EP2287403A2 - Method for producing a road pavement, primarily a concrete pavement, and road finisher - Google Patents

Abstract

The paver has a drivable running gear, and a smoothing device arranged behind the running gear in a paving direction (12). Compression units for a road-building material i.e. concrete (33), are arranged in front of the smoothing device. The compression units are designed as vibrating bodies (23) that are inserted partially into the road-building material. The vibrating bodies are arranged between the running gear and the smoothing device in a suspended manner. The vibrating bodies are arranged in a row extending transverse to the paving direction. An independent claim is also included for a method for producing a concrete road surface.

Description

The invention further relates to a method for producing a road surface, preferably a concrete road surface, according to the preamble of claim 11.

Road surfaces are made of asphalt or concrete. In addition, there are also road surfaces, which consist partly of asphalt and concrete. For this purpose, it is customary to apply to a substructure or at least a lower layer of asphalt, a cover layer of concrete. For example, in asphalt pavements, the milled worn out asphalt pavement is replaced by a concrete pavement.

The production of asphalt road surfaces is done with self-propelled road finishers, which are referred to in the jargon as a black paver. Concrete pavements are made with specially designed pavers. That's why different pavers are required for road surfaces of different materials. This is especially costly if a cover layer of concrete is to be applied to an asphalt substructure.

The invention has for its object to provide a method which makes it possible to produce a road paver for asphalt road surfaces and concrete road surfaces, especially concrete cover layers. It is another object of the invention to provide a paver for the production of asphalt road surfaces, which also concrete road surfaces can be produced.

A paver to solve this problem has the features of claim 1. Accordingly, it is provided to form the compression means as at least partially immersed in the road construction material Rüttelkörper. The vibrating bodies make it possible to produce concrete pavements with a road paver intended for the production of asphalt pavings, in that, in contrast to the production of asphalt pavements, where pressure is exerted on the asphalt pavement material from above, the concrete is at least partially embedded therein submerged vibrating bodies is not compressed by pressure, but by vibrations. Thus, the paver according to the invention fulfills an essential prerequisite that is required to produce concrete road surfaces.

It is preferably provided to arrange the Rüttelkörper the same between the chassis of the paver and the smoothing device. This arrangement is preferably suspended, whereby the Rüttelkörper can dive without pressure from above into the fresh concrete due to their vibration or oscillatory movements to compress this by vibrations or other preferably periodic movements.

A preferred development of the paver provides it to attach the vibrating body hanging preferably on a carrier. It may be a carrier on which the smoothing device and / or other components of the road paver are held. The suspended arrangement allows the vibrating body to "dig in" by shaking movements to a designated depth into the fresh concrete for pavement preparation. The suspended arrangement of the Rüttelkörper can be done on flaccid ropes or chains so that they can migrate laterally, so have no leadership in the production direction and transverse thereto. Preferably, however, it is provided to hang the Rüttelkörper out, preferably on rigid or substantially rigid rods or tubes or similar strands. In this way it is prevented that the Rüttelkörper do not dodge or move together due to the moving in the direction of production road paver. In addition, preferably pipes for guided suspension of the vibrating body on the carrier for supplying energy to the arranged inside the vibrating body vibration or Serve unbalance generator. These may be electrical, hydraulic or pneumatic lines.

It is further provided to arrange the Rüttelkörper in at least one transverse to the direction of production row. Preferably, the Rüttelkörper are at least one row suspended over the entire working width of the paver distributed on the carrier. This allows the fresh concrete to be evenly compressed over the entire working width.

It is further provided for adaptation to different circumstances, to change the distance of the vibrating body to each other gradually or continuously and alternatively or additionally hang the Rüttelkörperträger height adjustable. By changing the distance of the vibrating body, it is possible to change their distance with the change in the working width of the smoothing device. The height adjustment has the consequence that the Rüttelkörper more or less, but possibly also completely immersed in the fresh concrete for the production of concrete road surface. Accordingly, the degree of compaction of the concrete can be influenced individually.

