DE102021132977A1 - Noise protection wall with soundproofing elements and improved sound absorption - Google Patents

Abstract

Noise protection wall (1, 1a, 1b) with improved sound absorption consisting of a hard wall (2), preferably made of concrete and/or hollow blocks or the like, and a facing shell (3) placed in front of the hard wall (2) and consisting of parallel and upright column bodies (4, 4a, 4b, 4c) which are filled with a filling material (17), the column bodies (4, 4a, 4b, 4c) being arranged at such a distance (47) in front of the hard wall (2). that in the space between the front side (46) of the hard wall (2) and the outer circumference of the column body (4, 4a, 4b, 4c) closest to the hard wall (2) there is a sound-reflecting and/or sound-absorbing space (16 ) is arranged.

Description

The subject matter of the invention is a noise protection wall with improved sound absorption according to the preamble of patent claim 1.

A noise barrier of the type mentioned, for example, with the subject of DE 10 2007 044 017 A1 become known in which several gabion bodies are mounted in front of a hard wall, which consists of hollow blocks, which have an approximately semicircular cross-section, consist of a wire mesh and are filled with a suitable filling material. The semi-circular profiled gabions are hung with a few straps - spanning the diameter - in assigned grooves on the front of the hard wall and are therefore directly and sound-transmittingly connected to the hard wall via the fastening straps mentioned. In the space between the back of the gabions and the front of the hard wall, soundproofing absorption panels are arranged. The disadvantage of the noise protection wall mentioned is, however, that the wire baskets of the gabions are suspended from the front in the anchoring grooves of the hard wall on the noise protection wall, which requires a lot of installation work. In addition, there is direct sound transmission from the gabions via their front attachment to the front of the hard wall.

The hanging of the gabion baskets on the front side of the hard wall also leads to static load problems, which places high demands on the foundation of the hard wall in order to absorb the forward tipping loads of the gabion baskets.

In addition, the manufacturing cost of the known noise barrier is great, because the suspension of the gabion baskets in vertical grooves of the noise barrier requires special structural measures that require a special shape of the hollow blocks. It is therefore not possible to connect a hard wall cast from concrete with such gabion baskets.

With the DE 10 2014 009 533 A1 another noise protection wall has become known, which consists of stacked gabion baskets that are filled with a suitable filling material. The combination of a hard wall with gabions placed in front of it cannot be inferred from this publication.

The invention is therefore based on the object, a noise barrier according to the subject of DE 10 2007 044 017 A1 be further developed in such a way that a significantly improved sound absorption is guaranteed.

The invention is characterized by the technical teaching of claim 1 in order to solve the task at hand.

A feature of the invention is that a large number of pillar bodies are arranged at such a distance in front of the hard wall that a sound-reflecting and/or sound-absorbing space forming an air layer is formed in the space between the front side of the hard wall and the outer circumference of the pillar body closest to the hard wall.

The column bodies set up at a distance in front of the hard wall form a column body wall that is acoustically decoupled from the hard wall. Such a column body wall can also be designed as a wall made of palisades.

This achieves the advantage that there is no need for a sound and vibration-transmitting fastening connection between the column bodies, which are preferably designed as gabions, and that instead the column bodies are arranged free-standing and at a distance in front of the hard wall, so that there is a gap between the rear of the column body and the sound facing front side of the hard wall forms an air layer which has sound-reflecting and/or sound-absorbing properties in connection with the column bodies.

The term "pillar body" used in the present invention goes beyond the prior art term of a gabion.

Gabions are wire baskets filled with a suitable filling material. Such a technique can also be used in the present invention. However, the invention also provides for other column bodies in addition to the use of gabions, so that in the following description the generalizing term “column body” is used for all components that can be arranged in a column-like manner and at a close distance from one another in front of a hard wall.

