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25_HWKTTE 4004c - categories momentum conservation...

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15 Figure 3-1. Construction of Davisson’s Pile Capacity 1. Plot a line with slope representing the elastic deformation of the pile (Slope m): L AE m = (3-1) where A Cross-sectional Area of the Pile E Elastic Modulus of the Pile Material L Pile Length 2. Draw a line parallel to the elastic deformation line with an intercept, x, on the settlement (movement) axis given as
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16 120 0 . 4 D x + = (3-2) where D Diameter of Pile in millimeters x horizontal displacement of elastic deformation line in millimeters 3. The Davisson’s capacity (point D on Figure 3-1) is defined as the intersection point between the load-settlement curve and the elastic deformation line. Dynamic Methods Review Eight methods were considered in this study, which are subdivided in three
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Unformatted text preview: categories: momentum conservation, combined wave mechanics with energy conservation, and wave mechanics alone. The methods are the Engineering News Record (ENR), Modified ENR, FDOT, Gates, Paikowsky, Sakai (Japanese), Pile Driving Analyzer (PDA) and the Case Pile Wave Analysis Program (CAPWAP). In the following sections, a brief description of each method is presented. Momentum Conservation ENR One of the older formulas developed to estimate the driven pile capacity was the formula published in the Engineering News Record (ENR) (Coduto after Wellington, 1994). It has since become known as the Engineering News Record formula:...
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