Measurement And Numerical Simulation Analysis Of The Common Action Of Pile-soil In Squat Silo Foundation

The pile base of large squat silos should not only bear the load of 100kPa to 160kPa,but also consider the requirements of the pile foundation which need s7 to 14 times a year to load and unload grain.China’s annual grain production of 600 million tons,with the increase of international food trade,the annual need to increase the construction of 10~4 magnitude grain silo construction.However,under the load of 100kPa to 160kPa,the study of the co-operation of squat silo pile-soil,the bearing base carrying capacity characteristic is not mature,and the actual settlement deformation of the pile base is not significantly contradictory to the relevant code.Therefore,it is of great theoretical and practical significance to study the large squat silo pile-earth co-acting,pile base carrying capacity,and sedimentation deformation,and to propose the plan to optimize the base layout of pile base.In this paper,the pile top counter force in the process of squat silos construction and trial operation is calculated by field test to calculate the average counter force of the top of the pile,the bearing capacity of the inner pile of the pile base,the carrying capacity of the pile-based surrounding pile;the load ratio of pile soil and the mechanism of the joint action of pile-soil.In this paper,the top counterforce of the squat silo construction and trial operation is monitored by field test,and the pile soil bearing characteristics,pile soil sharing load ratio and pile-earth cooperation mechanism are analyzed by the pile soil pressure.In view of the research background of this topic,the comparison analysis of the base settlement value and the measured value of squat silo pile is calculated by the equivalent effect of the hierarchical sum method and the deep base method of the equivalent entity,and some amendments are put forward to the two different calculation methods based on a large number of measured values,which provide some reference for the construction of squat silo.Using abaqus large finite element software ABAQUS to establish an integrated three-dimensional nonlinear numerical calculation model that considers the"silo wall-pile foundation-base"of pile-soil interaction,and by analyzing the change of pile top reaction force,the load capacity of the pile-to-pile soil,and the distribution characteristics of the carrying capacity:considering different geological conditions,under different pile parameters,the effect of pile-soil co-operation and settlement on the base of squat silo piles is proposed to optimize the pile base arrangement by the measured data and the integrated three-dimensional nonlinear numerical analysis of"soil wall-pile base-base".By optimizing the design of the squat silo pile foundation,the construction cost is reduced,and the construction of squat silo provides a certain reference.