Such pillar bodies can, for. B. also be plastic columns pressed from recycling material, which do not require a wire basket. Other column bodies that do not require wire baskets can also be used, e.g. B. made of wood palisades and the like free-standing body more that preferably have no attachment connection with the hard wall or - in exceptional cases - only head-side (upper side) tabs with which this column body row can be connected to the upper wall crown of the hard wall.

Where the term "gabion" is used in the following description, this is not to be understood in a limiting sense and for this reason the more general term "column body" has been used. Based on the use of gabions, an exemplary embodiment will be described in more detail below.

Conventional baffles or noise protection devices are based on the fact that sound waves are either caught by a hard or porous surface, with hard surfaces largely reflecting the sound, i.e. only deflecting it, whereas porous and also flexible materials, such as those in a bio-noise barrier, absorb the sound waves reflect at the same time.

With the noise protection device described below, it has been possible to capture at least directed sound waves with a significantly higher degree of efficiency and subsequently to absorb them.

The basic idea here is to capture sound waves and let them run dead in a largely closed system.

Two options are mentioned for this.

A.) A gabion noise barrier made from a parallel addition of gabions with different cross-section shapes and filling materials. Cylindrical gabions with a circular cross-section are preferably proposed, but alternatively gabions with an oval, rectangular or polygonal cross-section or mixed forms or parts thereof can also be used with a comparably high level of efficiency.

The arrangement of the gabions achieves its highest level of effectiveness when, when the gabions are set up in a plane-parallel manner, a mutual free space is maintained between the individual gabions in such a way that the sound waves reflected from the gabion surface hit neighboring gabions without being reflected back to the original sound source to become.

If this longitudinal free space is additionally provided with a so-called baffle plate in its central course, the desired sound absorbing effect is again significantly increased by directing the sound waves between the gabions directly into the depths of the gabion rear wall.

Gabions of this type will also not lie directly against the concrete wall arranged downstream of them, so that an additional free space is created between the concrete wall and gabion, as a result of which the rear side of the gabion, which faces the sound source, is also available as a sound absorption surface.

Compared to a continuously flat noise protection surface, gabion shapes used in this way triple the absorption surface against sound waves.

B.) The application of so-called 'sound catchers' on any walls, whereby the sound catchers used have the property that they oppose the incoming sound waves with a freely accessible opening into which the sound waves enter and through the special angular design of the sound catchers be prevented from being reflected directly from this wall.
Such “locked-in” sound waves are prevented from leaving the sound absorber, so that they run themselves dead in the sound absorber in the shortest possible time.

In the event that such sound absorbers are placed on a gabion-like wall or a porous surface (also bio noise protection wall), the effect of a conventional noise protection wall can also be significantly improved by such a retrofit.

The soundproofing device described above with reference to an exemplary embodiment using gabions can use gabions with different filling materials. For example, chunks of asphalt, rocks, diabase, plastic granulate or sandstone produced from milled road surface can be used as filling material. It should generally be a loose material that is resistant to grass or weed growth. Gravel can also be used in the usual way.

Another advantage of the measure that the column bodies are arranged as a sound-absorbing wall at a distance and forming an air layer in front of the hard wall is the fact that such a column body wall can now also be placed in front of existing hard walls at a distance, which means that a such a pillar body wall can be placed in front of existing building walls or in front of the walls of existing structures, preferably with an air gap of about 5 to 10 cm between the rear side of the pillar body wall and the front side of the hard wall.

If gabions made of wire mesh are used, the usual mesh sizes should be used and the bulk material should have a grain size of about 10 mm to 50 mm, to which the invention is not limited. It is only a preferred embodiment.

The advantage of the measure according to the invention is accordingly that the hard wall can consist of any concrete walls—including existing ones—and that mutual fastening between the column body wall and the hard wall is not important.

A further advantage of the measure according to the invention is that the column body wall can be brought to any installation site as a separate component and can be assembled there. A further advantage is that both the hard wall and the air gap in front of the pillar body wall with PV elements can be connected to PV elements both on the roof and the front in order to enable additional energy generation from sunlight via the PV elements .

