Transmission And Substation Foundations - Technical Design Manual

SECTION 7: DESIGN EXAMPLES

As can be seen from the Helicap® model, 99 kip can be attained using an RS4500.337.

then ensure the load to the piles is not greater than allowable. In this case, the wanted configuration includes 9 piles (all with 100 kip capacity) and located on a 3x3 grid. A sample pile layout can be seen in Figure 7-16.

LPILE/Hand Calc Method For this analysis, the cap is going to be considered fully rigid. The first step is to determine a pile configuration and spacing,

PILE LAYOUT

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Anticipated Pile Layout Figure 7-16

Because this example assumes the load can act in any direction, it is necessary to determine the worst case loading for this pile layout. In this case, two scenarios will be

evaluated. In one case, the load acts along the lines in the grid. In the second case, it acts at a 45 to the first case. The two layouts can be seen in Figures 7-17.

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