초록 ▼

A method and apparatus for laying a railroad track includes laying, in tandem, a series of pre-cast concrete slabs on a prepared track bed, the slabs being isolated from the bed, and from each other, by rubber isolation pads, and the slabs having cavities formed on the top faces. The rails are held

A method and apparatus for laying a railroad track includes laying, in tandem, a series of pre-cast concrete slabs on a prepared track bed, the slabs being isolated from the bed, and from each other, by rubber isolation pads, and the slabs having cavities formed on the top faces. The rails are held above the slabs, in their proper location, by removable gauge beams having adjustment means to exactly locate the rails. Before filling the cavities with concrete the shoulder-pins, used to secure the rails, are located with their pin portions in the cavities by being removably secured to templates. The templates are held suspended above the slabs by being removably attached to a rail. The rails are used as guides after setting their exact gauge (separation), elevation and cant (angle of inclination) on the gauge beams, to determine the positions of the templates and shoulder-pins. The cavities are filled to the level of the templates with concrete and, after the concrete hardens, the rails are lifted, the templates are removed and rails are lowered into place.

대표청구항 ▼

A method of laying a railroad track having parallel rails comprising the following sequence of steps: (a) forming an elongated road bed for the track; (b) positioning, in tandem, a series of preformed concrete slabs along the track bed, each of the slabs having a bottom face facing the track bed, an

A method of laying a railroad track having parallel rails comprising the following sequence of steps: (a) forming an elongated road bed for the track; (b) positioning, in tandem, a series of preformed concrete slabs along the track bed, each of the slabs having a bottom face facing the track bed, and a top face with at least one cavity in its top face; (c) locating a series of elongated gauge beams above the slabs, each gauge beam adapted to temporarily hold a pair of rails at the proper height, gauge and cant relative to the slab on which it is located, each gauge beam being aligned across the direction of the rails: (d) positioning a pair or rails in the series of gauge beams and adjusting the rails to the said proper height, gauge and cant thereon by gauge beam adjustment means: (e) removably positioning a template over the slab cavity: (f) removably attaching a rail-holding shoulder pin, having a shoulder and a pin portion, to the template and to the rail so that the pin portion of the shoulder-pin is within the slab cavity and the template is held suspended above the cavity: (g) pouring concrete into each cavity up to the bottom face of the template and letting the concrete harden to securely hold said pin portion; (h) lifting the rails, removing the gauge beams and templates; and (i) lowering the rails and applying spring clips to the shoulder-pins so that the rails are gripped by the spring clips.