A Study Of Green Construction Assessment Of Subway Engineering

This paper combines the evaluation contents of green construction,the main points of the subway project and practical research together,constructs ideas basing on PSR model,selects key indicators of green construction guiding the subway engineering construction and establishes the evaluation index system of green construction of subway engineering.Using MATLAB software as the carrier,the BP neural network model is used into green construction evaluation of subway project,and the model after training,prediction and verification is used for engineering example to verify the scientific model again which demonstrates the effectiveness and feasibility of the index system and evaluation method,and provide reference for the construction of the subway Project Green further promotion and development.Firstly,study the relative theory of green construction,know about the nature of green construction and combine the green construction content and subway project features and clearly identify the subway project green construction which follows the way of combining green construction technology and green construction management,follows the thinking of sustainable development,follows the principal of reduce,reuse,recycle and ultimately maximize the conservation of resources and protect the environment during the subway construction,follows the specific measures of four savings and environmental protection throughout the construction the planning stage began the whole process of construction until completion and acceptance,and points out that the main points of green management in the subway construction in the process of environmental protection,energy saving,water saving,land saving,material saving.Based on the questionnaire survey and field visits of some of the projects under construction and construction,the statistical data were collected and analyzed.On the whole,the application of green construction in the current subway construction is not optimistic and it is very important to strengthen the evaluation of the green construction of the subway project.Study on the theory and practice of the green construction of subway project to prepare for the establishment of the index system of subway engineering.Secondly,since the green construction evaluation index system of the subway project is not mature,this paper constructs the evaluation index system of subway engineering framework green construction based on the PSR model,combined with the actual situation of subway engineering,and gives its new meaning.In the evaluation index system based on the PSR model of the subway project in green construction: "pressure index" refers to the construction activities from the subway construction on the pressure of the natural environment,which is mainly composed of the construction scheme selection and resource consumption of energy pressure in two aspects;"state index" indicator to reflect the impact of subway construction on the ecological environment,including water,gas,noise and solid waste;"response index" is able to deal with environmental problems and effective measures of subway construction and improve the level of green construction.According to the three aspects of pressure,state and response,this paper constructs a framework model of green construction evaluation index system,which includes a total of 22 indexes.In order to facilitate the evaluation,the evaluation indexes are divided into five grades,and the evaluation indexes are quantified.Next,through comparative studies of the advantages and disadvantages of common green construction evaluation model,the BP neural network has strong objective attributes and fault tolerance in the establishment of evaluation system,can overcome the AHP method,fuzzy evaluation method and the traditional grey system evaluation method of different degree of subjective factors,the original data of science processing,extract its essence from different experts thought,and it is feasible to evaluate construction of subway different sections with the help of MATLAB software.Therefore,based on the BP neural network algorithm in MATLAB software learning,combined with the research obtained 15 subway project engaged in subway construction technology for evaluation of the scoring,invite relevant technical experts to give a comprehensive score of 15 metro project,15 group of sample data,the establishment of a basic model of three layer BP the neural network,the former 12 groups of sample data for the BP neural network training and optimization,the verification of the model for the 3 groups of data,through the expert evaluation of the actual value and BP prediction analysis value comparison,reflects the model isscientific and reasonable and operable.Finally,the validated model uses for project-Wuhan Subway Metro Line 7 and2 section of Changfeng station project and the evaluation result was found,at the same time,once again proved the green construction evaluation and BP neural network model based on the subway engineering science is established.Through the practical investigation and research on the project,the difficulty of project construction and engineering characteristics is explicit,and invited the technical director of the project scoring the index in the green evaluation index system.The score matrix of the green construction index is input into the mature BP neural network model,and the comprehensive evaluation score is obtained through the operation.The evaluation results show that the method is effective and feasible,and provides a new field and platform for the green construction evaluation of subway engineering and construction projects.It is of theoretical value and practical significance to construct a scientific evaluation system for green construction of subway.Because of the long-term nature and complexity of Metro green construction,later will be popularized in the subway engineering green construction work on research,research from more cities,select more representative data,the index system is further improved,the evaluation model is more accurate optimization,so as to be faster and promotion used in subway construction practice.