Characteristic study on composite foundation with rigid-flexible piles under the load from embankment

This paper introduces a successful application of the composite foundation with low-strength-concrete pile and cement-mixed pile in Ouhai road of Wenzhou to alleviate bridge-head jump.Through pressure metre under embankment,the magnitude of pile-soil stress ratio and its variation with the time are measured,and the variation of pile-soil load share ratio with time is analyzed.Furthermore,the measured results in site show that the measured pilesoil stress ratio under flexible foundation is much less than that under rigid foundation.The conclusion can provide valuable preference for the design of the composite ground under embankment.