Analysis And Application Of Mechanical Behavior Of Deep Foundation Pit Pile Anchor Support Structure

As China's urbanization process accelerates,high-rise buildings mushroom,and deep foundation pit engineering comes into appearance.Due to the unique regional characteristics of urban areas,the support demand of deep foundation pit engineering is more stringent.The pile anchor support structure is a commonly used form of support.The pile anchor support structure is a support system with support pile and anchor rope(rod).Featuring a suitable stress state,sound support effect,and relatively low engineering costs,the support system is widely applied in foundation pit engineering and slope treatment.In this paper,content of the following aspects are mainly discussed in the background of deep foundation pit engineering.1.This paper summarizes main content and basic characteristics of the deep foundation pit engineering,briefly analyzes the methods and key points for selecting the support structure of the deep foundation pit,points out that the pile anchor support structure is a commonly used form of support of the deep foundation pit,describes in detail the structure,working principle and applicability of the pile anchor support structure,and in this case,states the development status and problems of the calculation method of the form of support.2.This paper summarizes analysis and calculation methods of the current commonly used slope stability,landslide thrust,and geotechnical pressure,briefly describes selection of the latter two cases,and also summarizes the characteristics of foundation pit deformation,failure form and stability factors.3.This paper puts forward the coordination condition and calculation model of the improved pile anchor combination structure,elaborately deduces the calculation formula of cable tension,further learns the calculation method of internal force and deformation of anchorage section and load section,wherein the method is successfully applied to practical engineering,and also sums up main content of design stages,management procedures,and design of the deep foundation pit engineering support.4.This paper briefly introduces the content and control indexes of deep foundation pit engineering monitoring,offers a simple analysis of the actual on-site monitoring situation,and presents the concept and principle of informatization construction,wherein the concept and principle reflects the timeliness and necessity of the foundation pit monitoring project.5.Still using the project as an instance,this paper employs the finite element software Midas GTS to simulate the deformation of the foundation pit slope rockmass and the internal force of the support system at the final stage,and compares and analyzes the results of theoretical calculation,actual monitoring,and numerical simulation.6.In terms of the particularity of the project at the position of the stress arch,this paper applies the composite arch calculation model formed by the initial injection of the tunnel to the project,and computes the structure of the stress arch.