Research On Analysis Method Of Internal Force And Displacement Of High Support

This paper is based on the National Natural Science Foundation Project "Research on Bearing and Deformation Behavior of Tandem Anchor Plate under Static and Cyclic Loading" hosted by the tutor.After summarizing and sorting out relevant literatures at home and abroad,it systematically studies theoretical analysis and influence factors of support structure of anchored sheet pile wall and chair type double row pile by means of combination of field monitoring,theoretical analysis and numerical simulation.The following are the main research contents and conclusions:1)Based on two-parameter foundation beam theory,soil mechanics and mechanical theory,the matrix equation between inner force and displacement of anchored sheet pile wall is established.This paper puts forward a new method to analyze inner force and displacement of anchored sheet pile wall through Matlab program.The field monitoring results are well comparable with the theoretical analysis results,so it lays a theoretical foundation for the popularization and application of this method.2)Based on Flac3 D software,the finite difference model of the interaction between anchored supporting structure and soil is established,and the distribution law of internal force and horizontal displacement is obtained.The result shows that the theoretical analysis is more consistent with the actual situation than the numerical simulation result.3)On the premise of ignoring vertical load transfer rules and spatial effect of piles and considering the basic idea of Winkler foundation beam,this paper combines the transfer matrix method with the finite element analysis of plane bar system to put forward a hybrid calculation for inner force and deformation analysis of chair type double row pile.Corresponding Matlab calculation program is developed and applied to practical engineering.Influence factors are analyzed at the same time.The engineering application result shows that the calculated displacement is in accord with the monitored displacement.Additionally,the theoretical calculation result is regular and comparable.It can be used as reference for design and calculation of support structure of chair type double row pile.