DE2143484A1 - Procedure for adjusting the rail line on railways - Google Patents

Description

British Railways Board, 222, Marylebone Road, London N.W. 1 / England

Procedure for adjusting the rail line on railways

The invention relates to the maintenance of railway tracks and in particular readjustment or re-leveling of rails.

It is possible to lay a track at any height or any level. In the course of However, over time, the vertical loads associated with the passing train traffic change the rail line, which must be raised or adjusted back to the original level.

A well-known method, the rail track on the ur nal Raising height consists of raising each threshold by an amount sufficient to be accurate To restore level. The threshold is kept at this exact level by means of ballast stones that are on the original ballast bed and placed under the underside of the sleeper. However, since the one to lift

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is generally marginal to the exact level needed, only small stones can be used. However, these small stones tend to core downward or to slide and fill in the gaps between the larger gravel stones? however, this has to The result is that the exact level is not maintained and that the free drainage ^ of the already lying ballast is reduced will.

The invention is based on the object of creating a method for adjusting a rail track that relatively large stones can be used to keep the sleepers at their corrected level and that consequently does not have the disadvantages mentioned above.

According to the invention, this object is achieved quite generally in that a tubular part is placed in a ballast bed is driven in to move the ballast and thereby raise a threshold to its exact level and that by means of this tubular part ballast stones are brought into such a position that the threshold their exact level is kept when the tubular Part is withdrawn.

The method according to the invention also comprises the following method steps : Driving a tubular part with a closed front end into the gravel bed around the Moving ballast and raising a sleeper to its exact level opens the face of the tubular Part and feeding of ballast stones from its rear end to that of the tubular part when retracting to fill in the free space left in the gravel bed.

The tubular part is advantageously made according to the invention from a bush on a one-piece mandrel, the front end of which is driven into the ballast after which the mandrel is pulled out of the socket,

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to open the front end of the socket so that gravel stones can be fed down from their rear end.

Further features and advantages of the invention are shown in greater detail on the basis of exemplary embodiments in the drawing explained. It shows:

Fig. 1 shows a sleeper in a ballast layer with a tubular part which is driven into the layer;

Pig. 2 is a view corresponding to FIG. 1 with a second Embodiment of a tubular part according to the invention.

As shown in Fig. 1, there is a threshold 1 in or on a layer of gravel 2. A tubular part that forms out as a mandrel J5 within a socket 4 is, is driven into the ballast layer 2 and has moved ballast stones and so the threshold 1 to raised a small amount.

The mandrel 3 is then removed from the interior of the socket pulled out, leaving the socket in place. Some gravel stones of appropriate size will be then pulls down the inside of the socket 4 and compresses them so that they are tightly packed together are. The socket 4 is then withdrawn a short distance and more stones are fed in and stomped on as before. This process is repeated several times until the socket 4 is completely is withdrawn. The space previously occupied by the socket 4 is now filled with gravel stones, so that the Threshold 1 is held in its raised position.

As shown in Fig. 1, the front end 5 of the dome 3 is pointed, so that the first process step of driving the bushing including the bushing into the ballast layer is facilitated. This driving can

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by hand or preferably by means of any hydraulic or mechanical ram, not shown, which is arranged on a track maintenance car, which also carries a supply of ballast stones.

A second exemplary embodiment according to the invention is shown in FIG.

In this embodiment of the invention, the retractable inner mandrel is of the first embodiment replaced by an expandable end part 6, which is in the end of the socket 4 before it is driven into the Gravel layer 2 is used. Ballast stones are fed to the socket 4 and - as described above - firmly " tamped while the sleeve 4 is gradually withdrawn and the end piece 6 and the stones in their position remain.

In a modification of the method according to the exemplary embodiment in Pig. 1, the mandrel 3 is ^only partially inserted into the bushing 4 so that a gap remains between the tip of the mandrel and the end of the bushing 4. The bushing 4 is driven with the partially inserted mandrel 3 into the gravel layer 2, whereby the bushing 4 picks up ballast stones during driving in, namely in the area to the side of the threshold 1, until the interior of the socket 4 is filled. The bush 4 with the mandrel 3 is then driven further into the ballast layer 2 until the end of the bush 4 is in the position shown in FIG is then carried out as above, with the ballast stones remaining below the sleeper 1 that were picked up on the side of the sleeper.

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Claims (4)

Claims Iy) method for adjusting a rail line in railways, characterized by driving a tubular part into the ballast layer below a sleeper to move ballast and raise the sleeper to an exact level, by feeding ballast stones by means of the tubular part to such places that the Threshold is held in its exact position and then retracting the rohrför shaped part. 2.) The method according to claim 1, characterized in that the tubular part with the front end closed is driven into the ballast layer, that the Vordarende of the tubular part is then opened and ballast stones are fed into it downward from its rear end to the retraction of the tubular part to fill the space that is forming in the layer of gravel. j5.) Method according to claim 1 or 2, characterized in that the tubular part is withdrawn in a sequence of steps, the ballast stones being tamped inside the tubular part before each subsequent step. 4.) Apparatus for carrying out the method according to claim 1 or 2, characterized in that the tubular part is a tubular socket which surrounds a retractable mandrel, the mandrel is withdrawn from the socket to open the front end of the socket so that ballast stones can be fed down from the rear end. 5.) Device for carrying out the method according to claim 1 or 2, characterized in that the tubular part is a tubular bushing that a removable, expandable terminating part is in front of the front end. -2- 209812/01 SS is seen and that the front end of the socket into the Ballast layer is driven into it, and the end part remains in its position, and that the rear The end of the socket remains open so that ballast stones can be fed in the downward direction. 209812/0156