The invention further provides for arranging the vibrating bodies in front of and / or behind a transverse distribution device for the road building material. If the vibrating bodies are arranged both in front of and behind the transverse distribution device, this is done in two parallel rows, one of which is located in front of and behind the transverse distribution device. The vibrating bodies are then expediently suspended on a support on which the transverse distribution device is also located.

A method for solving the above-mentioned problem comprises the measures of claim 11. In this method, it is provided that the road construction material, preferably concrete, is compacted by shaking and while the compression means are at least partially immersed in the road construction material. By shaking, a road paver for asphalt pavements can effectively compact concrete for pavements to be made therefrom. By immersing the compression means in the concrete this is offset by the compression means in shaking, in particular in vibrations. These periodic movements result in effective compacting of the concrete for a concrete pavement made with a paver for asphalt pavements. A preferred embodiment of the method provides that the smoothing of the paver is performed at the working height. In contrast to the usual in the production of asphalt pavements floating operation of the smoothing device, wherein the smoothing device rests with its own weight on the fresh road surface, the guiding of the smoothing device in the intended working height has the consequence that the smoothing device is a quasi-rigid unit with the rest Part of the paver, in particular its drive, forms and thereby the smoothing device is supported together with at least a portion of the weight of the paver on the freshly built concrete pavement.

Preferably, the smoothing device is rigidly guided or rigidly fixed in the working height. The working height thereby changes only if this is necessary due to a curved course of the substructure of the road or a change in the layer thickness of the concrete pavement. Furthermore, it is preferably provided to guide the smoothing device with a height control or regulation by maintaining the rigid guidance of the smoothing device, which is preferably a screed, in particular a high-density screed.

The compression means are preferably permanently shaking, preferably oscillating, driven, independently of each other by their own drive. The frequency with which the compression means shake or be driven swingably, according to a preferred embodiment of the invention changeable, so that it is individually adaptable to the prevailing conditions.

Fig. 1

eine Seitenansicht eines Straßenfertigers,

Fig. 2

einen hinteren Teil des Straßenfertigers der Fig. 1 in vergrößertem Maßstab,

Fig. 3

eine Draufsicht auf eine Glätteinrichtung und Verdichtungsmittel des Straßen- fertigers,

Fig. 4

eine vergrößerte Einzelheit IV aus der Fig. 3, und

Fig. 5

eine schematische Draufsicht auf den Straßenfertiger.

Hereinafter, a preferred embodiment of the invention will be explained in more detail with reference to the drawing. In this show:

Fig. 1

a side view of a road paver,

Fig. 2

a rear part of the road paver Fig. 1 on an enlarged scale,

Fig. 3

a plan view of a straightener and compaction means of the road finisher,

Fig. 4

an enlarged detail IV from the Fig. 3 , and

Fig. 5

a schematic plan view of the paver.

The Fig. 1 shows schematically a paver 10, which is inventively designed so that it not only serves to produce an asphalt road surface, but is also suitable for the production of a concrete pavement. Above all, the paver 10 is also suitable for applying a concrete topcoat to an existing asphalt pavement whose worn overlay is removed by, for example, milling.

The paver 10 has a chassis 11, which is formed in the embodiment shown as a crawler chassis. The chassis of the paver 10 but can also be a wheel drive.

Viewed in the production direction 12, a trough-like or trough-shaped reservoir 13 is arranged at the front of the paver 10. The reservoir 13 serves to receive a supply of serving for the production of the pavement material, namely an asphalt mixture, when the paver 10, an asphalt pavement is made. By a conveying member, in particular a scraper conveyor 14 (FIG. Fig. 5 ), the asphalt mixture is transported from the reservoir 13 against the production direction 12 to a rear end 14 of the paver 10. For the production of concrete pavement or a concrete cover layer of the reservoir 13 but usually not used.

