Cement Mixing Pile-Work Traits Composite Soil Nail Retaining Structures And Numerical Simulation

In recent years, the rapid development of urban construction, excavation technology has become a hot issue, due to the limitations and scope of pure soil nailing and composite soil nailing emerged. Cement mixing pile composite soil nailing support form is common, cement mixing pile can be used as sealing curtain, with a relatively low cost, short duration, small impact on the surrounding environment and so on. Theoretical studies but cement mixing pile composite soil nailing is relatively more backward engineering practice requires scholars, experts continue to develop and improve their design, calculation methods and theory. In this paper, the actual excavation engineering background, combined with finite element software PLAXIS8.2 on cement mixing pile composite soil nailing structure deformation and internal force analysis. The main contents are as follows:(1) Overview describes the formation and development of soil nailing technology and composite soil nailing technology, development and research status. Analysis of the cement mixing pile- working mechanism of composite soil nailing support structure, respectively, building excavation technical regulations and composite soil nail wall excavation discuss the technical specifications of the cement pile composite soil nailing stability checking method introduces distortion and deformation of the surrounding soil excavation supporting structure, and finally introduced Peck experience curve method to estimate the surrounding surface excavation of settlement.(2) With an engineering example, through on-site monitoring data were compared with the specification limits, analyze cement mixing pile composite soil nailing during deformation behavior.(3) Using the finite element software PLAXIS 8.2 of cement mixing pile- soil nail retaining structure complex finite element simulation, analysis of the variation of the deformation and internal force of soil nailing cement mixing pile composite soil nailing structure.(4) Data and the monitoring data obtained by the finite element calculations plotted graphs, while in stark contrast with the specification limit, summed up the law in order to verify the finite element model, the rationality of the correctness of parameter selection and design solutions. Ultimately concluded, I hope for the future cement mixing pile- Application and Research of composite soil nailing support structure has a certain reference and guidance.