Experimental study on pile-net composite foundation of red clay

The pile-net composite foundation,combining the advantages of vertical reinforcement and the horizontal reinforcement simultaneously,in which the pile-net-soil coordinates together affects and shares the embankment load effectively,is a reinforcement method that has complex mechaism.Through in-situ test of the red clay foundation of the railway line for passenger traffic line reinforced by pile-net composite foundation,some tests including the earth pressure of the base of the foundation,the deformation of the geogrid,the pore-water pressure as well as the settling of the pile and the soil are made.Though the results of the test,the paper obtains the result that the pile-net composite foundation of red clay need an iterative process to get balance.The result will be helpful to the further research of reinforce mechanism of the pile-net composite foundation,and provide the basis for perfecting the design method of the pile-net composite foundation in future.