Method of constructing a rail track on a track-receiving concrete slab
AssigneeAlstom
InventorsJean Ehrsam, Yvan Skific
Life of this patent
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Abstract
A method of constructing a rail track on a track-receiving concrete slab provided with channels serving to receive the rails of the rail track, wherein, after the concrete forming the track-receiving slab has set, it comprises at least the following steps: a) the stretches of rail are put in place above the channels in the track-receiving slab, each rail having a foot coated with a casing of resilient material; and b) the foot as coated with its casing is inserted into the channel by force.
Claims8
1/ A method of constructing a rail track on a track-receiving concrete slab provided with channels serving to receive the rails of the rail track, wherein, after the concrete forming the track-receiving slab has set, it comprises at least the following steps:
- a) the stretches of rail are put in place above the channels in the track-receiving slab, each rail having a foot coated with a casing of resilient material whose thickness is such that the foot as coated with its casing is slightly wider than the channel;
- b) the foot as coated with its casing is inserted into the channel by force, the shape of the channel being suitable for reacting to the compression forces from the resilient material of the casing with a reactive force tending to hold the rail at the bottom of the channel;
- and
- c) the empty volume situated in the top portion of the channel on either side of the rail is filled with resin which seals the installation.
2/ A method of constructing a rail track according to claim 1, wherein, prior to step a), the rails in each stretch are welded together end-to-end.
3/ A method of constructing a rail track according to claim 1, wherein, at least locally, each channel has a width that tapers going from the bottom to the top of the channel.
4/ A method of constructing a rail track according to claim 3, wherein said channels are of trapezium-shaped cross-section, the larger base of the trapezium constituting the bottom of the channel.
5/ A method of constructing a rail track according to claim 4, wherein the edges of the channel are inclined at in the range 3° to 15° relative to the plane perpendicular to the bottom of the channel.
6/ A method of constructing a rail track according to claim 1, wherein the casing coating the foot of each of the rails has a shape that has extra thickness of a few millimeters relative to the complementary shape of the channel.
7/ A method of constructing a rail track according to claim 1, wherein, prior to step c), a primer is deposited on the edges of the channel, and on the sides of the rail so as to improve the adhesive keying of the resin.
8/ A method of constructing a rail track according to claim 1, wherein the track-receiving slab is obtained by casting a mass of wet concrete continuously along a determined path.