| 摘要 |
This block, for example made of concrete, has a slab-shaped body 1, the top of which carries a wall 2 for retaining ballast 15, which divides the top of the slab into a footpath portion 3 and a ballast embankment plane 4 and the bottom of which carries a heel 7 located at the end of the slab 1 on the same side as the embankment plane 4 and intended for engaging into an excavation 6 of the foundation 5 of the track during the laying of the block. Such a block for holding the ballast in place ensures, in particular, a greater resistance to earthquakes. <IMAGE>
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