Engineering Application And Analysis Of Cushion Reinforcements And Surrounding Soil In Composite Foundation

The foundation mechanism of the cushion is elaborated in this Paper. Through the cushion,the stress ration of pile to soil is coordinated,and the stress concentration can be eased. Hence,the potential capacity of the composite foundation is harnessed and the construction expense is decreased. It's found that there're most fitting cushion elastic modulus and cushion thickness.Various calculation methods for ultimate capacity of composite foundation are compared,and methods for computing the correction coefficient in Liu zhirong method is put forward. Further discussion is made on the change coefficient of the soil strength,which makes the formula more practical in engineering practice.The status and development of settlement analysis methods of composite is sununarized and compared in the paper. A fresh formula,which concems the composite modulus with the ultimate capacity, is deduced. Furthermore,a new settlement analysis method is introduced with engineering justification.The paper has analyzed the model of optimization composite foundation and discuse the rigid pile composite foundation in the rigid pile load, and settlement calculation. So we know, in the rigid pile load, the stress ration of pile to soil, the thickness of cushion, the model of cushion, the ratio of the pile length and pile dength, model ration of pile to soil and ration of displacement has the fixed law. Finally combining the research put forward reasonable calculation with the compound module.