An Assessment of Foundation Rocking Behaviour based on Field Observations

Controlled foundation rocking can be considered a satisfactory response to dynamic loading, as it can reduce the stress induced in the super structure, and it can reduce the required foundation size. This paper presents the results of a geotechnical assessment into the rocking behaviour of shallow foundations of a flying fox. The foundations of the flying fox were showing considerable rocking behaviour due to the dynamic loading effect when in use. This rocking behaviour was observed in the field, and the geotechnical aspects modelled using the methods set out by Pender et al. (2014). The results are then related to a more significant structure; a 550 tonne silo store. If rocking of this foundation had been allowed, then considerable material savings in the foundation construction could have been made.