The paver 10 has at the rear end 14, behind the chassis 11, via a distributor screw 15 which extends transversely to the production direction 12 and serves to distribute the material for the production of the road surface over the entire working width of the paver 10 evenly. Viewed in the direction of production 12, behind the distributor screw 16 there is a smoothing device, in which the road paver 10 shown here is a screed 17. The screed 17 and the auger 16 are suspended from two support arms 18. The support arms 18 are pivotally mounted by the hydraulic cylinder 19 on the chassis 11 for moving up and down the screed 17 and the auger 16. The screed 17 can be both breitunveränderlich and be variable in width. Such a modification of the working width of the road paver 10 permitting screed 17 is shown in the figures. This screed 17 has a central main beam 20 and two on opposite sides of the same transversely movable to the production direction 12 movable mats 21st

At the outer, free ends of the mews 21 vertical side plates 22 are provided in the screed 17 shown here, the longitudinal directions extending in the production direction 12. The side plates 22 are thus in parallel and vertical planes which extend in the production direction 12.

The paver 10 shown here has for processing concrete 33 to a concrete pavement or a concrete cover layer 32 via a plurality of compression means, which are inventively designed as Rüttelkörper 23. The vibrating bodies 23 are preferably equally designed vibrating bottles. The vibrating body 23 are arranged between the chassis 11 and the screed 17. This arrangement is such that all vibrating bodies 23 are arranged hanging on a support 24 connected to the support arms 18. In the in the Fig. 2 shown embodiment, two extending over the respective working width of the paver 10, parallel rows, each with a plurality of vibrating bodies 23 attached to the support arms 18 movable up and down carrier 24. In this case, there is a series of vibrating bodies 23 between the chassis 11 and the auger 16, while the second row with several vibrating bodies 23 is located between the auger 16 and the screed 17. The vibrating bodies 23 of this second (rear) row are also attached to the support 24 which can be moved up and down by the support arms 18. However, it is also conceivable that the road paver 10 has only one row of a plurality of vibrating bodies 23, which may be arranged both in front of and behind the auger 16.

The carrier 24 has a transversely to the production direction 12 extending rod 25, which may optionally be formed like a tube. Opposite ends of the rod 25 are telescopic, whereby the rod 25 to the variable working width of the paver 10, namely the respective width of the screed 17, is adjustable. The movable ends of the rod 25 are moved together or apart by suitable drives, in particular by hydraulic cylinders or racks, to adapt to the working width of the paver 10.

Each vibrator body 23 is associated with a displaceable on the rod 25 sleeve 26. On the sleeve 26 of the respective Rüttelkörper 23 is connected to a handle-like upper support rod 27 or a holding tube. In the support rod 27 of each Rüttelkörpers 23 is a vertical slot 28. Thus, the height of the respective Rüttelkörpers 23 is variable, in such a way that the Rüttelkörper 23 dips to an extent in the concrete 33 in front of the screed 17. The distance of the Rüttelkörper 23 to each other is variable by a displacement of the respective connected to the support rod 27 sleeve 26 on the rod 25. The distance adjustment of the vibrating body 23 transversely to the production direction 12 takes place in the embodiment of Fig. 4 stepwise by providing a series of a plurality of spaced-apart through-holes 29 in the rod 25 and the sleeve 26. By a screwed through a selected through hole 29 screw both the distance of the vibrating body 23 to each other and the height of the vibrating body 23 can be fixed. Alternatively, it is also conceivable to provide a continuous adjustment of the distance of the vibrating body 23 transversely to the production direction 12 by the sleeve 26 is fixed by appropriate locking at the intended location of the rod 25 against lateral displacement.

The vibrating bodies 23 which are suspended on one or, if appropriate, also a plurality of rods 25, can be folded up into the in the case of non-use, for example if the road paver 10 is to be used for the production of asphalt road surfaces Fig. 2 dashed shown non-use position. This can be done manually, but also by appropriate part-turn actuators.

