FI92342C - noise Fences - Google Patents

Description

1 92342

The present invention relates to a noise barrier, and in particular to a noise-absorbing fence panel, consisting of surface plates and a filling of mineral wool or similar material between them, wherein at least

10

The Finnish building data card RT X70-33887 describes a well-known noise barrier structure consisting of column elements and metal wool-filled panel elements filled with metal plate shells placed between the columns. Inherently, such a fence reflects back the traffic noise on it. Usually, the shell of the traffic side noise barrier panel is perforated, whereby the mineral wool inside the panel absorbs noise. The fence panel is made to be very corrosion resistant. Traditionally, the mineral wool 20 inside the panel is allowed to get wet and dry with weather variations. Apparently, at least in some noise situations, wetted mineral wool dampens better than dry due to its higher mass.

Although the noise barrier panel described above works and withstands well in warm-25 dark climates, its durability is threatened by freezing, especially in the conditions of Finland and cold countries in general. The water that has fallen inside the panel through the perforation freezes as the ice freezes and it is known that the water expands as it freezes. Wet, frozen mineral wool expands and bulges the fence-30 panel. When, under suitable conditions, the layer inside the surface of the panel melts and re-freezes again, the freezing loads the panel even more and can even break the panel element. Mineral wool can also crumble over time as it freezes and thaws alternately.

35

It has now come to the conclusion that in the Finnish climate, the barrier panel will be allowed to dry on the inside and even when wet.

2,92342

The object of the invention is thus to provide a noise barrier panel, which dries on the inside as soon as possible after wetting, and in which the wetting of the mineral wool filling would be slow.

To achieve this, the noise barrier panel according to the invention is characterized by what is defined in the characterizing part of claim 1.

An essential advantage of the invention is that the mineral wool board 10 or the like inside the noise barrier panel remains dry or at least relatively dry, whereby no problems or damage due to freezing occur.

The invention will now be described with reference to the accompanying drawings.

Figure 1 shows an axonometric view of a noise barrier panel according to the invention from the panel.

Fig. 2 shows the arrangement of the noise barrier panels in the support columns from above in the direction I of Fig. 1.

The object of the invention described above is achieved when the water entering through the perforation 3 is allowed to drain into the empty collector space 6 arranged in the lower part 5 of the fence panel 1 and out of the openings 7 in the panel. Mineral wool The collection space free of the sample 4 9 can in principle be arranged in many ways by preventing the mineral wool plate 4 from running against the lower edge 8 of the panel. The collector space is out of the mass of the element 30 and thus somewhat impairs the attenuation properties of the noise barrier panel, but in use this is irrelevant. The gap S next to the perforated surface 3 of the panel reduces the wetting of the mineral wool and increases the ventilation through the holes and the collection space, thus enhancing the drying.

35

According to the invention, the collector space 6 of the fence panel 1 is in particular formed of a perforated pipe, preferably commercially. plastic drainage pipe. Such a 3 92342 drainage plastic pipe is cheap as well as pre-grooved and perforated. This perforated tube is placed in the lower part 5 of the panel resting on the base 8 of the panel. The perforated plastic tube forming the collector space 6 generally extends over the entire length L of the panel 5 at least quite close to the ends of the panel, which are generally indicated by reference numerals 9a, 9b. Dewatering between the metal shells 2 and 3 of the fence panel can be arranged also in the middle of the panel, but it is advantageous to place drainage holes 7 in the lower corners of the panel ends 9a, 9b. in which case water flows into the column without staining the outer sides 2, 3 of the panel. that the base 8 is straight in the transverse direction, arranges the perforations to prevent water from flowing out directly and to direct the water to the ends of the panel. The water drainage holes 7 at the ends of the panel 20 can be either at the end of the pipes forming the collecting space 6 or at the bottom of a possible end plate of the panel 1, not shown in the figures.

Preferably, the surface plates 2, 3 of the fence panel are made of metal and in particular of plastic-coated steel sheet. As a result, preferably the plate parts 12 left by the perforation of the holes 13 in the perforation panel 1 can be left attached to the perforated surface plate 3 and made to point inside the panel, i.e. towards the second surface plate 2. In this case, the plate parts 12 30 keep the mineral wool filling 4 at a small distance S from the surface plate, whereby the ventilation of the interior of the panel is improved.

Instead of mineral wool, it is of course possible to use another material which dampens the sound and which can withstand the conditions in question.

The efficiency and functionality of the invention are increased by wind conditions. The pressure of the wind blowing against the fence drives the air 92342 4 through the perforation 13 through the mineral wool 4 into the collecting pipe 6, whereby the element is ventilated to dryness.

i

Claims (6)

A noise bar panel consisting of cladding discs (2, 3. and filling (4) of mineral wool or similar material therebetween), at least the cladding disc (3) which is perforated against the noise rise is perforated, characterized in that in the lower part ( 5) a perforated collector tube (6) or the like is provided in the longitudinal direction of the panel between the cladding discs (2, 3) of the rod panel (1), which keeps the lower part free of said filling and rests on the bottom (8) of the rod panel (1). , for collecting water, and openings (7) in the spirits (9a, 9b) of the rod panel (1) for discharging water from the lower portion of the panel (1). Noise bar panel according to claim 1, characterized in that the bottom (8) of the panel and the lower edge of at least one cladding disc (2 or 3) are operated on a small vertical strip (H) from the bottom (8) upwards. Noise bar panel according to claim 2, characterized in that the water is conducted through the water outlets (7) in the spirits of the rod panel (1) to a notch-like space (11) in the rod columns (10) surrounding the spirits (9a, 9b) of the panels. Noise bar panel according to claim 1, characterized in that at least the perforated cladding disc (3) is a metal disc, in which the disc fragment (12) bends through the holes (13) and preferably through the perforations towards the opposite cladding disc (2). (4) at a distance (S) from the perforated lining sheet and simultaneously promote ventilation around and through the filling and drying. 5. Noise bar panel according to claim 1, characterized in that the perforated pipe constituting collector space (6) is an inherently known plastic fogging pipe. in!