DE9218223U1 - Module for a noise protection wall and noise protection wall made up of modules - Google Patents

Description

Applicant:

July 23, 1993

JMH Bosch Noise Protection GmbH 123OGlOl

Dammstrasse 3
71409 Schwaikheim

Representative:

Witte, Weller, Gahlert & Otten
Patent attorneys
Augustenstrasse 14
70178 Stuttgart

Module for a noise barrier and modules constructed Noise barrier

The invention relates to a module for a noise barrier constructed from several modules, each module having hollow chambers between its top and bottom, and the top and bottom being profiled to match each other in such a way that the modules are stackable.

The invention further relates to a noise barrier constructed from modules.

Such modules and noise barriers are known from practice.

Such noise barriers are used on busy roads to protect residential areas behind them from street noise. These noise barriers are also used in industrial buildings to soundproof administrative areas from production areas. In general, such noise barriers are used when there are outdoor noise sources from which other areas need to be soundproofed. This means that these noise barriers are also used for soundproofing between residential areas and play and sports areas.

Depending on the strength of the noise source to be isolated, different requirements must be met for sound insulation. Sometimes low attenuation values in the range of 4 to 8 dB are sufficient, while sometimes very high attenuation values of over 8 dB are required.

As a result of spatial planning programs, technical restructuring or production relocations, it can happen that the sound insulation of existing noise barriers is no longer sufficient over time. It often happens that a road that was initially only used by cars is expanded into a bypass road that is now also used by heavy goods vehicles. The initially rather low noise level of car traffic is now increased by heavy goods vehicles to such an extent that increased noise protection measures have to be taken. It would therefore be desirable if an existing

Noise barrier could be retrofitted to higher attenuation values without the work and investment costs becoming too great.

In addition to all these requirements, it must also be remembered that the noise barriers must be aligned with the source of the noise, so that they may have to withstand very unfavourable weather conditions. Due to the interplay of sun, rain and frost, the static requirements for noise barriers are particularly high.

The known modules for building noise barriers mentioned at the beginning only partially meet these requirements. For example, these modules are equipped with hollow chambers that extend between cross braces to save weight. Furthermore, the known module only has a rear side with longitudinal ribs; the front side is open and allows a view of the stiffening ribs. In the area of the front side, the module has a longitudinal groove into which insulation mats and visible panels are inserted for sound insulation.

In order to enable the known modules to be stacked on top of each other, they have a roof with a curved cross-section, to which the respective underside of the module to be arranged above is adapted in shape.

The known modules now have problems with regard to both static strength and noise insulation. One disadvantage is that the modules themselves do not offer any noise protection, but must always be fitted with insulation mats and visible cladding. If the sound-insulating effect of these modules does not decrease over time,

is no longer sufficient, the existing noise barrier must be demolished and a new noise barrier built. This entails considerable costs.

Because of the roof-like design of the top, the stability of the known modules is often not sufficient. In particular, with high noise barriers that consist of many modules arranged one above the other, the lower module cannot always bear the weight of the one above it; instead, it will deform. This is due, among other things, to the fact that the force is only introduced into the struts of the module at a point due to the roof-like design. Since the struts are anchored to the back, when a large force is introduced, the struts running diagonally to the back often cause the back to bulge outwards. On the other hand, it is possible that the struts find a way out into the open front and bend the insulation material and the safety cladding. All of this not only leads to an undesirable impairment of the visual effect of the noise barrier, the cracks that arise as a result of the deformation also impair the insulating properties of the noise barrier and also lead to premature aging.

Based on this, the object of the present invention is to create a module of the type mentioned at the beginning and noise barriers constructed from it, in which the disadvantages mentioned above are avoided. In particular, the noise barrier should have greater static stability and at the same time better sound insulation properties while being easy to assemble, whereby the modules should be easy to manufacture and can be used variably. Furthermore, the wall should be able to be retrofitted to higher sound insulation values.

With regard to the modules mentioned above, this task is solved by filling the hollow chambers with insulating material.

The problem underlying the invention is completely solved in this way. Because the hollow chambers themselves can now be filled with insulating material, the modules themselves already have a very high noise insulation value. If the hollow chambers are filled with insulating material, the stability of the modules is also
larger, they cannot deform as easily. The insulating material has a relatively high density and has a certain resistance to deformation.

The modules are also very easy to handle, as to build a noise barrier, all you need to do is arrange identical modules next to each other and stack them on top of each other. Since the modules themselves already have a high noise insulation value, there is no need for externally attached insulation mats and therefore no need for visible cladding.

