Study On Optimization And Optimization Design Of Deep Foundation Pit Support Scheme Based On Fuzzy Integral Theory

With the high-rise buildings and underground space in the city continues to develop.There are more and more deep foundation pit projects.A reasonable support design to achieve the purpose of reducing the cost under the premise of ensuring safety requirements.However,an unreasonable support design even if the cost is high,security is not necessarily guaranteed.Therefore,the optimization of deep foundation pit support design is particularly important.Deep foundation pit engineering is a very comprehensive system engineering.The preference of its support scheme is influenced by many factors.Some of these factors can be quantitative.While others are more difficult to get quantitative values.Such factors tend to have varying degrees of ambiguity.In view of this situation,this paper uses fuzzy integral theory,carried out the following research work.Firstly,the characteristics of fuzzy evaluation and evaluation of deep foundation pit support scheme are analyzed and studied.Based on the basic theory of fuzzy integral,the current Sugeno fuzzy integral is improved.The optimal model of deep foundation pit support scheme based on improved Sugeno fuzzy integral is given.The optimization model is used to analyze and analyze a certain engineering example.The feasibility and practicability of the model are verified.And select the soil nailing wall support program for the optimal program.Based on the optimal scheme,the basic principle of genetic algorithm is used to construct the mathematical model of the optimal design of soil nailing wall with the lowest cost as the objective function.And the Matlab toolbox is used to optimize the engineering examples.By comparing with the original design,the feasibility of the optimized design model is verified.The research results of this paper have certain theoretical value for the optimization and optimization design of deep foundation pit support scheme,Which is of practical value in improving the design of deep foundation pit support structure.