JPS63118405A - Outdoor sound-absorbing wall construction method using no support - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The construction method according to the present invention relates to a method for designing and constructing soundproof walls installed for noise prevention measures on roads, railways, etc.

BACKGROUND OF THE INVENTION The structure of a conventional soundproof wall is as shown in Fig. 6. Supports (Al) made of H steel or steel pipes are provided at intervals, and beams, plates, or Soundproof wall panels (1)) are used to block gaps in order to block out sound (hereinafter referred to as span materials).

Problems to be Solved by the Invention The main external force that acts on a soundproof wall is wind load, but in conventional soundproof walls, this is received once by the span members, and then transmitted to the support column (a) through the span members. The structure is such that the support column (a) transmits information to the foundation. If the pillars (Al) are arranged at equal intervals, one pillar (Al) will carry the wind load equal to the distance between the pillars. The load transmitted to the object will be concentrated on the support installation part.

Steel plates have little bending resistance in their original form, but when a shape is attached to a plate (hereinafter referred to as a shaped plate), such as a deck plate, keystone plate, corrugated plate, or roofing material, the bending resistance increases and the bending resistance increases. Various shaped plates have been developed and commercially available as roofing materials.

The span members of conventional soundproof walls only catch the wind, but do not have the power to resist the wind as a structural body. Without this span material, there would be no wind pressure in this part, and if wind pressure is applied to one span material,
I'm just passing it on as a pillar. In other words, this span material can transmit force in the horizontal direction, but cannot transmit it in the vertical direction. On the other hand, the column (a) is fixed to the foundation and has the ability to transmit vertical force to the foundation using a cantilever beam. Ultimately, all external forces are transmitted to the foundation, so if the span material has the ability to transmit force in the vertical direction, just like column (a), the force applied to column (a) will be reduced. , if you increase this transmission ability, 1. Support column (a) will no longer be needed.

Conventional soundproof wall spans only have the ability to block sound. Even if this span material has the ability to directly resist external forces, it does not impair its sound blocking ability, and it is quite possible to have it serve both functions.

The construction method according to the present invention aims to reduce the construction cost and construction period by giving the span material of the soundproof wall a function of resisting external forces and eliminating the pillar (a).

Techniques to solve the problem Amniotic membrane Conventional soundproof walls have a sound absorbing material (5) and a top plate (61).
There is a back plate q (perforated) and a sound absorber (5) inside, but this back plate 0 is responsible for sound insulation and force transmission. The one without the sound absorber (5) is structurally similar to the one with the sound absorber (5) but with only the back plate q removed.

The soundproof wall construction method of the present invention is used for outdoor soundproof walls installed as a soundproofing measure for roads, railways, etc., as shown in the first factor.
Parallel concave and convex stripes (1), (2
) on vertically arranged corrugated plates, deck plates, etc. (3
) is sequentially fixed to base # (8) to form a wall (4), and when a sound absorption effect is required, a sound absorber (5) is attached to this.
A flat top plate such as a perforated plate (6
) and construct the soundproof wall (7), as well as the shape plate (3).
) It resists external forces such as wind load and wind pressure depending on its shape. In conventional soundproof walls, the wind load is concentrated on the pillars (1), but this concentrated load is distributed and borne by the cantilever plate (3).

The method of transmitting the load to the foundation is shown in Figure 5 in the earthwork section (
There are two methods: insert the form plate (3) directly into the soil like a sheet pile and use the depth of penetration to resist wind loads, or set up a concrete foundation as an intermediate foundation and attach the form plate (3) to it. In elevated sections, form plates (3) are used when constructing wall parapets.
The method of embedding the root part of the wall railing in the wall railing, and the method of burying the root part of the wall railing,
The support stand (10) placed at the lower end of the wall railing shown in the figure and the horizontal beam (9a) installed on the wall railing are fixed to the wall railing using fixing fittings such as concrete anchors.
1o) and the method of attaching the root of the shape plate (3) to the horizontal plate (9a).

A comparison will be made between the case where the acting wind load is received by a cantilever plate as shown in FIG. 4, and the case where it is transmitted to the column (a) through the column spacing material.

The wind load is a distributed load, and if the height of the soundproof wall is Tlm, the bending moment due to the writing force 1 at the fixed end of the cantilever plate is v, = qH!/2.
When it comes to holding Uke on the pillar of rrL, hai=machi・t=
q H'J! A bending moment of , / 2 will be applied to one pillar ζ.

By the way, the spacing between the columns is 2 rrL, and the width of the column (a) is 2
If we assume that the distance is 0m, then the Uke will have 10 times the wind force with a width of 207FL. If we roughly assume that the moment of resistance is proportional to the thickness of the plate if the shape is the same, then
Even if they have the same shape and have a loquat wall thickness of 1/10, they can resist wind load even if they are lined up side by side, and since they are lined up sideways, the span can be closed. If the spans can be closed, it is possible to block out sound, and unlike conventional soundproof walls, there is no need to provide span materials to block out sound.

