Study On Bearing Capacity Of Highway Bridge Pile Foundation In Middle And Lower Reaches Of The Yellow River

According to the urgent need in the engineering practice,this subject is to study the key technical problems of the bridge pile foundation design in the middle and lower the Yellow River middle and lower reaches of the river.With a large amount of pile static load test based on the data of side resistance and end resistance of bridge bored pile in the Yellow River highway play characteristics and distribution under vertical load are analyzed systematically;the pile-soil interaction theory,using finite element method to analyze the different factors.The influence of bearing capacity of single pile:The effect of 1 length diameter ratio on the bearing performance of single pile of bridge is affected.According to the result of simulation analysis,the displacement of pile foundation is increased slowly in the process of loading of pile foundation.2 the influence of soil stiffness on the bearing performance of single pile bridge,the elastic modulus of soil soil at the pile side is increased gradually,and the ultimate bearing capacity is increasing,but the growth amplitude slows down after a certain value.based on statistical analysis,put forward reasonable parameters and based on the design theory and method of reliability theory.The research results of this project are of great significance and great social and economic benefits to improve the design theory of bridge pile foundation,optimize the pile foundation design of the middle and lower reaches of the the Yellow River river crossing highway bridge,improve the engineering reliability and guide the construction.