In letter B of the description above, another noise protection device was described, which was referred to as a "baffle". This device is intended to enjoy protection either on its own or in combination with the noise barrier according to letter A of the present description.

Some properties of the sound absorbing device according to letter B of the above description are explained in more detail below.

The sound absorber device preferably consists of tubes arranged in rows and columns, open at the front towards the sound source and whose rear connection openings are flush with the front side of the noise protection wall.

The connection openings on the back can either connect to the front side of the column body wall, which is placed in front of the hard wall, or can also be placed directly on the front side of a hard wall, omitting the column body wall.

The second idea of the invention B is accordingly not dependent on the presence of a column body wall which is arranged at an air distance in front of the hard wall. However, it can also be hung on the front of the column body wall.

According to a preferred feature, the longitudinal axes of the tubes are aligned at an angle inclined downwards relative to a horizontal, and the tubes are generally hollow and preferably designed as rectangular or square tubes, so that they form a plane of sound-absorbing swallowing openings open to the sound source and after a preferred first feature, the sound-absorbing property of the matrix-like arranged, obliquely downward tube arrangement is based on the multiple deflection of the sound waves in the interior of the respective tube in the direction of the front side of the noise barrier.

According to a second sound-extinguishing mechanism, the sound-absorbing property of the matrix-like, obliquely downward-directed tube arrangement is based on an interference-based sound-extinguishing of the introduced sound path in connection with the backward sound reflected on the front side of the wall. The latter effect is a matter of resonance absorption, which means that the vibration energy of a signal source is taken over by a resonator oscillating at its natural frequency, with the vibration energy usually being converted into heat. The less the natural frequency of the resonator deviates from the frequency of the transmitter, the greater the energy transmitted (and thus extracted from the original signal).

In a preferred embodiment, each tube is approximately 40 to 60 cm in length and has square or rectangular openings with an edge length in the range of approximately 20 to 30 cm.

The downward inclined position of the tubes prevents soiling of the interior of the tubes on the one hand and on the other hand there is multiple sound reflection in the interior of the tubes when the sound is directed from the front, sound-absorbing intake opening via several reflection points in the direction of the adjoining noise protection wall becomes.

The subject matter of the present invention results not only from the subject matter of the individual patent claims, but also from the combination of the individual patent claims with one another.

All of the information and features disclosed in the documents, including the abstract, in particular the three-dimensional configuration shown in the drawings, could be claimed as being essential to the invention, insofar as they are new compared to the prior art, either individually or in combination. The use of the terms “essential lich” or “according to the invention” or “essential to the invention” is subjective and does not imply that the features so named must necessarily form part of one or more patent claims.

In the following, the invention is explained in more detail with reference to drawings showing only one embodiment. Further features and advantages of the invention that are essential to the invention emerge from the drawings and their description.

• 1: Stirnansicht einer Lärmschutzwand in einer ersten Ausführungsform Mit Darstellung von PV-Elementen
• 2: der Schnitt gemäß der Linie C-C in 1
• 3: der Schnitt gemäß der Linie A-A in 1
• 4: der Schnitt gemäß der Linie B-B in 1
• 5: die Draufsicht auf die Sichtseite einer Gabione mit Darstellung des Gitterwerks und des darin enthaltenen Füllmaterials
• 6: die schematisiert vergrößerte Darstellung als Ausschnitt aus der 3 oder 4
• 7: eine gegenüber 6 abgewandelte Ausführungsform
• 8: eine gegenüber den 6 und 7 abgewandelte Ausführungsform
• 9: eine gegenüber den 6 bis 8 abgewandelte Ausführungsform
• 10a: schematisiert eine Ausführungsform in Abwandlung der Ausführungsform nach 6 mit Darstellung weiterer Einzelheiten
• 10b: die schematisierte Darstellung des Schallauslöschungsmechanismus, der allen Ausführungen gemäß den 1 bis 12 zugrunde liegt
• 11: eine erste Ausführung der Montage von zwei gegenüberliegenden Lärmschutzwänden im Bereich einer von Fahrzeugen befahrenen Fahrbahn
• 12: ein gegenüber 11 abgewandeltes Ausführungsbeispiel, bei dem ein anderer Sonnenlauf für die Anordnung der PV-Elemente vorausgesetzt wird
• 13: der zweite Erfindungsgegenstand, der eine Schallfängervorrichtung darstellt, die vor einer Lärmschutzwand montiert ist
• 14: schematisiert einen Schnitt durch eine Röhre der Anordnung nach 13

