| 摘要 |
The present invention relates to the so-called ballast cleaning and levelling machines circulating on the railroad to be renovated while bearing on it by two end bogies and lifting the part of the track situated between the two bogies through lifting device. According to the invention the machine carries in front of the lifting device as such a shoe which is engaged at least under the tie ends between a point which is exterior to but neighboring the tie end and a point situated inside in relation to the tie end, and an endless cable guiding device comprising guides in the front and rear for respectively introducing one of the cable strands from the outside of the tie ends, behind the shoe, and extracting the other end of the cable strand from under the ties downstream of the lifting device and guides for maintaining the cable strand between its introduction and extraction, under the ties, at a distance from the rail upper surface which is substantially equal to the sum of the rail height and the ties thickness. The invention avoids non lifting of the ties on which rails are fixed by smooth spikes.
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