Multi-objective Optimization Of Engineering Projects With Safety Factors

With the steady development of China's construction industry,the engineering projects are becoming larger and more complex,and the corresponding engineering project management level is improving day by day.And the research of project objective optimization has always been the focus and hotspot in project management.There is a unity of opposites among the objectives.It is necessary to coordinate and optimize the control of multiple objectives,and one of them can not be overemphasized.In addition,the construction process of engineering projects is often subject to safety risk pressures from many aspects.Therefore,this paper mainly combines multi-objective optimization theory and construction safety risk management theory to carry out research.Starting from the study of multi-objective optimization theory and the idea of safety risk management,this paper establishes a comprehensive optimization model of time limit-cost-safety risk.Based on the actual engineering analysis,the optimization objectives are determined,and the relevant parameters are substituted into the theoretical model.Particle swarm optimization algorithm is designed to solve the problem,so as to verify the scientificity and applicability of the model.The main research contents and achievements in this paper include:(1)Establishing a time limit-safety risk optimization model.By studying the qualitative relationship between time limit and safety risk,it can be concluded that the relationship between them is a quadratic function relationship,and a time limit-safety risk function model is established.(2)Construction safety risk quantitative evaluation model is constructed.Firstly,the Zhenan Pumped Storage Power Station is decomposed into 15 work units by the work decomposition method,and the construction safety risk is decomposed into 14 safety risk factors according to HSE system according to the engineering practice.Then,based on the work condition risk evaluation method,the quantitative evaluation model of construction safety risk is established,and the overall construction safety risk value of the upper reservoir project is determined.(3)Taking the upper reservoir project of Zhenan Pumped Storage Power Station as an example,the engineering demonstration is carried out.On the basis of establishing a comprehensive optimization model of time-cost-safety risk,the model is validated with practical cases and solved by particle swarm optimization.The optimized construction period of Shanghe Reservoir Project is 48 months,which is about 30 days shorter than the planned construction period,and the cost is reduced by 95.1267 million yuan.The safety risk is reduced from moderate risk to general risk,as a whole.The results were satisfactory.Through research,it can be found that the time limit-cost-safety risk integrated optimization model established in this paper has certain applicability and scientificity,and provides new ideas for safety risk management and multi-obj ective optimization research.