Show it:

• 1 : Front view of a noise protection wall in a first embodiment, showing PV elements
• 2 : the cut according to the line CC in 1
• 3 : the cut according to the line AA in 1
• 4 : the cut according to line BB in 1
• 5 : Top view of the visible side of a gabion showing the latticework and the filling material it contains
• 6 : the schematized enlarged representation as a section from the 3 or 4
• 7 : one opposite 6 modified embodiment
• 8th : one opposite the 6 and 7 modified embodiment
• 9 : one opposite the 6 until 8th modified embodiment
• 10a : schematizes an embodiment modified from the embodiment shown in FIG 6 showing further details
• 10b : the schematic representation of the sound cancellation mechanism, which all versions according to the 1 until 12 underlying
• 11 : a first execution of the installation of two opposing noise barriers in the area of a roadway used by vehicles
• 12 : a opposite 11 modified embodiment in which a different course of the sun is assumed for the arrangement of the PV elements
• 13 : the second subject of the invention, which is a sound absorbing device mounted in front of a noise barrier
• 14 : schematizes a section through a tube according to the arrangement 13

1 shows a noise protection wall 1 in a front view in a schematic representation, with section CC in 2 a facing shell 3 consisting of columnar bodies 4 stands in front of a hard wall 2, forming an air-filled spacing space 16, which can be cast as a concrete wall, for example. This hard wall can also be made from an existing building wall or from a concrete wall in public space, e.g. B. a bridge pier, a tunnel wall or the like more. The noise protection wall 1 consists of wall modules that can be connected to one another at the edges. In an exemplary embodiment, in the 1 until 4 The wall module shown is 4 meters wide and 3 meters high. These dimensions can be changed within wide limits. The dimensions of the components specified here and later are therefore only to be understood as size specifications that are preferably used.

The column body wall that is freestanding in front of the hard wall 2 has approximately the same dimensions. The column bodies 4 have a preferred diameter in the range from 30 to 120 cm.

In the first embodiment shown, the column body 4 consists of a number of parallel, vertically aligned and a mutual horizontal distance between them forming gabions, the distance in the 6ff also referred to as clearance 51.

The two elements (hard wall 2 and facing shell 3) existing noise barrier 1 is occupied with a number of photovoltaic elements, in the embodiment according to 1 and 2 a number of PV elements form a PV pediment 7 on the crown of the noise barrier 1.

The drawings do not show how the noise barrier 1 is anchored to the ground 6 with anchoring means. It is also not shown that brackets on the crown side can be present, which can connect the upper sides of the column bodies 4 to the wall crown of the hard wall 2 . Such connections can also be equipped with sound and vibration dampers.

On the sides of the noise barrier element, as shown in 1 is shown, connection carriers 14 are still present in order to connect the noise protection wall element with further, adjoining noise protection wall elements in a form-fitting and sealed manner.

the 2 also shows that there is a dividing plate as a division 8 between the front facing shell 3 and the hard wall 2 can be, which penetrates both components at an angle. A piecemeal mechanical connection between the column body wall and the hard wall can thus be established.

There may be other PV elements in the form of the PV brackets 9, 10 shown in the drawings.

Another optional variant is in 1 and 4 shown that the noise protection wall 1 consisting of the two wall elements 2, 3 can also have a PV window 11 breaking through the wall, which is preferably made of transparent glass or plastic, on which a number of PV elements 12 are arranged in a matrix in the form of rows and Columns are arranged.

