Study The Influence Of Excavation On The Adjacent Buildings

High-rise buildings have sprung up in recent years and become the mainstream.Urbanization is one of the country projects,with the influx of the city’s increasing population,urbanization is intensive growing.In the dense living area,high-rise buildings are constantly heightening and the foundation is deeper due to the limited space.Foundation pit goes in the deep,large,close and difficult directions.It is considered that deep excavation meant to be that in 5 meters height and complex geological conditions,the surrounding environment and underground pipelines are complex which affects the safety of adjacent building foundations.Deep foundations in cities are mostly in dense buildings where the construction of the environment is more complex.some existing buildings,structures and underground pipe lines adjacent to deep excavations function and influence each other.If deep foundations in this environment were controlled improperly,it would induce a certain degree of impact on the surrounding environment or even affect the normal use and lead to serious destruction.Thus,in the process of foundation pit construction,we not only need to ensure the safety of foundation pit itself but also to ensure the safety of surrounding buildings.Built on the international summary about the deformation control and the influence of excavation on the surrounding environment,and on the basis of research results,this thesis further research the basic theory of nonlinear finite element and give analysis of deep foundation pit excavation in the construction process of the influence of adjacent shallow foundation frame structure.In order to obtain the developing laws of deep excavation adjacent to the frame structure,supporting structure and surface soil deformation in the process of excavation process,combined with actual project cases(Longquan Fuquan Engimeering),through large general-purpose finite element analysis software MIDAS GTS NX and in accordance with the actual project circumstances to build dimensional finite element numerical model,this paper analyzes the Deformation of retaining pile,ground subsidence,buiding deformation at each step in the process of excavation.At the same time,we analyzes its internal forces by using the same project model parameter modification topical,considering the distance from the building pit,building foundation embedment depth,diameter pile envelope,the impact of the basement,and the deformation and height of the building and other bonus corresponding load is applied to buildings.To provide the reference and basis for the foundation pit engineering through the analysis.