Describe the relationship between the capacity of a tested or analyzed pile and the driving record.

The Young’s modulus of the concrete of the piles is 75.8 GPa and the concrete unit weight is 25 kN/m3. If the hammer strikes the pile at 3 m/s, and the pile cushion has the same cross-sectional area of the pile with a modulus of 2×105 kPa and a unit weight of 7 kN/m3, complete the wave equation analysis of the pile after one impact. Set the problem up in an Excel spreadsheet to carry the calculations until the movement of the pile stabilizes. Plot the displacement of the pile versus time. Note, when calculating the pile spring only, assume an element length of 4 m. This is still long but using the actual element length will make your constant too small, impacting the damping. Note that if using software elements would be less than 1 m.

A proposed highway bridge will be supported by 180 piles, each about 18 m long. The design load per pile is greater than 1000 kN. The soil conditions are neither unusually good, nor unusually bad, and you have limited experience with other pile foundations in the area. Based on this limited information, determine the number of pile load tests required for this project. State the main objectives of pile load tests.

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