A window sill 13 can also be assigned to the PV window 11 .

In the embodiment according to 1 until 4 it is assumed that the column bodies 4 are designed as gabions 5 filled with filling material 17 , with a wire mesh 24 having a specific mesh size 25 being selected such that the filling material cannot fall out of the wire mesh 24 .

As indicated in the general description, however, it is not necessary for the solution that the columnar body 4 is designed as a columnar gabion 5 in accordance with 5 are trained. The column body 4 can also be designed as independent columns that are designed to be free-standing without wire mesh 24, such as, for. B. in the form of pillar elements pressed from plastic granules, pillar elements made of recycled material made of wood palisades and the like.

the 6 until 10b show different types and shapes of column bodies 4, where - for better clarity of the drawing - reference numbers have been entered in some drawings that are missing in the other drawings. However, it is pointed out that the same reference numbers apply to all the same parts and, accordingly, the same explanations.

In the 6 until 10b is in contrast to the embodiment according to the 1 until 5 provided that the sound-facing front 46 of the hard wall 2 is smooth and flat, while in the embodiment according to 1 until 4 it is assumed that the front side 46 of the hard wall 2 is provided with a semicircular profile 48 . The radius of curvature of the semi-circular profiles 48 lying next to one another is adapted to the outer circumference of the column bodies 4 partially engaging in the semi-circular profile 48 , so that an air space 16 encircling over approximately 180° results on the outer circumference of the column bodies 4 .

Thus, the effective and sound-absorbing surface of the space 16 is significantly increased because the formation of the semi-circular profile 48 in the front side 46 of the hard wall 2 creates a shell-shaped space 16 with a constant thickness (thickness), while in the embodiments according to 6 until 10b such a semi-circular profile 48 is missing in the front side 46 of the hard wall 2 and therefore a space 16 narrowing conically in the direction of the hard wall 2 is given, as is the case in FIG 6 is shown.

For better sound guidance and especially for improved guidance of the reflection sound, on the basis of the 10b is discussed, a two-legged guide plate 15 is arranged in the space between adjacent column bodies 4, which is straight with its central leg and engages in the space between the adjacent column bodies 4, while the forked rear legs with associated anchorages 19 on the front side 46 of the hard wall 2 are attached.

In the 6 until 10b only the type of filling material 17 is indicated and only partially drawn. In practice, all of the column bodies 4, 4a, 4b, 4c shown are filled with the filling material 17 completely and space-fillingly.

In the embodiment after 6 the pillar bodies 4 are designed to be round-cylindrical, as a result of which the wire basket mesh 18 is completely round and self-contained. The outer profile 49 is therefore circular.

How out 6 As can be seen - and as can be seen from all the other drawings - the column bodies 4 are arranged at a free distance 47 in front of the front side 46 of the hard wall 2, so that on the rear circumference of the column body 4, which faces the front side 46 of the hard wall 2, the previously described sound-reflecting and sound-absorbing air space in the manner of the air-filled spacing space 16 results.

The only difference they show 7 until 9 other cross-sectional shapes of column bodies. the 7 shows oval profiled column body 4a; the 8th shows square profiled column body 4b, which are set up in the form of rhombuses and the embodiment 9 shows hexagonal column bodies 4c.

From the representation of 6 until 9 It follows that the column bodies 4 can have relatively any shape and it is preferred if the column bodies are set up at a distance 47 in front of the front side 46 of the hard wall 2 such that there is an air-filled space 16 between the outer circumference of the column body and the front side of the hard wall 2 results. Likewise, they show 6 until 9 that the horizontal distance 50 between the column bodies 4, 4a, 4b, 4c is selected such that there is a free space 51 between adjacent column bodies, which is penetrated symmetrically by the vertical leg of the baffle plate 15 lying between them. The face of the baffle 15 is approximately flush with the front of the 6 until 9 shown column body.

For an explanation of other functions, refer to the divided figure in 10 pointed out.

the 10a shows as a further embodiment that insulating material 20 can also be arranged in the spacing space 16, and the 10b shows the mechanism of sound reflection and sound cancellation.