With regard to the noise barrier mentioned at the beginning, the above task is solved by the fact that it can be provided with a noise insulation device on one or both sides by means of holding devices that can also be subsequently mounted on the modules.

This also completely solves the problem underlying the invention, because an existing noise barrier can now be retrofitted either on one side or even on both sides with a noise insulation device, such as one made of foam mats and visible cladding. If the sound insulation value of the existing noise barrier is no longer sufficient, it can be increased without the entire noise barrier having to be replaced.

In particular, if the new noise barrier is constructed from the new modules, it already has a very high noise insulation value without any additional noise insulation devices, so that for noise sources with a low noise level, the installation of external noise insulation devices is not necessary. Since the new modules themselves are very stable, the static conditions that apply to the noise barrier are also sufficiently met, which guarantees a long service life.

In one embodiment, it is preferred if the hollow chambers are closable, preferably hermetically closable.

This measure has the advantage that once the hollow chambers have been filled and closed, no more moisture can penetrate into the interior of the modules, so that the decomposition processes associated with water ingress are avoided. While in the modules known from the state of the art, the hollow spaces are only protected by the insulation mats and the visible cladding, and are therefore only inadequately protected against water ingress, in the new modules water ingress is almost impossible. This not only increases stability but also the service life. Furthermore, it is no longer so easy for the wall to bend mechanically, which is always associated with impairments in the sound insulation value.

Furthermore, it is preferred if a module with a substantially flat and self-contained rear side also has a substantially flat and self-contained front side.

The advantage of this measure is that the forces caused by the weight of the upper modules are evenly distributed between the front and the back

and are discharged more or less vertically into the ground. The resulting greater stability of the modules allows for greater stacking heights and thus higher noise barriers. Furthermore, the modules can better withstand the mechanical stresses caused by wind and rain, so that they do not "lose their shape" so easily, which would always have an adverse effect on the noise insulation value.

In a further development, it is preferred if cross stiffeners are provided in the hollow chambers.

As is well known, this measure has the advantage that the hollow chambers are additionally provided with an element that increases mechanical rigidity. As already mentioned, the higher mechanical rigidity not only leads to a longer service life but also to the fact that the noise insulation value does not decrease over time.

If the hollow chambers run in the longitudinal direction and have a closable filling opening on at least one end face, this is preferably done for filling and, due to the end walls, for short-term stability.

Here it is preferred if the modules are made of plastic, preferably from recycled plastic.

The advantage here is that the modules themselves are very light, so that they can be stacked without the lower modules having to bear too much weight. On the other hand, the recycled plastic in particular is so strong that large forces can be transferred via the lower module into the ground without the module itself being damaged.

In a further development, it is preferred if the modules have essentially flat support surfaces on the top and bottom, which run approximately horizontally when the module is installed.

The advantage here is that the upper modules rest very evenly on the lower modules, so that the forces are evenly distributed in the lower modules. While the roof-shaped upper side of the state-of-the-art technology allows for point-based force introduction with the resulting deformation, this is no longer possible here due to the flat support surfaces. This measure also leads to greater stability and thus to better long-term noise insulation values.

In this embodiment, it is further preferred if the top and bottom have at least two flat support surfaces and, in the case of stacked modules, there are free spaces between the top and bottom sides lying on top of one another.

This measure has the advantage that the modules have a certain amount of room for thermal expansion, so that even in strong sunlight, tensions between individual modules that lead to cracks do not occur. On the other hand, these free spaces can be used to subsequently slide holding devices for external insulation material between the modules, so that the noise insulation value can also be subsequently increased.

Furthermore, it is preferred if the upper side has a raised central support surface and at least one lower outer support surface, and if the lower side has a recessed central support surface and at least one projecting outer support surface.

This measure is particularly advantageous from a static point of view, because due to the offset support surfaces, the modules stacked on top of each other cannot be moved against each other in the transverse direction.

In general, it is preferred if longitudinal ribs are provided at least on the front or back.

The advantage of this well-known measure is that climbing plants can climb up the longitudinal ribs, so that the noise barrier can be overgrown by plants on one or both sides, which not only increases the noise insulation value, but also ensures an attractive appearance at the same time.

Furthermore, it is preferred if the module is assigned a holding device for externally attachable insulation devices that is independent of the module itself.

The advantage here is that the module can initially be manufactured without such a holding device, because - as mentioned at the beginning - the module itself already has a sufficient noise insulation value. While in the current state of the art the holding device is always already connected to the module - which makes sense because the module itself cannot have a noise insulation effect - the new module can be manufactured without this holding device, which not only simplifies production but also makes it less expensive. In addition, the new modules have a more pleasing appearance. However, using the separate holding devices, noise insulation devices can still be attached later, so that the noise insulation value of the modules can still be increased even after the noise barrier has already been installed.

