| In recent years, as the deep foundation of depth and large area appear constantly,SMW method is widely used in our country. But SMW method is still not perfect, in order to solve the problems above, it needs do further research on SMW foundation pit supporting theory and technique optimize.First, By theoretical analysis of SMW method related technology and finite element analysis of practical engineering this paper does the following researches:(1)H finances in Soil Mixed Wall is equivalent to a certain thickness of underground continuous wall by stiffness equivalence principle to compare the foundation pit horizontal displacement in two different retaining structure, analysis cement-soil contribution to steel soil mixing wall stiffness.(2) Analysis the effect of support, which is in concrete mixed with steel support system, pre-applied force and stiffness on foundation pit deformation and internal force.(3) Gone on support position optimize by sectional equivalent beam method and genetic algorithm with Maximum bending moment in retaining walls as objective function.(4) Simulate and analysis the main influences on steel recycling pulling force.Through the above analysis and research to get the following main results:1、Obtained cement-soil contribution to steel soil mixing wall stiffness.2、Analyzed the effect of support, which is in concrete mixed with steel support system, pre-applied force and stiffness on foundation pit deformation and internal force,and concluded a suitable value.3、With Maximum bending moment in retaining walls as objective function,Gone on support position in SMW method optimize by sectional equivalent beam method and genetic algorithm.4、 From the above analysis, it points out,when foundation pit supporting structure deformation is small,steel recycling pulling force is mainly composed of static friction between steel shapes and cement-soil and deformation resistance can be ignored,meanwhile this paper gave the pulling force calculation formula. |
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