Starting from a spherical sound wave 21, the sound radiates in the direction of the arrow 22 onto the front of the column body 4, 4a, 4b, 4c and is first reflected by the straight, vertical leg of the guide plate 15 at a first point, as is shown in the illustration 10b indicates.

There is a further reflection on the surface of the column body 4, and there a large part of the sound energy is already swallowed up, with the residual energy being directed again against the baffle and from the baffle into the outside of the column body 4, which results in multiple sound reflections. whose energy is absorbed by the sound-absorbing and sound-absorbing surface of the respective column body 4, 4a, 4b, 4c. The radiated sound runs "dead", so to speak.

This results in a sound-reflecting and sound-absorbing effect in the air-filled spacing space 16, in which sound absorption is possible with a high degree of efficiency, as was not previously known in the prior art.

It is pointed out again that the in 10b illustrated mechanism of sound absorption for all embodiments according to 1 until 12 is applicable.

In the appropriate 6 until 9 there are also different forms of guide plates 15, 15a, 15b, 15c, the shape of the guide plate being adapted to the outer circumference of the column body 4 used there. This also results from the shape of the guide plates 52 and 53.

In a further embodiment, not shown in detail, the baffle plate 15, 15a, 15b, 15c can be omitted completely, whereby the sound absorption effect is reduced, but is still far better than known prior art arrangements.

the 11 and 12 show various other embodiments, wherein the 11 the 2 and it can be seen there that two associated noise protection walls 1a, 1b delimit a roadway 26 on which noise-generating vehicles generate sound waves 21.

The configuration of the PV elements 7, 9, 10 shown, with the crown-side PV elements each forming a PV gable 7, is intended for an alignment in the north-south direction.

Alternatively, the 12 another type of assembly of the PV elements, which in the exemplary embodiment shown consist of PV pent roofs 27 arranged on the crown side.

Such a configuration is intended for an east-west direction of the sun's course.

According to the further embodiment of the group B is based on the 13 and 14 a further noise protection wall 30 is described, which works with a sound absorbing device 31, which can also be used with the execution of a noise protection wall 1, 1a, 1b.

As stated in the general part, the 13 and 14 The silencer device 31 shown can be mounted either in front of a hard wall 2 or in front of a facing shell consisting of column bodies 4 .

The sound absorber device 31 shown can be used universally; it can also be used indoors as a resonance absorber and can be used on any flat components in the street area.

Out of 13 it follows that the sound absorber device 31 is suspended in front of the front side 46 of the noise protection wall 30, the sound absorber device 31 consisting of hollow tubes 32 arranged in rows and columns, which are arranged densely and touching one another next to and one above the other and thus form a matrix arrangement 33.

The front side, open to the sound source swallowing openings 38 are in a verti aligned in a cold plane, but the bottom side 39 and the top side 40 of each tube 32 are directed obliquely upwards, as can be seen from FIG 14 results.

In 14 is a part of the matrix arrangement 33 after 13 enlarged and shown schematically.
The central longitudinal axis 35 through each tube 32 is directed obliquely downwardly against a horizontal line 36 and forms an angle 37 therewith which is less than 90°.

A sound wave 21 entering the swallowing opening 38 aligned in the vertical plane, which forms the sound path 41, is therefore initially reflected in the interior of the tube 32 at a first reflection point 42 and from there into an opposite reflection point 32' and from there in turn into another Reflection point until the sound wave impinges on the front side 46 of the noise protection wall 30 after multiple deflection on the preferably soft and sound-absorbing surface in the area of the connection opening 45 of the tube 32 .

Only small portions of sound, which are reflected backwards from the front side 46 as backward sound 43, interfere with the sound path 41 running in the opposite direction, so that sound cancellation 44 in the interior of the tube 32 occurs in certain frequency ranges. Significant attenuation is achieved in other frequency ranges.