With regard to the new noise barrier, it is preferred if the holding devices, when installed, extend laterally beyond the modules in at least one direction.

In this advantageous way, the noise insulation devices can be mounted on the noise barriers from the outside, after only the retaining devices have been pushed between the modules. This guarantees easy installation.

Furthermore, it is preferred here if the mounted holding devices are arranged between two modules stacked on top of each other.

The advantage here is that the holding device only has to be placed between two modules in order to connect them to the noise barrier. Complicated assembly work is not required. To retrofit an existing noise barrier, the modules only have to be lifted one after the other and the corresponding holding devices pushed in between before the additional noise insulation devices can be installed from the outside. This obviously has significant advantages over completely demolishing and rebuilding a noise barrier. Although the individual modules can be so heavy that cranes or other lifting devices have to be used, the use of materials and working time is significantly less here than with state-of-the-art noise barriers, which would have to be completely replaced in order to increase the noise insulation value.

Furthermore, it is preferred if the holding devices have holding plates which are adapted in cross-section to the profiling of the upper and lower sides, so that they are held essentially immobile in a direction transverse to the front and rear sides.

The advantage here is that no further screwing work is actually required; it may be sufficient to place the holding devices between two modules, as the holding device is then already held immovably at the side.

Furthermore, it is preferred here if the holding plates have T-shaped fastening projections on their ends protruding over the modules, to which at least insulating material or visible cladding can be fastened.

These protruding ends, which can protrude over the noise barrier on either one or both sides (depending on whether one or two additional noise insulation devices are to be installed), have the advantage, due to their T-shaped fastening projections, that the noise insulation devices can either be screwed onto them or otherwise fastened, or they can be pushed behind the T-projections. The installation of the noise insulation device to be installed can therefore be based on the respective circumstances.

Further advantages arise from the description and the attached drawing.

It is understood that the features mentioned above and those to be explained below are not only available in the combinations specified, but also in other combinations

or can be used alone without departing from the scope of the present invention.

An embodiment of the invention is shown in the drawing and is explained in more detail in the following description. They show:

Fig. 1 shows a schematic side view of a new noise barrier comprising three sections with different noise insulation values;

Fig. 2 shows a partial cross-section through the noise barrier according to Fig. 1 along the line II-II;

Fig. 3 a partial cross-section through the noise barrier from Fig. 1 along the line III-III; and

Fig. 4 shows a partial cross-section through the noise barrier from Fig. 1 along the line IV-IV.

In Fig. 1, 1 denotes a noise barrier which comprises a central section 10 which is made up of modules 12 arranged one above the other at a height of 11. The modules 12, which are identical to one another, lie on top of one another in a support plane 13 and do not have any further external noise insulation device since - as will be described below - they themselves have a sufficient noise insulation value.

Longitudinal ribs 14 are indicated on the modules, which take into account the needs of climbing plants.

A left section 17 and a right section 18 adjoin the middle section 10 in the longitudinal direction 16 at schematically indicated seams 15. The two outer sections 17 and 18 are also made up of modules 12, but additionally have a noise insulation device 19. It should be noted here that noise barriers are generally provided with or without a noise insulation device 19. The juxtaposition of three different sections in Fig. 1 is chosen purely for illustration purposes.

The noise insulation device 19 comprises a visible panel 21, which is provided for optical reasons, among other things. Open areas or recesses 22 are provided in the visible panel 21, which allow a view of the insulation mats 23. As will be described in more detail, the insulation mats 23 are arranged between the modules 12 and the visible panel 21.

The noise insulation value of the individual sections is determined, among other things, by the ratio of open areas 22 to the total area, because only the sound that actually reaches the insulation mats 23 can be absorbed.

The two outer sections 17 and 18 differ from each other in particular in the way the noise insulation device 19 is attached to the modules 12. While the right-hand section 18 has 16 continuous holding devices 24 with an external holding part 25 in the longitudinal direction, the left-hand section 17 has 16 holding devices 26 provided in sections in the longitudinal direction with internal holding parts 27. While the insulation mats 23 and the visible panel 21 are pushed or clamped behind the external holding parts 25 in the case of the right-hand section 18, they are

left section 17 is attached to the inner holding parts 27 by means of fastening elements 28, such as screws or rivets.

Fig. 2 shows a partial cross section along the line II-II through the middle section 10 of the noise barrier 1 from Fig. 1.

