The Static And Dynamic Finite-element Analysis Of The Pile-net Composite Foundation

In pile-net composite foundation, pile, net and soil are working together toundertake the load. It has many functions such as pile,bedding cushion, abstraction ofwater, reinforcement and protection. The deformation of pile-net compositefoundation than the normal foundation is little and the residual settlement is easy to becontrolled. It can reduce the fabrication cost and the number of the piles. It is amethod to improve deep deposite of soft organic soils, has been used broadly recentlyyears. The method is employed in the aspect of high way embankment, rail wayembankment, civil engineering ground treatment. But the Mechanical Mechanism ofpile-net composite foundation, in especial for the mechanism action of motive poweris still need more researches.In this paper about the study of the pile-net composite foundation is that:①In this paper introduce the basic definition and the constituent of the pile-netcomposite foundation, At the same time, give the introduction for the reinforcedmechanism of geosynthetic, the nets-soils synergy, the effect of the cushion and thesoil arching between piles.②Apply the finite element software plaxis to analysis the static of the pile-netcomposite foundation. Under the different reinforcement circumstance, calculate theinfluence of the modulus compressibility of cushion, pile spacing, the moduluscompressibility of soil between piles and the reinforcement materials tensile stiffnesson differential settlements and pile-soil stress ratio, puts forward the design theory ofbasis and engineering control method of pile-net composite foundation.③Using the finite element software plaxis analysis the dynamic response ofpile-net composite foundation under the earthquake effect, calculate the fracturesurface of the pile-net composite foundation and search after the failure mechanism,and optimizing the reinforcement design of embankment, and draw the differentsafety coefficient under the different reinforcement.