This describes a special type of sound absorber device 31 in connection with a noise protection wall 30 which works together either with a hard wall 2 or with a front shell 3 seated in front of the hard wall 2 .

The embodiment shown according to 13 and 14 is therefore not to be understood as limiting, because the possible combinations of an in 13 illustrated sound absorber device 31 are given with any wall elements. Such a sound absorber device 31 can therefore also in connection with the noise barrier 1, 1a, 1b according to 1 until 12 be used. It can be attached either to the facing shell 3 or to the hard wall 2 behind it. When mounted on the hard wall, the sound absorber device 31 reaches with its tubes 32 through window-like cutouts in the facing shell 3 consisting of column bodies 4, 4a, 4b, 4c

Reference List

1

noise barrier a, b

2

hard wall

3

facing shell

4

Column body a, b, c

5

gabion

6

ground

7

PV Gable

8th

division

9

PV console

10

PV console

11

PV window

12

PV elements

13

windowsill

14

connection board

15

Baffle a, b, c

16

clearance space

17

filling material

18

wire basket mesh

19

anchoring

20

insulation material

21

sound wave

22

arrow direction

23

reflection sound

24

wire mesh

25

mesh size

26

roadway

27

PV pent roof

28

29

30

noise barrier

31

sound absorbing device

32

tube

33

matrix arrangement

34

rectangular tube

35

longitudinal axis

36

horizontal

37

angle

38

mouth opening

39

bottom side

40

ceiling side

41

sound path (inward)

42

point of reflection

43

reverse sound

44

sound cancellation

45

port opening

46

front

47

Distance (to hard wall)

48

semicircular profile

49

Outer profile a, b, c

50

distance (mutual)

51

free space

52

Windscreen (of 15)

53

profile leg

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102007044017 A1 [0002, 0006]
• DE 102014009533 A1 [0005]

Claims (23)

