U-shaped passage of the two support columns,
Install and install a soundproof unit between the reinforcing plate and the side plate on site,
Both ends of a pair of branch walls extending obliquely upward on the sound source side and the opposite sound source side are fixed to the side plate, the middle part is fixed to the reinforcing plate, and both the branch walls bent inward from the ends of the branch walls While fixing both ends to the side plate, the middle part is fixed to the reinforcing plate and the soundproofing unit is constructed on site,
When the side surfaces of the plurality of second soundproofing units are connected to each other and a space narrower than the width of one second soundproofing unit remains at the end of the soundproofing unit when connected to the soundproofing unit, A method for constructing a soundproof wall , characterized in that the width of the soundproof unit 2 is cut in accordance with the narrow space and connected to the end of the soundproof unit.

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