DK2761088T3

DK2761088T3 - PROCEDURE FOR REMOVAL OF A BALLAST BEARING ON A TRACK

Info

Publication number: DK2761088T3
Application number: DK12775436.4T
Authority: DK
Inventors: Josef Theurer; Manfred Brunninger
Original assignee: Plasser Bahnbaumasch Franz
Priority date: 2011-09-29
Filing date: 2012-09-04
Publication date: 2016-02-01
Also published as: WO2013045019A1; EP2761088A1; EA025316B1; AT511472A4; CN103814176B; EP2761088B1; CN103814176A; JP2014528038A; JP6073330B2; EA201400176A1; ES2570434T3; AT511472B1; PL2761088T3

Description

DESCRIPTION

The invention relates to a method of rehabilitation of a ballast bed of a track, wherein an upper, reusable bedding layer is picked up by a first clearing device - with regard to a working direction - and subjected to cleaning, while parallel thereto a lower bedding layer adjoining the upper bedding layer is picked up and disposed of by a second clearing device following behind, thus creating an earth formation, wherein gravel accruing during the cleaning process is recycled as a gravel layer discharged upon the earth formation .

According to EP 2 025 810, it is known to pick up an uppermost layer of the ballast bed for recycling. The gravel thus accruing during cleaning is discharged upon the remaining ballast bed and picked up by a second clearing device, following behind, together with reusable gravel. The latter is discharged upon the exposed formation to the rear of a third clearing device to constitute the bottom layer of the newly-formed and cleaned ballast bed.

From EP 2 257 673, it is also known to temporarily store on the ballast bed the gravel which accrues during a first cleaning process. Said gravel is picked up, together with still usable gravel of the ballast bed, and discharged upon an exposed earth formation for forming a gravel layer.

It is the object of the present invention to provide a method of the type mentioned at the beginning with which it is possible in an efficient manner to extract recyclable gravel from the ballast bed in the course of ballast cleaning.

According to the invention, this object is achieved with a method of the specified type by way of the following features: a) gravel which has been screened out from reusable ballast as a result of a first cleaning process of the upper bedding layer is discharged upon the earth formation to the rear of the second clearing device, with regard to the working direction, and graded and compacted for producing the gravel layer, b) parallel thereto, residual gravel accruing as a result of further cleaning operations of the reusable ballast picked up by the first clearing device is discharged upon the track in front of the first clearing device, in the working direction, and picked up by the first clearing device in connection with the upper bedding layer.

With a method of this kind, it is possible in a particularly simple and efficient manner to pick up jointly both the ballast to be cleaned as well as the reusable gravel. Due to the immediate removal of the gravel accruing in the first cleaning process, an improved cleaning of the remaining ballast-gravel mixture is possible. As a result of the intermediate storage on the bedding, the residual gravel accruing during this subsequent cleaning process can be picked up without problems for full and complete recycling while avoiding additional structural expense.

Additional advantages of the invention become apparent from the drawing description. The invention will be described in more detail below with reference to an embodiment represented in the drawing in which Figs. 1 and 2 each show a simplified side view of a front or rear section - with regard to a working direction - of an installation for rehabilitation of a ballast bed. A machine 1, shown in Figs. 1 and 2, for rehabilitation of a ballast bed 2 is composed of several vehicles 4 which are coupled to one another and mobile on a track 3. A first clearing device 6 - with regard to a working direction 5 of the machine 1 - is provided for picking up an upper, reusable bedding layer 7 of the ballast bed 2. Also arranged, following behind, is a second clearing device 8 with which it is possible to pick up a lower bedding layer 10 adjoining the upper bedding layer 7, thus creating an earth formation 9. By way of example in the illustrated case, both clearing devices 6, 8 are designed as endless excavation chains guided around the track 3.

