Study On The Numerical Simulation Of Deep Foundation With Pile-Anchor Structure

With the rapid development of urbanization in China since1980s, senior andhigh-rise buildings continue to emerge, and the size of the building is also growing,making the city land area gradually reduce. Development and utilization of undergroundspace becomes imperative. Deep foundation has been rapid development.Geotechnical engineering geological condition, supporting structure andmechanical state of the soil are so complex, moreover, there are many influencingfactors, strong regional and risk. In the case of an accident, it would have anincalculable strong regional and risk. upon the occurrence of an accident, it would havean immeasurable consequences and a pernicious influence on society. so selecting thetype of support structure and the design of supporting scheme are the key to ensure theexcavation pit slope stability. Meanwhile, in order to know the deformation offoundation pit during construction, field monitoring is an important part of deepfoundation pit engineering. With the continue improvement of computer technologynumerical analysis and numerical simulation techniques are applied to the deepfoundation, and play an important role in resolving engineering problems.In this paper, it takes shijiazhuang zanglongguoji deep foundation engineering as aresearch background. First, analyze and summarize the results of previous studies ofdeep foundation, the characteristics and deformation mechanism of deep foundation,composition and characteristics of anchor-pile supporting structure are mainly analysed.Combined with the actual situation of the site and geotechnical survey data, using themanagement software for deep excavation(6.0) to design and calculate anchor-pilesupporting structure, and obtain the internal force and displacement of supportingstructure, settlement of soil surface and reinforcement of supporting structures and so on.According to the characteristics of this project, arrangement of monitoring points andcomplete the excavation site monitoring in accordance with the specificationrequirements, mainly to monitor the horizontal displacement of soil, surface subsidenceand internal forces of supporting structure, obtain the field monitoring result of eachmonitoring project, Using finite difference software FLAC3D to build a three-dimensional model, and simulate the horizontal displacement of soil, surface subsidence and the internal force of support structure during the process of excavation, then,analysis analysis of the simulative results. finaly, making a comparative analysis onnumerical simulation values, the value of software design and site monitoring values,the results obtained by the three methods are basically consistent, it illustrates thedesign of anchor-pile supporting structure is reasongable, the selection of parametersand established model are correct. Provide a meaningful reference for the study of deepfoundation pit engineering. It Provide a meaningful reference for the study of deepexcavation.