. The elements of railroad engineering . s^ Cut Area= 30ft. Fig. 370. slight change in location, especially on a side hill line, canso greatly affect cost; and it is first cost which generally de-termines the success or failure of the enterprise. The accompanying sketches will afford some light where itis oftenest needed. Fig. 370 is an example of poor locationmore often met with than that of any other kind, and yetone where a little conscientious work, together with common. Fill Area-^ Fig. , would have produced amazing results, as shown in
. The elements of railroad engineering . s^ Cut Area= 30ft. Fig. 370. slight change in location, especially on a side hill line, canso greatly affect cost; and it is first cost which generally de-termines the success or failure of the enterprise. The accompanying sketches will afford some light where itis oftenest needed. Fig. 370 is an example of poor locationmore often met with than that of any other kind, and yetone where a little conscientious work, together with common. Fill Area-^ Fig. , would have produced amazing results, as shown in , which is decidedly good location. Side hills afford op-portunity for almost the cheapest form of construction. A 844 RAILROAD LOCATION. grade line, i. e., where the grade coincides with the surfaceof the ground on the center line, as in Fig. 371, can, unlessrock is encountered, be graded with pick and shovel alone,the men casting the material taken from the cut directlyinto and making the fill. The area of the cut in Fig. 370 sq. ft., while the area of the fill is but sq. ft., leavingan excess of excavation of sq. ft., or ten times the areaof the fill. There is no way by which this excess of mate-rial can be utilized; it must, therefore, be wasted, as hasbeen the labor of excavating it. By moving the center line4 feet to the right, we obtain the cross-section shown in , in which the calculated areas of cut and fill are as fol-lows: Cut, sq. ft.; fill,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
