Study On The Long-short Pile With Thick Mixing Cement-soil Wall Composite Foundation

With the development of coastal land,it is urgent and necessary to develop a new technique for Soft-Soil foundation treatment.In 2016,Associate Professor Ping Yan developed a new technique for Soft-Soil foundation treatment--Long-short pile with thick mixing cement-soil wall composite foundation.This paper combines the theoretical analysis and engineering practice,and analyze and discussion the Long-short pile with thick mixing cement-soil wall composite foundation by numerical simulation analysis,so as to form perfect design theory and calculation method in the future.On the basis of research achievements of Long-short pile composite foundation,this paper combines the characteristic of Long-short pile with thick mixing cement-soil wall composite foundation and put forward the calculation methods of bearing capacity and settlement of Long-short pile with thick mixing cement-soil wall composite foundation.Through compare the calculation results of the bearing capacity and settlement of Long-short pile with thick mixing cement-soil wall composite foundation and the test results of actual field to verify the reliability of the calculation methods.In this paper,through the finite element software Plaxis3D to analyze the Long-short pile with thick mixing cement-soil wall composite foundation by numerical simulation,exploring working properties and its mechanism action of the Long-short pile with thick mixing cement-soil wall composite foundation.Meanwhile,this paper research the effect of some parameters,such as strength of soils,diameter of piles,length of piles and so on.And even compared the form of the piles,the best program of the Long-short pile with thick mixing cement-soil wall composite foundation is proposed.The results of numerical simulation indicate Long-short pile with thick mixing cement-soil wall composite foundation can bear the upper load and control the settlement effectively by changing the properties of long piles and short piles and locations of piles.The research results provide the theoretical basis for the further application of Long-short pile with thick mixing cement-soil wall composite foundation,which has realistic significance and practical values in terms of reducing workload and costs of Soft-Soil foundation treatment in the future.