The cylindrical vibrating bodies 23, which are preferably designed as vibrating bottles, are provided internally with a vibration exciter which is formed for example by an imbalance drive. The imbalance drive or any other vibration generator are electrically operated with an electric motor arranged in the vibrating body 23 or hydraulically or pneumatically. The energy required for this is supplied by the drive of the paver 10. The shaking movements of the vibrating bodies 23 are preferably directed radially to the longitudinal central axis 30 of the vibrating body 23, in any direction or circumferentially. However, it is also conceivable, alternatively or additionally, to move the vibrating bodies 23 shaking or vibrating in the direction of the longitudinal central axis 30.

• Gemäß dem erfindungsgemäßen Verfahren werden mit dem gezeigten Straßenfertiger 10, der gewöhnlich zur Herstellung von Asphalt-Straßenbelägen eingesetzt wird, auch Straßenbeläge aus Beton hergestellt. In der Fig. 2 ist dargestellt, wie mit dem Straßenfertiger 10 auf einem beliebigen Unterbau 31, wobei es sich auch um einen Asphaltbelag mit abgefräster Deckschicht handeln kann, eine Deckschicht 32 aus Beton 33 aufgebracht wird.

The method according to the invention will be explained in more detail below with reference to the road paver 10 described above:

• In accordance with the method of the invention, road pavers made of concrete are also produced with the paver 10 shown, which is usually used for the production of asphalt road surfaces. In the Fig. 2 is shown as with the paver 10 on any substructure 31, which is also an asphalt pavement can deal with milled cover layer, a top layer 32 of concrete 33 is applied.

The concrete 33 is as shown in the Fig. 5 For example, from a concrete mixer on opposite longitudinal sides of the paver 10 on the base 31 unloaded, as a concrete pile 34 on opposite sides of the paver 10. By moving the paver 10 in the production direction 12 reach the concrete piles 34 in the sphere of influence of opposite outer ends of the auger 16th whereby the concrete 33 of the concrete piles 34 is distributed substantially evenly over the entire working width of the road paver 10 in front of the screed 17.

The pre-screed 17 accumulating stock of concrete 33 (FIG. Fig. 2 ) is compressed by the Rüttelkörpern 23. The vibrating body 23 are guided hanging under the carriers 24, in such a way that they are held laterally by the support rods 27, so in the production direction 12 and in the direction transversely thereto - apart from the Rüttelbewegungen - can not move significantly. When compacting, the vibrating bodies 23 dip at least partially into the concrete 33. As a result of the shaking or oscillating movements of the vibrating body 23 of the concrete 33 is excited before the screed 17 to be shaken or pulsating movements and so compacted.

By varying the distance of the vibrating bodies 23, their immersion depth into the concrete 33 and / or the oscillation frequency, the degree of compaction can be adapted to the type and mixing ratio, in particular the consistency, of the concrete 23. The corresponding settings and adjustments are preferably carried out by controls and adjusting drives, which can be influenced by the operator from the control station 35 of the road paver 10.

When manufacturing the cover layer 32 formed from the concrete 33, the screed 17 is not operated floating as usual in the production of asphalt pavements, but fixed in height. The screed 17 is preferably rigidly suspended from the support arms 18, as well as the auger 16 and the carrier 24 for the Rüttelkörper 23. Also, the support arms 18 are not moved. As a result, the height of the screed 17 relative to the chassis 11 remains unchanged during the production of the cover layer 32 formed from the concrete 33. In this way, the screed 17 pushes not only with its own weight, but also with the weight of the paver 10 on the concrete 33 to form the cover layer 32. Only if the thickness of the cover layer 32 is to be changed or it requires the height profile of the substructure 31, the screed 17 is raised or lowered by pivoting the actuatable by the hydraulic cylinders 19 support arms 18. The fixed in height or rigidly guided screed 17 can by the controller, which is preferably a leveling automatic, if necessary, the height and bank of the screed 17 change.

If the road paver 10 a pavement made of asphalt, it is easily convertible by only the vibrating body 23 are pivoted about the rod 25 by turning the sleeves 26 in the in the Fig. 2 Dashed position shown. As a result, the vibrating bodies 23 are brought into a rest position for installing asphalt, for which they are not needed. In addition, the screed 17 is then operated floating. Conversely, the paver 10 can be easily retrofitted for the installation of concrete 33.

