Research on the Calculation of Bridge Flexible Pile Group Foundation Based on M Method
The pile foundation deformation and the internal force calculation are the foundation and basis of the mechanical calculation of the pile foundation.In this paper,a program for calculating the deformation and internal forces of a flexible pile group foundation based on the M method is compiled,and the accuracy of the program is verified by a case study and a third-party software.The differences between the calculation results of railway code and highway code on pile foundation are compared,and the influence of parameters such as free length and scale coefficient on pile deformation and internal force is discussed by using the convenience of program analysis,and the correlation between the position of the reverse bending point of pile moment and the free length and horizontal deformation coefficient of pile foundation is studied.In addition,relevant suggestions are proposed for pile foundation design work:(1)the free length of the pile foundation will significantly affect the internal force of the pile,and the accuracy of the free length of the pile foundation should be considered.(2)Do a good job of geological survey,and obtain the most accurate classification of each soil layer and the corresponding proportion coefficient M value.(3)When the soil layer contains weak soil or the free length of the pile foundation is small,the appropriate lengthening of the non full-length vertical steel bar of the pile head should be considered.
bridge pile foundationflexible pile groupprogramM methodinternal force and deformationdesign guidance
万方数据
维普
