Handan City Wuan A Foundation Pit Supporting Design And Accident Numerical Simulation Study

Pile- anchor supporting structure due to the rapid construction speed, high safety performance and are widely used in deep foundation pit engineering.However, due to the inappropriate for survey, design, construction and precipitation and other issues, are likely to appear large deformation or collapse.Deformation of the retaining structure is too big or the collapse of the foundation pit is likely to increase the cost and time limit for a project, and the heavy casualties accident may occur.Therefore, geological survey, foundation pit design and construction of foundation pit engineering of security is not allow to ignore.Exampled by a certain foundation pit engineering accident of Wuan Handan city as the background, the main cause of foundation pit for foundation pit supporting design problem of the uneven settlement of adjacent buildings, combining with the engineering of the more representative pile- anchor supporting unit of study: the pile anchor supporting structure design calculation methods in detail, analyzing the security of the original foundation pit design scheme as well as the influence on deformation, then to redesign of foundation pit, and use MAIDAS/GTS to redesign the foundation pit supporting structure are simulated, and analysis of foundation pit and the displacement of retaining structure deformation.The main research content:(1) Were introduced in detail in this paper, the research background and significance, at the same time, the research status quo and characteristics of deep foundation pit engineering detailed elaboration, and the deformation characteristics of the pile anchor supporting structure and the working mechanism, design calculation method was introduced in detail.(2) In Handan city wuan a foundation pit engineering accident as an example, analysis of the foundation pit design on foundation pit deformation is too big and lead to the influence of the foundation pit accident, to the design of foundation pit engineering, compared with the old design of foundation pit supporting at the same time, by comparing the importance influence on the deformation of foundation pit design.(3) Application MAIDAS/GTS of the foundation pit engineering numerical model is established in this paper.Using the numerical model, the stress and displacement of soil, anchor axial force, displacement of retaining structure deformation analysis research on the several aspects such as, and to compare the actual monitoring displacement variation value and analysis, it is concluded that the new design of foundation pit supporting is a reasonable conclusion.