PREDICTION OF GROUND MOVEMENTS DUE TO PILE DRIVING IN CLAY

摘要: This paper evaluates theoretical predictions of ground movements caused by the installation driven (or jacked) piles in clay. The are based on an approximate analysis framework referred to as shallow strain path method (SSPM) that simulates undrained pile penetration from stress-free surface. Large conditions close solved numerically, and closed-form analytical expressions obtained small approximations at points further away. These results show that, for closed-ended cylindrical radius R embedment L, normalized displacements functions their dimensionless position x/L. In contrast, a planar sheet or unplugged open-ended pile, far-field soil x/L depend only wall thickness. proposed analyses favorable agreement with data variety available sources including field measurements building large groups; uplift driving adjacent within group; spatial distributions single (both wall), particularly detailed set laboratory calibration chamber. comparisons is capable reliably predicting deformations mass but generally underestimates vertical heave measured Further investigation suggests this discrepancy may be related occurrence radial cracks observed surface during consistent tensile horizontal strains computed SSPM analyses.