Earthwork Computations

Figure 10-4.A cross section plotted on cross-section paper.

Engineering Aid 1 - Advanced Structural engineering guide book
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Figure 10-3.—Storm sewer plan and profile. understanding of horizontal and vertical curves. Those cross-sectional areas) and then multiply that average- will be discussed in the next chapter. Earthwork Computations Computing earthwork volumes is a necessary activity for nearly all construction projects and is often accomplished as a part of route surveying, especially for roads and highways. Suppose, for example, that a volume of cut must be removed between two adjacent stations along a highway route. If the area of the cross section at each station is known, you can compute the average-end area (the average of the two end area by the known horizontal distance between the stations to determine the volume of cut. To determine the area of a cross section easily, you can run a planimeter around the plotted outline of the section. Counting the squares, explained in chapter 7 of this traman, is another way to determine the area of a cross section. Three other methods are explained below. AREA BY RESOLUTION.— Any regular or irregular polygon can be resolved into easily calculable geometric figures, such as triangles and 10-7

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