Abstract: A foundation pile comprising a longitudinal through hole (1) and a plurality of crosswise through holes (2) transverse to longitudinal through hole (1) extending between longitudinal through hole (1) and the outer surface of the pile and optionally further comprising check valves positioned in the crosswise through holes (2), configured such that the crosswise through holes (2) and the check valves allow one-way communication from the inside of the pile to the outside of the pile from longitudinal through hole (1) to the outer side surfaces of the pile.

Abstract: 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).

Abstract: 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).

Abstract: The invention relates to a pulling machine for unloading and laying railway tracks, which moves by means of caterpillar tracks running next to the sleepers arranged on the setting bed, with the rail on the provisional supports arranged on the sleepers. The machine comprises a cabin and two caterpillar tracks and includes, in its rear tractor part, a pulling slide that comprises a tube with fastening elements, said tube sliding horizontally, actuated by a hydraulic cylinder comprising a piston connected to the tube, via three dismountable metal supports provided with teflon elements for facilitating the sliding, said metal supports being connected to steel elements acted upon by articulated arms generating the vertical movement by means of the action of another hydraulic cylinder, always maintaining the pulling direction. The machine pulls the rails without needing an auxillary track, maintaining the position of the track-laying train.

Abstract: The invention relates to a pulling machine for unloading and laying railway tracks, which moves by means of caterpillar tracks running next to the sleepers arranged on the setting bed, with the rail on the provisional supports arranged on the sleepers. The machine comprises a cabin and two caterpillar tracks and includes, in its rear tractor part, a pulling slide that comprises a tube with fastening elements, said tube sliding horizontally, actuated by a hydraulic cylinder comprising a piston connected to the tube, via three dismountable metal supports provided with teflon elements for facilitating the sliding, said metal supports being connected to steel elements acted upon by articulated arms generating the vertical movement by means of the action of another hydraulic cylinder, always maintaining the pulling direction. The machine pulls the rails without needing an auxiliary track, maintaining the position of the track-laying train.