초록 ▼

A method and apparatus for forming a railroad grade crossing comprising a vehicular supporting structure formed by a plurality of precast slabs fixedly located between and on opposite sides of a pair of running rails. A variety of slabs are provided for accommodation of multiple, switch and curved s

A method and apparatus for forming a railroad grade crossing comprising a vehicular supporting structure formed by a plurality of precast slabs fixedly located between and on opposite sides of a pair of running rails. A variety of slabs are provided for accommodation of multiple, switch and curved sections of track, with each slab being adjustably positioned relative to the elevation of the rails by temporary shims located proximate each of the marginal corners thereof and carried on the longitudinally spaced railroad ties. A supporting bracket is provided for fixedly connecting the slabs to the running rail. The structure is subsequently supported on a plurality of initially deformable pads located on the railroad ties and which are compressed and preformed to accommodate all inconsistencies and irregularities of the ties. In installations involving signal control sections of track, the supporting bracket is insulated from the running rails whereby to preclude any interference therewith.

대표청구항 ▼

A method of providing a railroad grade crossing for a raIlroad comprising a pair of running rails supported upon a plurality of spaced apart ties which in turn are supported upon a roadbed, which includes the steps of, selectively placing a plurality of shim elements adjacent one of said running rai

A method of providing a railroad grade crossing for a raIlroad comprising a pair of running rails supported upon a plurality of spaced apart ties which in turn are supported upon a roadbed, which includes the steps of, selectively placing a plurality of shim elements adjacent one of said running rails and supporting said elements whereby the upper surfaces thereof lie along a predetermined imaginary plane arranged generally parallel to the upper surface of said running rail, selectively placing a plurality of deformable pads having a material which will harden in time adjacent said one running rail and locating the uppermost portions of said pads at least as high as said imaginary plane, orientating at least one precast slab adjacent said one running rail and above said shim elements and pads, and thereafter lowering said slab until it is supported above said roadbed upon said shim elements and simultaneously deforming said pads such that said uppermost portions thereof lie along said imaginary plane, and fixedly securing said slab to said one running rail and permitting the material of said pads to harden and thereby become a rigid support for said slab.