Research on the Offset Analysis and Disposal Measures of Bridge Pile Foundation in Deep Soft Soil Area
In response to the problem of bridge pile foundation damage caused by surface loading in deep soft soil areas,a typical case of elevated bridge pile displacement in a certain city was studied.Combining finite element calculation results and on-site inspection results,the displacement mechanism of bridge pile foundation in deep soft soil areas was elucidated.The study shows that uneven loading causes an increase in excess pore water pressure in soft soil,and the dissipation of excess pore water pressure leads to uneven settlement of the foundation soil.The main reason for the horizontal displacement and reduced bearing capacity of the pile foundation is the generation of horizontal loads inside the foundation soil and negative frictional resistance on the pile body;asymmetric loading and changes in drainage boundaries are potential factors that exacerbate the consolidation effect of soft soil;when the pile foundation has already deviated,the correction effect of surface unloading on the deformation of the pile body is significant;the integrity testing results of pile foundation based on PST and the displacement results of bridge piers have verified the rationality of finite element calculation.Based on the simulation results,the stress distribution characteristics of the pile body can be determined,providing reference for the development of bridge structural reinforcement plans.
pile foundation deflectiondeep soft soilloadingconsolidation settlementnumerical simulation
NETL
NSTL
万方数据
