ABSTRACT
Recently, more and more twin tunnels are being constructed near piles with the development of metro system in cities. However, only limited research was carried out to study the effects of twin tunnelling on piles. In the centrifuge tests reported by Ng & Lu (2014), they investigated the responses of a loaded pile subjected to twin tunnelling at different depths located on both sides of the pile. It was revealed that the effects of the tunnelling sequence on the pile settlement and the loss of pile capacity were significant.
