Field experimental study on pile-soil stress ratio of composite ground under flexible foundation

Pile-soil stress ratio is an important parameter in the design of the composite ground. In this paper, the field measurements of the pile-soil stress ratio of the composite ground with DCM pile under embankment are carried out for Jieyang-Puning Expressway in Guangdong Province. The magnitude of the pile-soil stress ratio and its variation with the load and the consolidation time are measured. The measured results show that the measured pile-soil stress ratio is much more less than that under rigid foundation; it varies with load from decrease to increase first, then in the form of wave. The conclusion drawn can provide valuable preference for the design of the composite ground under embankment.