Effect of pile spacing on the behaviour of a pile group in laterally spreading soil
Despite significant recent progress, there are many aspects of the interaction between pile foundations and laterally spreading soil that are still not well understood, one of which is the influence of pile spacing on the response and performance of the foundation. The design and results of two dynamic centrifuge tests, conducted to directly investigate this relationship, are outlined here. In both tests, rigid rotation of the foundations occurred, apparently as a result of insufficient fixity provided to the piles by the dense base soil in which the pile tips were embedded. This suggests that pile tip fixity conditions must be carefully considered in the analysis and design of pile foundations in soils that may undergo lateral spreading.