FI89821B - Structure for repairing narrow longitudinal defects in oil gravel roads - Google Patents

Description

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EQUIPMENT TO REPAIR NARROW LONG TERM DAMAGE TO OIL TRACKS

The invention relates to an apparatus for repairing narrow longitudinal damage to oil gravel paths, by means of which an groove is milled, which is filled with a new oil gravel mass, which is further compacted. Here, oil gravel refers to a binder-treated aggregate used as a pavement in road construction.

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Pavements used in road construction fall into two groups, which are: asphalt pavements and oil gravel pavements. Of these, asphalt pavements are specially prepared with asphalt stations erected for these purposes, from which a hot-mixed homogeneous mass is obtained, which is applied by special asphalt spreading machines. The asphalt pavement hardens thoroughly. The oil-gravel coating mass usually consists of cold-mixed binders and aggregate and can be prepared and applied with simpler machines. In general, the oil gravel pavement 20 is considerably less expensive than the asphalt pavement, but its quality is not as good as that of the asphalt pavement. The oil gravel coating only hardens completely from its surface layer.

25 Simple means can be used to repair an asphalt pavement, as the asphalt mass can simply be applied over the old mass, although milling the old base improves its adhesion to the road surface. The same methods cannot be used to repair an oil gravel pavement as to repair an asphalt pavement. This is especially the case when it comes to repairing local damage. Such local damage typically includes longitudinal grooves, cracks, and other damage that have hitherto been difficult to repair. Due to numerous local damages, 35 new ones have been put on the entire road surface, which becomes very expensive. On the other hand, it is sufficient to manually apply the mass on top of the damage, which is compacted with a roller or allowed to compact the traffic. In this case, the stability of these has been poor and often repaired places become detached from the road surface. If the surface of the oil gravel road is milled completely open, 40 milled mass is left as the base material when the entire road v, o: · o i

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the surface has been refurbished. It is known to use the old mass again to repair the asphalt pavement, but the mass collected by a special milling machine has to be mixed with the new mass at the asphalt station. It is not advisable to use the same technique on the Ö1jysorat, 5 because the mass milled from the road surface is poor in binder and as such cannot be mixed with the new mass.

It is an object of the present invention to provide a novel method and apparatus for repairing longitudinal damage to oil gravel roads, in which old paving compound can be used to advantage, and in which the adhesion of the renewed pavement to the road surface is good. The characteristic features of the apparatus according to the invention are set out in claim 1. A core aspect of the invention is that the binder is mixed into the milled mass before the introduction of a new additional roast 15 and that the binder is also sprayed on the sides of the milled groove to ensure adhesion. Most preferably, the milling is performed in a so-called with a comb cutter, which has a simple adjustment of the milling width and is ideal for milling narrow grooves. Most preferably, rotating brushes are used to transfer the milled mass from the sides 20 of the groove back into the groove, which of course can also be used in reverse if necessary. Other features, embodiments and advantages of the invention will become apparent from the following embodiment.

In the following, the invention will be described with reference to the accompanying figures, which show the method and apparatus according to the invention.

Figure 1 shows the different steps for repairing the longitudinal damage of oil pipelines.

30 Figure 2 shows the equipment built around the truck to repair oil gravel roads.

Figure 3 shows a top schematic view of the apparatus of Figure 2.

Figure 4 shows a partial enlargement of the cutter seen from the front.

The method of the invention for repairing longitudinal damage to an oil gravel coating comprises a plurality of steps, as shown in Figure 1. Typically, steps A to D are performed as follows. / ι 3 a vehicle designed for the purpose and the compaction of the pavement is carried out with a roller.

In step A, the groove 1 is milled into the coating and the milled mass 5 is also spread on the sides of the groove. When comb milling is used, a preferred base shape is obtained to which the repair compound adheres. In step B, the masses on the sides of the groove are brushed onto the groove, after which the binder 3 is sprayed, which flows through the milled mass 4. It should be noted here that additional binders-10 are also sprayed on the sides of the groove on an intact coating surface, 5 to 20 cm wide. In this case, the injection of the additional binder takes place only after milling, but it could also take place before milling, in which case, with suitable milling and mass transfer devices, the additional binder can simply be mixed into the milling mass. However, it is more advantageous with the apparatus disclosed herein to inject an additional binder, which is usually a bitumen solution, BIL-0, after milling. This solution also contains solvents that improve the adhesion of the mass to the old road surface.