Noise protection wall (1, 1a, 1b) with improved sound absorption consisting of a hard wall (2), preferably made of concrete and/or hollow blocks or the like, and a facing shell (3) placed in front of the hard wall (2) and consisting of parallel and upright standing column bodies (4, 4a, 4b, 4c) which are filled with a filling material (17), characterized in that the column bodies (4, 4a, 4b, 4c) are at such a distance (47) in front of the hard wall (2) are arranged such that in the space between the front side (46) of the hard wall (2) and the outer circumference of the column bodies (4, 4a, 4b, 4c) closest to the hard wall (2) there is a sound-reflecting and/or sound-absorbing space forming an air layer (16) is arranged. noise protection wall claim 1 , characterized in that the front side of the hard wall (2) directed towards the outer circumference of the column bodies (4, 4a, 4b, 4c) is designed as a profile which corresponds to the profile shape of the column bodies (4, 4a, 4b, 4c). noise protection wall claim 1 or 2 , characterized in that the front side of the hard wall (2) directed towards the outer circumference of the column bodies (4, 4a, 4b, 4c) is shaped as a semicircular profile (48), the radius of which is adapted to the radius of the column bodies, ( 1-4 ). noise protection wall claim 2 or 3 , characterized in that the semicircular profiled space (16) formed by matching the semicircular profile (48) of the hard wall (2) and the outer profile (49, 49a, 49b, 49c) forms a sound-reflecting and/or sound-absorbing air gap of uniform thickness, ( 1-4 ). Noise barrier according to one of Claims 1 until 3 , characterized in that the front side of the hard wall (2) directed towards the outer circumference of the column bodies (4, 4a, 4b, 4c) is designed as a flat wall and in that the spacing space (16) formed thereby differs from the distance formed between the column bodies ( 51) narrows conically towards the hard wall (2), ( 6-9 ). Noise barrier according to one of Claims 1 until 5 , characterized in that each column body (4, 4a, 4b, 4c) consists of an upright wire basket (24, 25) filled with a filling material (17), which is provided with spacing means at a distance (47) to form a spacing space (16 ) is arranged in front of the hard wall (2). Noise barrier according to one of Claims 1 until 5 , characterized in that each column body (4, 4a, 4b, 4c) consists of a wire basket-free column made of pressed filling material. Noise barrier according to one of Claims 1 until 7 , characterized in that the column bodies (4, 4a, 4b, 4c) are arranged in parallel and side by side to form such a distance (50) that a clearance (51) is formed between the mutually adjacent outer peripheries. noise protection wall claim 8 , characterized in that in the contact-free free space (51) between the column bodies (4, 4a, 4b, 4c) a guide plate (15, 15a, 15b, 15c) is arranged, which divides the space (16) between adjacent column bodies. noise protection wall claim 8 or 9 , characterized in that the guide plate (15, 15a, 15b, 15c) is connected to the front side 46, 48) of the hard wall (2) and divides the free space (51) between the adjacent column bodies with a profile leg (53). Noise barrier according to one of Claims 1 until 10 , characterized in that the space (16) formed between the column bodies (4, 4a, 4b, 4c) and the front side of the hard wall (2) is at least partially lined with a sound-absorbing insulating material (20) or is filled with a pourable material. Noise barrier according to one of Claims 1 until 11 , characterized in that the profile shape of the column bodies (4, 4a, 4b, 4c) is circular or oval or rectangular or diamond-shaped or square. Noise barrier according to one of Claims 1 until 12 , characterized in that PV modules (9, 10; 7, 27) are arranged on the noise protection wall (1, 1a, 1b). noise protection wall Claim 13 , characterized in that a group of PV modules as a PV gable (7) or as a PV pent roof (27) covers the upper end faces of the noise protection wall (1a, 1b). Noise barrier according to one of Claims 13 until 14 , characterized in that PV elements (12) are used as PV windows (11) in the noise protection wall (1, 1a, 1b) and break through it. Noise barrier according to one of Claims 12 until 15 , characterized in that PV elements are arranged on the noise protection wall in the manner of PV brackets (9, 10) directed obliquely upwards. Noise protection wall (30) with improved sound absorption consisting of a hard wall (2) or a wall (3) consisting of filling material (17) or of a wall made of gabions filled with filling material (17), on the front side (46) of which one or more sound absorbing devices ( 31) are fastened, characterized in that the sound absorber device (31) consists of tubes (32) arranged in rows and columns and open at the front towards the sound source, the rear connection openings (45) of which are flush on the front side (46) of the noise protection wall (30) connect. Noise protection wall (30) after Claim 17 and/or according to any of the preceding Claims 1 until 16 , characterized in that the longitudinal axis (35) of the tubes (32) is aligned obliquely at an angle (37) to a horizontal (36) inclined downwards. Noise barrier (30) according to one or more of the preceding Claims 1 until 18 , characterized in that the tubes (32) are arranged as rectangular or square tubes in a form-fitting mutually touching matrix arrangement. Noise barrier (30) according to one or more of the preceding Claims 1 until 19 , characterized in that the plane of the sound-receiving intake openings (38) is vertical and that each tube (32) has top and bottom sides (39, 40) parallel to one another and side walls parallel to one another. Noise barrier (30) according to one or more of the preceding Claims 1 until 20 , characterized in that the sound-absorbing property of the tube arrangement (31, 32) arranged in a matrix-like manner and directed obliquely downwards is due to the multiple deflection of the sound waves in the interior of the respective tube (32) in the direction of the front side (46) of the wall (1 or 2 ) is based. Noise barrier (30) according to one or more of the preceding Claims 1 until 21 , characterized in that the sound-absorbing property of the tube arrangement (31, 32) arranged in a matrix-like manner and directed obliquely downwards is based on interference-based sound cancellation of the sound path (41) introduced in connection with the sound path (41) on the front side (46) of the wall (2 or 3 ) reflected backward sound (43). Noise barrier (30) according to one or more of the preceding Claims 1 until 22 , characterized in that the interior of the tube (32) is roughened and/or lined with a soundproofing material.

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