Influence of Tunneling on Adjacent Existing Pile Foundation

Abstract

One of the important issues of tunneling in urban areas is the assessment of the impact on adjacent buildings of tunnel construction. Many high rise buildings are supported by pile foundations in major cities. Tunneling activities carried out adjacent to these pile foundations invariably cause ground movements, which in turn will impose axial and lateral forces on the pile foundations. The study focuses on the estimation of ground movements induced by tunneling (both vertical displacements and horizontal displacements) and the imposition of these soil movements on the pile and computation of the consequent pile responses. Tunneling induced behavior of piles was estimated using PLAXIS software. A parametric study was carried out for short pile in sand. Based on the parametric study, design charts were developed for short piles to estimate the tunneling induced behavior of pile easily.