JPH01299906A - Setup method for noise insulating wall in high level traffic route - Google Patents

Abstract

PURPOSE:To prevent any reflection hindrance of television waves to a television set of a private hose or the like from occurring by setting up a metal plate of more than 3m in longitudinal width of a plate surface at a tilt angle of outer upward as specified. CONSTITUTION:Each column 2 is erected in a side edge of a high level traffic route 1 at the required interval, and one end of each bracket 3 lengthening from an upper part to a lower part successively is fixed to a required position from the upper part to the lower part of an outer surface of each column 2. Then, a frame 4 is fixed to the other end of each bracket 3, and a metal plate 5 for noise insulation-cum-wave reflection is fixed to place over an outer circumferential surface of each frame 4 so as to cause a tilt angle theta to become more than 10 deg., thereby constituting a noise insulating wall 6.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for installing a soundproof wall on an elevated transportation road such as an elevated expressway or an elevated railway, and more particularly, to a method for installing a soundproof wall on an elevated transportation road such as an elevated highway or an elevated railway. The present invention relates to a method for installing a soundproof wall that prevents reflection interference (ghost phenomenon) of TV radio waves from TVs such as TVs.

"Prior Art" Conventionally, soundproof walls in elevated traffic roads such as elevated expressways or elevated railways are often installed vertically on the side edges of the elevated traffic roads.

"Problem to be Solved by the Invention" By the way, as mentioned above, when the soundproof wall on an elevated traffic road is installed vertically, the TV radio waves incident on the vertical soundproof wall are
It is reflected horizontally and diagonally downward by the vertical soundproof wall,
This reflected TV radio wave is received by a TV antenna in a private house, etc., causing a wavelength shift from the TV radio wave that normally enters the TV antenna, causing a ghost phenomenon on the TV in a private house, which is the problem of TV radio wave reflection interference. there were.

The present invention has developed a method for installing a soundproof wall to solve the problem of reflection of television waves caused by the conventional soundproof walls of elevated traffic roads.

``Means for Solving the Problems'' The gist of the present invention is to use a metal plate with a vertical width of 3 m or more as a soundproof wall for an elevated traffic road.
A method for installing a soundproof wall on an elevated trafficway, characterized in that the wall is installed so as to have an outwardly upward inclination angle greater than or equal to the above.

"Function" As mentioned above, by installing a metal plate with a vertical width of 3 m or more on the plate surface so that the plate surface has an outward upward inclination angle of 10' or more, as a soundproof wall for an elevated traffic road, Television radio waves incident on the metal plate can be reflected outward and upward.

"Example" Next, an example of the method for installing a soundproof wall in an elevated trafficway according to the present invention will be described below with reference to FIGS. 1 and 2.

As shown in Figures 1 and 2, on the side edge of the elevated traffic road 1,
The pillars 2 are raised and lowered at required intervals, and each bracket 3 connects one end of each platen [・3], which increases in length from the top to the bottom, from the top to the bottom of the outer surface of each pillar 2 at the required position. 2, and a frame 4 is fixed to the other end of each bracket 3, and each frame 4
A soundproof wall 6 is constructed by fixing a soundproof and radio wave reflecting metal @5 between the outer surfaces of the wall.

The length of each of the brackets 3 is determined by the outward and upward inclination angle of the frame 4 fixed to the other end of each bracket 3, and especially the outward and upward inclination of the plate surface of the metal plate 5 fixed between the outer surfaces of each frame 4. The length may be set so that the angle θ is 10' or more.

Basically, the inclination angle θ may be set at any angle as long as the direction of reflection is upward, but if θ is less than IO°, the effect will be small (,
Also, if θ is too large, the member ffi! In addition, the eccentric load to the outside increases, which is not economical.

Furthermore, if the lower part of the soundproof wall 6 constructed as described above is open, the view of the outer lower part of the elevated trafficway 1 will be poor, so as shown in FIGS. Also, brackets 7 are fixed diagonally downward and vertically, and a frame 8 curved with a radius of curvature is fixed to the llh end of each bracket 7 so as to be continuous with the lower end of the frame 4. A metal Fi 9 is fixed between the outer surfaces of each frame 8 so as to be continuous with the metal plate 5.

Furthermore, it is said that the vertical width of the plate surface of the metal@5 whose plate surface is set at an outwardly upward inclination angle of 10° or more needs to be at least 2 to 3 times the wavelength of the television radio wave. Ori,
The wavelength of VHF band TV radio waves is approximately 3.3m to 1.5m, U
Since the wavelength of HFHF-V radio waves is approximately 65 cm to 40 cm, the vertical width of the surface of the metal plate 5 necessary to prevent reflection failure of VHF band TV radio waves is at least 3 m, and the U
The vertical width of the metal plate 5 required to prevent reflection failure of HFHF-TV radio waves is approximately 0.8 m or more, so in practice, the metal plate 5 should be designed so that it can be used for both TV radio waves.
The vertical width of the board surface shall be at least 3m.

"Effects of the Invention" As described above, the present invention provides a gold r By installing it like this,
Since the TV radio waves incident on the metal plate can be reflected outward and upward, it is possible to prevent interference with the reflection of TV radio waves (ghost phenomenon) on a TV set in a private house or the like.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the method of installing a soundproof wall in an elevated trafficway according to the present invention, and FIG. 2 is a schematic diagram of one side of the elevated trafficway, and FIG. It is. l...Elevated traffic road, 2...Strut, 3...Bracket, 4...Frame, 5...1 metal plate for soundproofing and radio wave reflection Figure 1 Figure 2 ?

Claims (1)

[Claims] (1) As a soundproof wall for an elevated transportation road, a metal plate with a vertical width of 3 m or more is installed so that the plate surface has an outward and upward slope of 10° or more. How to install soundproof walls in.