The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads; Containing a Large Collection of Rules and Tables, Original and Selected, Applicable to Both the Standard and the Narrow Gauge, and Prepared with Special Reference to the Wants of the Young EngineerD. Van Nostrand Company, 1890 - 339 páginas |
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Página 30
... slope of given inclination , beginning at the side of the road - bed , must needs intersect the ground surface . Formation slopes are usually stated in parts horizontal to one part vertical . Thus a slope of 45 ° is " 1 to 1. " A slope ...
... slope of given inclination , beginning at the side of the road - bed , must needs intersect the ground surface . Formation slopes are usually stated in parts horizontal to one part vertical . Thus a slope of 45 ° is " 1 to 1. " A slope ...
Página 31
... slope , and to ascertain its height above grade at the proposed section . This is usually done by refer- ence to the nearest bench , and pegging from stake to stake as the work progresses . Unless the ground is very steep , and the slope ...
... slope , and to ascertain its height above grade at the proposed section . This is usually done by refer- ence to the nearest bench , and pegging from stake to stake as the work progresses . Unless the ground is very steep , and the slope ...
Página 32
... slope must meet the ground . = 9. Suppose him , by either method , or even by random guess , to think that 10 feet for half the road - bed , and 10 more for the slope , looks about right . The formation slope being 1 to 1 , this implies ...
... slope must meet the ground . = 9. Suppose him , by either method , or even by random guess , to think that 10 feet for half the road - bed , and 10 more for the slope , looks about right . The formation slope being 1 to 1 , this implies ...
Página 33
... slope stake on the second or third trial , without conscious effort of mind . 11. Next , suppose the level at B , 25.5 feet above grade , com- manding the upper slope . Note the change of ground 11 feet out , and take a rod there ...
... slope stake on the second or third trial , without conscious effort of mind . 11. Next , suppose the level at B , 25.5 feet above grade , com- manding the upper slope . Note the change of ground 11 feet out , and take a rod there ...
Página 34
... slopes will meet 30 feet out . Of this distance , 7 feet are due to half the road - bed , and 23 feet to horizontal reach of the embankment slope . The slope being 1 to 1 , or 3 , the hori- zontal reach of 23 feet corresponds to a ...
... slopes will meet 30 feet out . Of this distance , 7 feet are due to half the road - bed , and 23 feet to horizontal reach of the embankment slope . The slope being 1 to 1 , or 3 , the hori- zontal reach of 23 feet corresponds to a ...
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Términos y frases comunes
A. D. MIN adjustment apex distance backsight called central angle CHORD column Cosine 1 Sine cross-hair Cube Roots decimal deflection distance degree of curvature degree of curve Diff divided engineer equal error Example feet figure fixed FOOD foregoing formation slope frog angle gauge of track gauge side ground Hence inches index angle instrument height intersection angle located logarithm Main frog dist mantissa mark measure method metres metric curve middle frog middle ordinate middle point minutes multiplied natural sine number corresponding observation opposite outer rail parallel perpendicular plane triangle Polaris quotient radii radius range REVERSED CURVE rule Sine 1 Cotang Square Roots sub-chord subtended Subtract Suppose switch-rail Table XVI tabular tance Tang tangential angle tangential distance telescope terminal tangent tion toe of switch transitman Trigonometry turnout curve vernier vertical ΙΟ