It can be seen that each individual module (12) has a substantially rectangular shape in cross-section and comprises a cross reinforcement 30 in its hollow interior 29. The module 12 itself is relatively thin-walled and made from recycled plastic or another suitable plastic. To increase the strength, a horizontal transverse wall 31 is provided, which divides the interior 29 into an upper hollow chamber 32 and a lower hollow chamber 33. Diagonal transverse walls 34 are also provided, which extend between a flat front side 35 and a parallel, also flat rear side 36. It can be seen in the cross-section that both the front side 35 and the rear side 36 are provided with the longitudinal ribs 14, which in the example shown are trapezoidal profile grooves.

Furthermore, the module 12 has a top side 37 and a bottom side 38, which run essentially parallel to the transverse wall 31. A metal plate 39 is arranged on the transverse wall 31 to further increase stability, which is subsequently inserted into the modules.

At 41, insulating material is also indicated with which the cavities 32 and 33 are filled. For this purpose, a closable opening 42 is provided in a front wall of the module 12 indicated at 43. The

Hollow core tuner 32 is completely filled with dielectric material in such a way that the module 12 has a high noise insulation value. Parallel to the end wall 43, another end wall is provided, which cannot be shown in the sectional view. While the end wall 43 in Fig. 1 is on the right in the area of the seam 15', the end wall not shown in Fig. 1 is on the left in the area of the seam 15''.

In the second end wall, for example, an opening is provided for filling the lower hollow chamber 33 with insulation material 41.

In order to enable the stacking of modules 12, the module shown has a nose 44 with a central flat support surface 45 on its upper side 37. On both sides of the nose 44, deeper outer support surfaces 46 are provided, which run parallel to the support surface 45.

The underside 38 of the module 12 is also profiled in a corresponding manner. The underside has an indentation 47 with a recessed central lower support surface 48 and projecting outer support surfaces 49 arranged on both sides of it. When a module 12 is assembled, all support surfaces 44, 46, 48, 49 run approximately horizontally, so that an even transfer of force from the upper to the lower modules is ensured. This force is introduced into the front 3 5 and the rear 3 6, which run essentially vertically and thus pass the force on downwards. Twisting of the module 12 is prevented by the transverse stiffener 30, to which the inserted metal plate 39 also contributes.

In Fig. 2 it can also be seen that when the top and bottom sides 37, 38 are placed on top of each other, free spaces 51 appear between them on both sides of the nose 44. These free spaces 51 arise because the transition between the central support surface 45 and the outer support surfaces 46 on the top side 37 differs from that provided between the central support surface 48 and the outer support surfaces 49 on the bottom side 38. These free spaces 51 allow, for example, an expansion of the modules as a result of very strong solar radiation.

Fig. 3 shows a cross section through the right section 18 of the noise barrier 1 from Fig. 1. It can be seen first of all that a cross reinforcement 30 with crossing ribs is provided in the interior 29 of the module 12. This cross reinforcement 30' can be used instead of the cross reinforcement 30 from Fig. 2. The stability of the module 12 is thereby increased even further. Otherwise, the module 12 corresponds to that shown in Fig. 2.

While the noise barrier according to Fig. 2 already has a high noise insulation value, section 18 has an even higher noise insulation value due to the additional noise insulation device 19.

In Fig. 3 it can be seen that the continuous holding device 24 is arranged between the underside 38 and the top 37 of the two modules 12 arranged on top of one another. The holding device 24 comprises a holding plate 54 which is partially Ω-shaped in the transverse direction 52 and is preferably made of aluminum. The holding plate 54 is adapted to the profile of the top 37 and the underside 38 in such a way that it completely fills the free space 51. The modules 12 are now again

held immovably against each other, whereby the holding plate 54 cannot be moved in the transverse direction 52. Due to the weight of the filled modules 12 resting on each other, the holding plate 54 is securely and firmly clamped between the modules.

The holding plate 54 protrudes on one side with its end 56 to the front (on the right in Fig. 3) over the modules 12 and there merges into a T-shaped fastening projection 57. The continuous external holding part 25 is provided on this T-shaped fastening projection 57. The insulation mat 23 and the visible panel 21 are clamped between the front 35 and the holding part 25, which for this purpose has a cranked area 58 under tension, which engages in a groove 59 that forms between the holding part 25 and the front 35.

It can be seen that the T-shaped fastening projection 57 is formed symmetrically to the support plane 13, so that both a downwardly open groove 59'' and an upwardly open groove 59' are formed.

As can be seen from Fig. 3 in conjunction with Fig. 1, the insulation mat 23 and the visible panel 21 are guided at the top and bottom between two holding parts 25, so that the noise insulation device 19 is held in place as a whole.