Positioned immediately behind the first clearing device 6 is a first screening installation 12, designed to be charged by a conveyor belt 11, which expediently has the shape of a screen comprising rotatable rollers. Gravel 16 which accrues as a result of being separated in said first screening installation 12 is conveyed via a number of conveyor belts 11 to a first discharge point 13 which is located immediately to the rear of the second clearing device 8, with regard to the working direction 5. In the region of the discharge point 13, a grading- and consolidating device 14 for producing a gravel layer 15 resting on the earth formation 9 is provided.

Reusable ballast 17, remaining at the first screening installation 12 after the separation of gravel 16, is delivered via further conveyor belts 11 to a second, third, fourth and fifth screening installation 18 to 21. For the purpose of thorough cleaning, i.e. a most extensive separation of gravel 16 still left in the ballast, these screens 18 to 21 are configured in different ways. Additionally, a crusher plant 22 for sharpening the ballast 17 is provided between the third and fourth screening installation 19, 20. The ballast 17 finally accruing after the fifth screening installation 21, having thus been thoroughly cleaned, arrives - via a plurality of conveyor belts 11 - at a discharge point 23 positioned to the rear of the second clearing device 8.

Located immediately in front of the fifth screening installation 21 is a gravel discharge point 24 for discharging upon the track 3 the residual gravel 25 accruing as a separation at the screening installations 18 to 21 and the crusher plant 22.

The method of rehabilitation of the ballast bed 2 will now be explained in more detail with the aid of the machine 1 described by way of example.

The machine 1 is advanced continuously on the track 3 in the working direction 5. The first clearing device 6 is set with regard to the vertical in such a way that merely the reusable upper bedding layer 7 of the ballast bed 2 is picked up. The trailing second clearing device 8 is set in such a way that the remaining lower bedding layer 10 of the ballast bed 2 is picked up and disposed of, thus creating the earth formation 9.

In the course of a first cleaning operation taking place in the first screening installation 12, gravel 16 is screened out from the reusable ballast 17 of the upper bedding layer 7. Said gravel is immediately discharged behind the second clearing device 8, in the working direction 5, upon the earth formation 9 via the first discharge point 13 and graded and consolidated for producing the gravel layer 15.

The ballast 17 pre-cleaned by the first screening installation 12 is successively further intensively cleaned, sharpened and washed in the following screening installations 18 to 21. Reusable residual gravel 25 accruing by way of these cleaning operations is discharged upon the track 3 via the gravel discharge point 24 in front of the first clearing device 6, in the working direction 5, and is picked up in further sequence, together with the upper bedding layer 7, by means of the first clearing device 6. With the first cleaning by the first screening device 12 - which could also be called pre-cleaning - the above-described cleaning cycle is repeated.

Parallel thereto, by means of the second clearing device 8, the remaining lower bedding layer 10 is continuously picked up and delivered via conveyor belts 11 to storage wagons (not shown) for disposal.

New ballast which has been pre-stored in a store (not shown) is discharged upon the gravel layer 15, produced in the meantime, and graded. Finally, the cleaned ballast 7 originating from the ballast bed 2 is discharged via the discharge point 23 upon said layer of new ballast, and the track 3 is laid upon the newly formed ballast bed.

Claims

A method of decontaminating a ballast bearing (2) on a track (3), in which an upper reusable bearing layer (7) is received and guided by a first clearing device (6) to a first clearing device (6). cleaning, while parallel to this, a bearing layer (10) adjacent to the upper bearing layer (7) is taken up and disposed of by a subsequent additional clearing device (8), providing a plane (9), gravel (16) resulting from the cleaning, from which gravel layers (15) being returned on the planum (9) are recycled, characterized by the following features: (a) Gravel (16) sieved as a result of an initial cleaning process of the upper bearing layer (7) for reusable ballast (17), is thrown onto the planum (9), planed and compacted in the working direction (5) behind the additional clearing device (8) to produce the gravel layer (15), (b) in parallel with the residual gravel of this (25) arising from further cleaning processes for the reusable ballast (17) - received by the first clearing device (6) - in the working direction (5) in front of the first clearing device (6) on the track (3) and received in connection with the upper bearing layer (7) by the first clearing device (6).