ABSTRACT
The underground space of densely populated cities contains parts of buildings, utility installations, deep foundations, tunnels, and deep excavations. It is possible, and increasing more probable, that new underground constructions will be built within close proximity of existing pile foundations. This paper presents a framework for pile analysis to predict the consequences of new underground constructions on piles, specifically through the induced ground displacements, calculated using an analytical solution for a tunnel excavation. Pile deformations are calculated with a modified version of the load transfer method. Pile settlement is found to be inversely proportional with the distance from the tunnel. The calculated pile settlement was between 0.3 and 3% of the pile diameter for 1% volume loss during tunnelling.
