Dynamic Analysis of Plugged Pipe Piles in Clay
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چکیده
An open ended pipe pile can become plugged when sufficient frictional resistance is developed by the inner soil cylinder within the pile (soil plug), thereby preventing further intrusion of the soil into the pile. When plugging occurs in an impact driven pipe pile, a complex interaction between the pile and soil plug takes place, causing the propagating stress wave to undergo an abrupt change. Current dynamic analyses of piles are based on the one-dimensional wave equation (e.g. CAPWAP, TEPWAP). Although the wave equation has the capability to indirectly accommodate the inner soil cylinder, it does not accurately simulate the physical phenomena when the pile is plugged, causing the predicted capacity of plugged piles to differ from actual field observations.
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