| With the development of economy and the acceleration of urbanization,the foundation pit engineering is facing austere challenges.The project should not only be safe and economical during the period of design,but also maintain stability in the stage of construction.Therefore the design optimization of foundation pit support structure,and the analyze and control of deformation trend of support structure in the construction period attracted great attentions in the field.On the foundation of the previous works,this paper accomplished the selection of the design schemes of foundation pit support structure,numerical simulation of foundation pit support structure under complex condition and real-time monitoring during construction of excavation,finally carried on a series of optimization design by using optimization theory which based on engineering example.The research method is as follows:firstly,several familiar supporting structure types and these features are introduction in this paper,secondly,by combining multi-objective fuzzy decision-making and analytic hierarchy process support scheme,this paper uses MATLAB language to design programmer of optimizing method,the application is used in practice engineering and the results showed that method is efficient,then,using MIDAS/GTS software to simulate the whole process of deep foundation pit excavation,the results indicated that the deformation value and tendency meet the requirements.Later analyzed the real-time monitor data,and compare it with the numerical simulation results,draw a conclusion that the reasonableness of numerical simulation calculation.In the end,a mathematical model of support pile-ring beam has been established,Particle Swarm Optimization tool of MATLAB is used to optimization design,and MIDAS/GTS is used to analyze the result.It proved that the Particle Swarm Optimization is useful in the optimization,and it can produce important benefit on economy. |
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