Stability Analysis Of The Retaining Wall And Optimizing Of Support System Of SMW Method

SMW method is very promising and novel foundation pit mode, developed based on the deep mixing pile construction method. Even though the structure of retaining wall is simple, but the force mechanism is very complicated, at present, we have inadequate understanding of the working mechanism on the SMW method, should not analyze the composite structure from an objective theory.This paper analyzed deformation characteristics of SMW Retaining Wall under bending moment, derived formula of force and deformation of SMW retaining wall at various stages, and deduced the formula of stiffness of SMW Retaining Wall and formula of overall stability bearing capacity of section steel. Put forward SMW retaining wall design calculations according to the result of analysis.Proposed back-calculate moment by the deformation curve , according to the inclinometer curve of the SMW Retaining Structure monitored in deep excavation works, in this way, we can keep abreast of bearing capacity of section steel of the enclosure structure underground, take measures in advance to avoid accident caused by unreasonable design.Considering a variety of impact factors on the stability of foundation and support in detail, set up finite element model, simulated research the influence to horizontal displacement and internal forces of foundation ditch wall and the axial force of the support, when there is changes in Cement Mixing Pile diameter, the support section and the sequence of construction. Compared with the measured value and theoretical calculation results, showing that it is necessary for complex projects to make a finite element analysis and simulation taking into account soil structure and the role of the entire process of construction.