Finite Element Analysis Shield Construction On The Upper Part Of The Building Affected

With the development of society and economy, people’s living standards continue to improve, travel pressure increases, a large public underground space have been used, the construction of the subway project is gradually increasing. Shield extensive use in the construction of the subway project engineering. Due to construction of surface subsidence caused by shield surrounding strata disturbed environment, resulting in the building of the road safety problem. The article by studying the basic theoretical knowledge pile, for wearing under the shield machine building, piles of soil caused by the complex interaction of soil, analyzing the safety of its upper part of the building. And in accordance with the actual geological conditions, Shenzhen Metro Line 9 project, build soil model construction process by simulating the dynamic range of the stress-strain state and pile shear shield construction progresses with the changing range, were finite element simulation analysis.Theoretical knowledge of introductory chapters main reasons for the formation of surface subsidence and other aspects of description, the model for the simulation of surface subsidence state shield dynamic construction results do theoretical groundwork. Overview article introduces the basic theoretical knowledge of the pile, the pile from the definition, classification, theoretical analysis and influencing factors on Pile pile and pile bearing capacity failure mode described various aspects, the model for pile the importance of determining the structure of shear safety in laying the groundwork.The core of the article is the finite element simulation of shield construction, were analyzed by the pile for shear stress and strain analysis of soil models, as well as shield segment in the construction phase of the stress and strain analysis of each state to determine its shield construction for security, whether the impact of the upper part of the building. In the core chapters of large geotechnical engineering finite element analysis software MIDAS GTS software as well as a brief introduction from the scope of the use of factors need to be considered, finite element modeling of dynamic simulation. Concept of stress-strain state of the soil due to take place in the numerical simulation of shield construction process changes, and changes in shear pile process, some of the difficulties encountered with regard to software, end to prospect, has been optimized to make two points of hope for the future.(1) Midas GTS software is not compatible with the existence of various versions of the problem, so often used in the process will be a variety of errors or crashes, the card screen problem, I hope this problem in the future could be a good solution.(2) the model established in this paper in order to be able to obtain the results intuitive, but now part of the necessary constraints of finite element numerical simulation model is applied in the initial build, in fact, complex formation with the stress of the situation is slightly different, does not create a completely accurate with the actual situation is absolutely the same simulation environment, I hope in future studies can be found in more optimal way to solve this problem.By the way, for the actual project has important reference for Metro Shield upper construction for finite element analysis of the impact of buildings, construction and reinforcement for future projects of the same type provided.