Deviating from the representation in the Fig. 5 It is also conceivable to provide a V-shaped shield in front of the chassis 11 of the road paver 10 which, in the manner of a plow, parts the concrete piles deposited in front of the road paver 10 and passes the concrete 33 on both sides next to the paver 10. This produces on opposite sides of the paver 10 continuous strands of concrete 33, preferably behind the chassis 10 of the auger 16 spread evenly over the entire working width of the paver 10 before the screed 17 and immersed in the concrete 33, periodically vibrating vibrating bodies 23rd be compacted.

A further alternative embodiment of the road paver for carrying out the method described above is characterized in that the screed 17 is replaced by a smoothing device having a rail extending transversely to the production direction 12. By the rail located between the side plates 22 and compacted by the Rüttelkörpern 23 or precompressed concrete 33 is pulled smoothly. The rail of the smoothing device is höhenunveränderlich led by paver 10, namely held rigidly behind the chassis 11 of the paver 10 during the production of the cover layer 33, and preferably on the support arms 18th

LIST OF REFERENCE NUMBERS

10

pavers

11

landing gear

12

production direction

13

reservoir

14

scraper conveyors

15

rear end

16

auger

17

screed

18

Beam

19

hydraulic cylinders

20

main beam

21

shifting beam

22

side shield

23

vibrating

24

carrier

25

pole

26

shell

27

Handrail

28

Long hole

29

Through Hole

30

Longitudinal central axis

31

substructure

32

topcoat

33

concrete

34

concrete piles

35

operating platform

Claims (15)

Road finisher with a drivable running gear (11) and at least one seen in the production direction (12) behind the chassis (11) arranged smoothing means and compaction means for the road construction material, preferably concrete (33) before the smoothing device, characterized in that the compression means as at least partially in the road building material dipping vibrating body (23) are formed. Paver according to claim 1, characterized in that the vibrating body (23) between the chassis (11) and the smoothing means are arranged, preferably hanging. Road paver according to claim 1 or 2, characterized in that the vibrating bodies (23) are suspended on at least one carrier (24). Road paver according to one of the preceding claims, characterized in that the vibrating bodies (23) are suspended on the carrier (24), preferably on rods, tubes or the like. Paver according to one of the preceding claims, characterized in that the vibrating body (23) at at least one transverse to the production direction (12) extending row are arranged, preferably in at least one row on the carrier (24) are suspended. Road finisher according to one of the preceding claims, characterized in that the distance between the vibrating body (23) is variable with each other. Paver according to one of the preceding claims, characterized in that the vibrating body (23) on the support (24) height-adjustable and / or pivotable, preferably swung up, are suspended. Road paver according to one of the preceding claims, characterized in that the vibrating bodies (23) are arranged in front of and / or behind a transverse distribution device for the road building material. Road paver according to one of the preceding claims, characterized in that the vibrating bodies (23) are designed for compacting concrete (33). Road paver according to one of the preceding claims, characterized in that the vibrating bodies (23) each have their own vibrator drive, preferably a vibration or unbalance generator, wherein the vibrating bodies (23) are preferably designed as vibrating bottles. A method for producing a road surface, preferably a concrete pavement, comprising a self-propelled road paver (10) from which the road construction material is compacted with compaction means and then smoothed with at least one smoothing device, characterized in that the road construction material is compacted by vibration and thereby the compaction means at least partially immersed in the road building material. A method according to claim 11, characterized in that the compression means are vibrating and / or driven swinging. Method according to claim 11 or 12, characterized in that vibrating bodies (23), in particular vibrating bottles, are used as compacting means. Method according to one of claims 11 to 13, characterized in that of the compaction Mifteln, in particular the Rüttelkörpern (23), concrete (33) for a concrete pavement, in particular a concrete cover layer (32) is compressed. Method according to one of claims 11 to 14, characterized in that the smoothing device is preferably rigidly guided in the working height, wherein in particular the smoothing device is guided by a height control, for example a leveling device.

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