Abstract
It is known that installation of cast-in situ concrete structures such as bored piles and diaphragm walls may influence the properties of the adjacent soil. Installation effects are important because they may change the stresses applied to, and subsequent performance of cast-in situ bored piles and diaphragm walls. These effects have been studied using the finite element method. In particular the generation of excess pore pressures during construction and subsequent dissipation of these pore pressures have been examined using coupled consolidation analyses. A number of analyses featuring different variations of the construction process have been carried out. The results show that the in-situ stress regimes around bored piles and diaphragm walls do change due to installation and that there is only partial recovery with time.