Formulae for the Calculation of Railroad Excavation and Embankment and for Finding Average HaulGilliss Bros., 1877 - 106 páginas |
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Términos y frases comunes
applied approx ascer average haul borrow-pit centre height centre of gravity cols Columbia College column computation consecutive considered convenient corresponding breaks cross-section cut or fill decimal Devoe diagram difference distance divide by 54 earthwork elev embankment end areas end volume end-section equal error example excavation factors fading ends field-book full stas full widths Gillespie's grade line half widths haulage Henck's illustrated intersection irreg last break last interm level-section measurements mid-section monthly estimates notes obtain parallel plane pris prismoidal formula Prof quantities represent result ridge or hollow ridges and hollows road-bed rule Sb² side side-heights side-widths single vols slope and base straight line subtraction surface line TABLE OF OPERATIONS table of prods tical tion trapezoids triangle true content true vol V₁ values vanishing end vertical warped surface wedge width and centre widths and prods zero