While in Fig. 3 the noise barrier 1 is only provided with a noise insulation device 19 on one side, Fig. 4 shows a noise barrier provided with a noise insulation device 19 on both sides, namely section 17 from Fig. 1, in cross section. The modules 12 here correspond to the modules 12 shown in Fig. 3.

As already mentioned, the noise insulation value of section 18 is already greater than that of section 10, but due to the double noise insulation device 19, the noise insulation value of the left section 17 of the noise barrier 1 is increased again.

From Fig. 4 it can be seen that the holding plate 54 is profiled in cross section essentially as in Fig. 3, but has two protruding ends 56, each with a T-shaped fastening projection 57.

Now, in contrast to Fig. 3, in Fig. 4 the retaining plate is not provided in the longitudinal direction 16, but only in sections. The retaining plate 54 accordingly has the shape of a double-cranked flat iron 61 with two T-shaped ends 62, to each of which the noise insulation devices 19 are attached.

As shown in the cross-section in Fig. 4, the insulation mats 23 engage in the channels 59, while the visible panels 21 with their bent areas 58 overlap the outside of the holding parts 27 and are attached to them by means of suitable fastening elements 28.

Of course, even if the holding parts 61 are only provided in sections, both the insulation mat 23 and the visible cladding 21 can engage in the channel 59, while it is also possible to fasten the visible cladding 21 to the holding parts 25 from the outside in the case of continuous holding plates 54.

Claims (17)

Protection claims 1. Module for a noise barrier (1) constructed from several modules (12), each module (12) having hollow chambers (32, 33) between its top side (37) and its bottom side (38), and the top side (37) and the bottom side (38) are profiled to match one another in such a way that the modules (12) are stackable, characterized in that the hollow chambers (32, 33) can be filled with insulating material (41). 2. Module according to claim 1, characterized in that the hollow chambers (32, 33) are closable, preferably hermetically closable. 3. Module according to claim 1 or 2, with a substantially flat and self-contained rear side (36), characterized in that the module (12) has a substantially flat and self-contained front side (35). 4. Module according to one of claims 1 to 3, characterized in that cross stiffeners (30) are provided in the hollow chambers (32, 33). 5. Module according to one of claims 2 to 4, characterized in that the hollow chambers (32, 33) run in the longitudinal direction (16) and have a closable filling opening (42) on at least one of their end walls (43). 6. Module according to one of claims 1 to 5, characterized in that it is made of plastic, preferably recycled plastic. 7. Module according to one of claims 1 to 6, characterized in that substantially flat support surfaces (45, 46; 48, 49) are provided on the upper side (37) and the lower side (38), which extend approximately horizontally when the module (12) is installed. 8. Module according to claim 7, characterized in that the upper side (37) and the lower side (38) have at least two flat support surfaces (45, 46; 48, 49), and that when the module (12) is stacked, free spaces (51) remain between the upper and lower sides (37, 38) lying on top of one another. 9. Module according to claim 7 or 8, characterized in that the upper side (37) has a raised central support surface (45) and at least one lower outer support surface (46), and that the lower side (38) has a recessed central support surface (48) and at least one projecting outer support surface (49). 10. Module according to one of claims 3 to 9, characterized in that longitudinal ribs (14) are provided at least on the front or rear side (35, 36). 11. Module according to one of claims 3 to 10, characterized in that it is assigned a holding device (24, 26) for externally attachable noise insulation devices (19) which is independent of the module (12) itself. 12. Noise barrier constructed from modules (12), characterized in that it can be provided with a noise insulation device (19) on one or both sides by means of a holding device (24; 26) that can also be subsequently mounted on the modules (12). 13. Noise barrier according to claim 12, characterized in that it is constructed from modules (12) according to one of claims 1 to 11. 14. Noise barrier according to claim 12 or 13, characterized in that the holding devices (24; 26) extend laterally beyond the modules (12) in at least one direction (52) in the assembled state. 15. Noise barrier according to one of claims 12 to 14, characterized in that the mounted holding devices (24; 26) are arranged between two modules (12) stacked one above the other. 16. Noise barrier according to claim 15, characterized in that the holding device (24; 26) has holding plates (54, 61) which are adapted in cross section to the profiling of the upper and lower sides (37, 38) so that they are held essentially immobile in a direction (52) transverse to the front and rear sides (35, 36). 17. Noise barrier according to claim 16, characterized in that the holding plates (54, 61) have T-shaped fastening projections (57, 62) on their ends (56) projecting beyond the modules (12), to which at least insulating material (23) or visible cladding (21) can be fastened.