Simulation And Analysis Of Foundation Pit Pile Anchor Support Based On ABAQUS

With the rapid development of urbanization in China,the underground space resources are becoming more and more tense.The requirements of deep excavation are becoming more and more severe,and the control of the deformation of the foundation pit is more and more strict.The pile anchor support is widely used in deep foundation pit support because of its economical and effective rationality,but its design and calculation theory needs further improvement.ABAQUS is one of the world's most powerful finite element software,rich unit mode,material properties,soil model and analysis process,the finite element numerical analysis of the powerful,and has strong adaptability to the deep foundation pit engineering.In this paper,the background and development trend of deep foundation pit support at home and abroad are expounded.The research status,mechanism and design theory of pile anchor support are discussed,and site monitoring of a deep foundation pit project is carried out.The use of ABAQUS Mohr-Coulomb plastic model and Drucker-Prager hardening model,according to the project site,the properties of soil boundary and load conditions of the ABAQUS numerical model and three-dimensional finite element numerical simulation method.The results of field monitoring are compared with the results of computer numerical simulation and the results of theoretical calculation.The feasibility of the finite element simulation for the project is verified by three examples.On this basis,considering the different parameters such as the spacing of the pile,the depth of the embedded pile,the angle of anchor cable and the value of prestressing force,the design idea of the pile anchor support is taken into account,so as to achieve the most effective,economical and reasonable design scheme.It will provide guidance for the design and construction of pile anchor support structure in deep foundation pit engineering.