Table 1 shows an example of the section modulus and weight of the strut material and plate (3). Regarding the shape plate (a), the section modulus per width of 2 m and 47 FL, which are common spans of column soundproof walls, is shown. The section modulus of the column fat is larger per member, but when looking at the entire span, the section modulus of the plate (3) is sufficient to compete with that of the conventional column (1). If the shape plate (3) can be cut and used in combination in areas where the bending moment is large, the shape plate (3) alone can sufficiently resist the wind load.

Table 2 shows a trial calculation of the required section modulus of the wind resistance material for a soundproof wall. Considering that the height of a soundproof wall is generally 5 m or less, it is better to use the two-layer method, etc. It can be seen that the shape plate (3) can sufficiently resist the wind.

Table 2 Note: The allowable stress of steel is 2400, taking into account the additional wind load.
Kq/crI! Embodiment The soundproof wall construction method of the present invention breaks away from the fixed concept of a conventional soundproof wall structure that resists wind loads using pillars (a). Although the span members of conventional soundproof walls are provided to block out sound, wind loads are generated as a result, and the span members themselves do not contribute to the wind resistance of the soundproof wall as a whole. The soundproof wall construction method of the present invention takes into consideration the effective use of span materials. By arranging cedar boards (3) such as deck plates in a continuous cantilevered manner, sound isolation performance is maintained, and the support pillars (
This eliminates the need for al.

As an example of the present invention, the first example is an example implemented on an elevated structure.
Figure 5 shows an example of the method applied to an embankment structure. Figure 1~
Figure 3 shows a supporting stand (10) made of lightweight section steel attached to the elevated wall railing (8), and vertically parallel uneven stripes (1), (
Attach the lower part of a cedar board (3) such as a corrugated board or deck plate with a ) and join the cedar boards (3) through the sound absorber (5) and the perforated top board (6) to cover the surface of the sound absorber (5) to create a soundproof wall (
7) was installed to prevent one piece from falling in the event of a car collision.

Figure 5 shows a soundproof wall (
7) was installed privately, and the cedar planks themselves have the same effect as a pile foundation, showing an example in which a special foundation is not required.

Effects of the Invention According to the soundproof wall construction method of the present invention, the support column (a) is unnecessary and its cost becomes unnecessary. Further, as in the embodiment of the embankment structure shown in FIG. 5, no special foundation is required, which reduces the cost of foundation work. Of the total construction cost of a soundproof wall, the support cost accounts for about half of the cost for elevated structures, and the majority of the foundation work and support cost for embankment structures.However, if the construction method of the present invention is used, the construction cost will be halved and national expenses will be reduced. It saves a lot of money.

In addition, there is no need for special support construction, and unlike conventional soundproof walls, there is no need to pinch boxes of 50 holes or 100 m.
Since the cedar boards can be installed in large units, the construction period can be greatly shortened.

In addition, exterior plates that cannot resist the wind by themselves can be easily attached to cedar boards (3) such as deck plates, and the exterior can be easily installed from the viewpoint of aesthetics and driving safety without any major construction work. It becomes possible.

[Brief explanation of the drawing]

Figure 1 is a rear view of the soundproof wall constructed using the construction method of the present invention, Figure 2 is a vertical cross-sectional view of the same, Figure 3 is a detailed cross-sectional view of the same, Figure 4 is an explanatory diagram of wind load loading conditions, and Figure 5 is a soundproof wall according to the present invention. A longitudinal cross-sectional view showing an example of the embankment part of the wall, Fig. 6 is a back view of a conventional elevated soundproof wall, and Fig. 7
The figure is a detailed cross-sectional view of a conventional soundproof wall panel. In the figure, (1) is the grooved part, (2) is the convex part, (3) is the engraving, (4) is the back plate, (5) is the sound absorber, (6) is the front plate, and (7
) is the entire soundproof wall (8) is the foundation, (9) is the horizontal wall, (10
) I support stand, (11)≦fixing metal fittings, (12) is a cap, (13) is an anchor, (a) is a support, (b) is a soundproof wall panel, and 0 is a back plate. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 (Wall high loss) Figure 7 C back plate 13 Air layer

Claims (1)

[Claims] For outdoor soundproof walls installed as a noise prevention measure for roads and railways, etc., the roots of shaped plates such as corrugated plates and deck plates with parallel uneven stripes arranged vertically are fixed to the foundation or support base without providing supports. An outdoor soundproof wall construction method that does not use pillars to form a wall and resist external forces by forming a plate shape.