| 摘要 |
<p>The sleeper boot consists of an elastically deformable shell (1) to receive the sleeper (T). The shell is sloping inwards at the bottom and contains a sole (2) on which the sleeper rests. The lower part of the shell has recesses (10) in its inner wall which ensure a flexibility on compression even after the wall has been deformed as a result of hydrostatic pressure from the concrete bed (B). The boot's inner recesses are made in the wall to a height corresponding to the thickness of the sole plus the height (t) of a chamfered lower edge on the sleeper. At their lower ends, the recesses extend beneath the edge of the sole. In between the recesses the inner wall of the boot is made with a series of reinforcing ribs.</p> |
