A railroad renewal method includes, in particular: the removal of the old rail, the installation of the new rail and the primary adjustment of the temperature of the new rail to a set value at a point located upstream of and close to the attachment area on a crosstie. The thermodynamic behavior of the intermediate section of the new rail located between the primary temperature adjustment point and the attachment area is controlled by way of a device, provided with a control and management system, such that the temperature of the new rail is uniform, in the cross-section thereof, at a set value on the attachment point.

A fish plate clamp for unloading rails 1. The fish plate clamp includes a support element (11, 12) with a first piece (11) and a second piece (12) each one located on a face of the rail (1). Each piece of the support element (11, 12) includes an internal mortise (13) in the area of the web (3) of the rail (1). The fish plate clamp also includes a gripping element (14) located in an internal mortise (13) of the support element (11, 12). The internal mortises (13) have an inclined surface (15) in a manner that, when the gripping element (14) moves along the length of the inclined surface (15) of the internal mortise (13) in the direction of the pull of the rail (1), the gripping element (14) latches onto the web (3) of the rail (1).

A fish plate clamp for unloading rails 1. The fish plate clamp includes a support element (11, 12) with a first piece (11) and a second piece (12) each one located on a face of the rail (1). Each piece of the support element (11, 12) includes an internal mortise (13) in the area of the web (3) of the rail (1). The fish plate clamp also includes a gripping element (14) located in an internal mortise (13) of the support element (11, 12). The internal mortises (13) have an inclined surface (15) in a manner that, when the gripping element (14) moves along the length of the inclined surface (15) of the internal mortise (13) in the direction of the pull of the rail (1), the gripping element (14) latches onto the web (3) of the rail (1).

A clamp assembly for supporting multiple elongate rails in a rail tie-down car utilizes spring-loaded, hydraulically actuated clamp assemblies to clamp individual rails to the tie-down car. Each clamp assembly incorporates at least two clamp members which act opposite one another to prevent the rail secured in place by the clamps from sliding in either longitudinal direction.

A clamp assembly for supporting multiple elongate rails in a rail tie-down car utilizes spring-loaded, hydraulically actuated clamp assemblies to clamp individual rails to the tie-down car. Each clamp assembly incorporates at least two clamp members which act opposite one another to prevent the rail secured in place by the clamps from sliding in either longitudinal direction.

The invention refers to a fish plate clamp (10) for unloading rails (1), that comprises a support element (11, 12) that comprises a first piece (11) and a second piece (12) each one located on a face of the rail (1), characterized in that: each piece of the support element (11, 12) comprises an internal mortise (13) in the area of the web (3) of the rail (1), a gripping element (14) of the rail (1) located in an internal mortise (13) of the support element (11, 12),
where the internal mortises (13) comprise an inclined surface (15) in a manner that when the gripping element (14) moves along the length of the inclined surface (15) of the internal mortise (13) in the direction of the pull of the rail (1) the gripping element (14) latches onto the web (3) of the rail (1).

The invention refers to a fish plate clamp (10) for unloading rails (1), that comprises a support element (11, 12) that comprises a first piece (11) and a second piece (12) each one located on a face of the rail (1), characterized in that: each piece of the support element (11, 12) comprises an internal mortise (13) in the area of the web (3) of the rail (1), a gripping element (14) of the rail (1) located in an internal mortise (13) of the support element (11, 12),
where the internal mortises (13) comprise an inclined surface (15) in a manner that when the gripping element (14) moves along the length of the inclined surface (15) of the internal mortise (13) in the direction of the pull of the rail (1) the gripping element (14) latches onto the web (3) of the rail (1).

A procedure for laying railway tracks on a trackbed on which sleepers (20) are located, that comprises at least the following steps: a) approach of a track laying train (30) with the stretches of rail (1) to be laid in the laying area; b) joining of the pairs of rails (1) to the consecutive rails (1) by means of tractor plates (200); c) unloading the pairs of rails (1) from the track laying train (30) onto the bed; d) squaring of the sleepers (20) by means of a squaring device; e) joining of the consecutive pairs of rails (1) by means of a joint plate (100); f) unloading of ballast in hoppers onto the bed; g) tamping of the rails (1); h) profiling of the ballast by means of a profiling device (400); i) welding of the rails (1).

A procedure for laying railway tracks on a trackbed on which sleepers (20) are located, that comprises at least the following steps: a) approach of a track laying train (30) with the stretches of rail (1) to be laid in the laying area; b) joining of the pairs of rails (1) to the consecutive rails (1) by means of tractor plates (200); c) unloading the pairs of rails (1) from the track laying train (30) onto the bed; d) squaring of the sleepers (20) by means of a squaring device; e) joining of the consecutive pairs of rails (1) by means of a joint plate (100); f) unloading of ballast in hoppers onto the bed; g) tamping of the rails (1); h) profiling of the ballast by means of a profiling device (400); i) welding of the rails (1).

In order to fix a rail of a rail track using a rail machine, the rail machine is moved in a working direction so that at all times a portion of the rail which is not attached to a cross-member of the rail track passes through a thermal conditioning zone of a thermal conditioning device of the rail machine, a temperature of a surface region of the portion of the rail passing through the thermal conditioning zone is modified using the thermal conditioning device by generating a non-homogeneous temperature distribution in the portion of the rail, and the portion of the rail is fixed to a cross-member of the rail track, after modification of the temperature of the surface region of the portion of the rail, without waiting for the temperature distribution in the portion of the rail to be homogenized.