The Trackman's Helper: A Handbook for Track Foremen, Supervisors and EngineersClark book Company, Incorporated, 1917 - 410 páginas |
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Términos y frases comunes
adzed allow amount angle bars ballast bolts bored bridges broken cause cent Concrete construction cost creeping cross cross drains culverts curve dirt distance ditch elevation embankment engine fastenings feet fill flange flat car foreman frog gage gang grade gravel ground guard rail hand car handle Head blocks holes inches inspection joints keep kinks labor laid load loose machine main track material method miles per hour move necessary plates plow proper pull rail length railroad Railway removed renewals repair road roadbed roadmaster screen screw spikes Section foremen shims shovel side track signals snow fence snow plow snow sheds speed splices standard steel stone surface switch points tamping tangent throw tie plates timber tion Track foremen track rails trackmen traffic train trams turnout unloaded weight wheel whistle posts wire wood yard
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Página 141 - General : When not surfacing out of face, as in case of picking up low joints or other low places, the general level of the track should not be disturbed. Where the rails are out of level, but where the difference in elevation is not excessive and is uniform over long stretches of track, a difference in elevation between the two rails of J^-jn.
Página 140 - Tamp each tie from 18 inches inside of the rail to end of tie with handle of shovel or tamping bar. If possible, tamp the end of the tie outside of rail first and let train pass over before tamping inside of rail; give special attention to tamping under the rail; tamp center of ties loosely with the blade of the shovel ; the dirt or clay between the ties...
Página 160 - As the vibratory motion of the rail takes place something has to give way. If the fastening to the tie is by push bolt or lag screw, the tie will be raised with the vibration and "pump" the ballast, and in time the fastenings will become loose.
Página 158 - The foundation of all ties being loosely compacted material, any movement or " churning " of the tie necessarily throws unequal loading on the ballast at different times, causes its compression and movement, and destruction of the tie foundation. The wider the ties and the lighter the rail and the heavier the loads, the greater such movement must be. Rails take a permanent set, as regards...
Página 261 - ... (3) Line and full spike the unbroken side on new ties and spike the guard rail to proper position. (4) Couple up frog and...
Página 325 - When car trucks are sunk in soft ground at a wreck, and there is no derrick car or other lifting apparatus at hand, a good way to handle them is to place a tie cross way in the ground, about four or five feet from the truck, then place two more long ties or timbers, with their centers resting across the first tie, and their ends in front of the truck wheels. The truck can then be pushed up on top of the long ties as if on a track. When it is centered over...
Página 58 - Holes should be bored somewhat deeper than the length of the screw spike. There is no serious objection to boring the holes clear through the ties." 13. " Not only is the lateral and vertical resistance of a screw spike greater than that of a cut spike when both are first applied, but the lateral and vertical resistance of a loose screw spike is considerably greater than the lateral and vertical resistance of a loose cut spike.
Página 149 - B" section. The radius of the web is smaller, thus producing more of a buttress where the head and web join. The experience of the Pennsylvania System seems to be that with their heavy wheel loads and dense traffic, and with the grade of steel that it is now possible to get in rails, more rails fail from crushing and disintegration of the head, apparently due to the pounding of the traffic, than from any other one cause, and accordingly in this section, the maximum effort has been made to strengthen...