Field study of bearing behavior of pile-net composite foundation

Pile-net composite foundation is a new kind of soft soil treatment method developed in recent years.Through the deformation compatibleness,the respective effects of pile,soil and net are initiated to control the residual settlement or differential settlement.According to the kind of pile,two experimental section are designed to make comparison to investigate the working mechanism of pile-net composite foundation under embankment loads,and analyze its settlement,load transfer,pile-soil stress ratio and internal force of net etc.The results show that:the pile-net composite foundation could reduce the settlement effectively;the load transfer ability of geogrid is better than that of soil arch;the maximum strain of geogrid,which occurs at the edge of pile cap,is just 1 %,the minimum strain occurs at the midst of two piles.The results provide the basis for the theoretical research and optimum design of pile-net composite foundation.