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In step D, a new pulp 2 is applied on top of the old pulp 4 impregnated with additive 3. The overlapping masses 4 and 2 are then compacted by a roller, step E, in which case they are pressed into a tight layer 5 in the groove 1 and to some extent on its sides. 25 Because the oil gravel coating lives with traffic, the final shape of the repair coating will be reached after about a year, step F.

The apparatus according to the invention is most preferably built around a truck 6 with a tipping body. The cutter 9 is placed 30 in the front bumper of the truck 6 and an additional mass unloader 18 is placed in the rear of the platform 8 and other devices are placed in the trailer 7. A camera 21 is connected to monitor the cutter operation. activity.

The front of the trailer has height- and side-adjustable disc arms 10, followed by spray nozzles 11 in the direction of travel.

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Other means can also be used to transfer the old mass back into the groove, for example various plow solutions.

The trailer is used by a person in radio communication with 5 truck drivers. The pulp spreader 12 is located in the middle of the trailer and can be adjusted in the height direction, which is realized here by means of the height adjustment of the suspension of the wheels. The pulp spreader 12 also includes an adjustment of the width of the rear edge 27 as well as a mixing screw 26 with which the additional pulp 10 is made to spread evenly. The trailer also includes a leveling plate 14, with which the surface can be pre-aligned before the actual rolling. The trailer 7 also includes different control devices 17 for different devices and carries with it an additional binder container 16.

The apparatus shown in Figures 2 and 3 performs steps A to D shown in Figure 1 in successive operations quickly and simply. The pavement repaired after rolling will stick very well on the road.

In this connection, it has been found to be most advantageous to use a comb cutter as the milling cutter 9, in which the number of milling spikes 23 can be set corresponding to the desired width. The rolling spikes 23 have a pin 25 around which a rotating sleeve 24 is placed. When auxiliary wheels 20 are used on the sides of such a comb cutter, the rolling depth 25 can be stabilized.

With the method and apparatus according to the invention, a considerable amount of oil gravel mass can be saved. Firstly, the invention makes it possible to reliably repair local damage and, in addition, saves up to 70% of the mass to be applied. In the past, the need for pulp has been 100 kg / m2, while now it is only 30 - 40 kg / m2. In addition, the binder consumes about 200 1/1000 m.

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Claims (7)

An apparatus for repairing narrow longitudinal damage to an oil grid, the apparatus comprising a trailer (7), a truck (6) with 5 pallets (8), a pulp spreader mounted on a trailer, an additional binder spraying device (11) and a pallet unloader (18) for feeding additional pulp. (12), characterized in that the 10th milling cutter (9) is attached to the front of the truck, and the spreading width of the unloading device (18) is arranged larger than the milling width, and the vehicle comprises means (10) for transferring the mass spreading to the groove. 15 Apparatus according to claim 1, characterized in that the trailer comprises a stern plate (14) separate from the spreader (12) for pre-compacting the applied mass. Apparatus according to claim 1 or 2, characterized in that the devices (1) for transferring the mass spread on the sides of the groove back into the groove comprise rotating brushes (10) arranged on both sides of the groove. Apparatus according to claim 1, 2 or 3, characterized in that said pulp transfer devices (10), binder spraying devices (11) and pulp spreader device (12) are mounted on said trailer (7) and the tipping platform (8) comprises an oil gravel unloading device (18), adapted to supply pulp 30 to the spreader device (12). Apparatus according to one of Claims 1 to 4, characterized in that the pulp spreader device (12) has a height-adjustable open trough extending up to the road surface, the rear edge (27) of which, i.e. the spreading edge-determining edge, is width-adjustable. 6 b 9 9 21 5. ri Γ 21 Apparatus according to any one of claims 1 to 5, characterized in that said truck (6) comprises a camera (21) describing the operation of the cutter and a monitor (22) connected thereto for the driver. 5 Apparatus according to one of Claims 1 to 6, characterized in that the cutter (19) is a so-called a comb cutter in which milling tines (23) are spaced at regular intervals on the cutter body, the tines (23) including a sleeve (24) rotatably positioned around each pin (25), and the cutter having auxiliary wheels (20) for determining the milling depth. 15