Study On Construction Safety Risk Management Of Subway Based On Ontology

With the acceleration of urbanization process,the scale of subway construction project is increasing year by year.However,the intersecting and complexity of the subway technology and the particularity of construction environment lead to frequent accidents in subway construction.In particular,similar incidents happen repeatedly in similar situations,the Subway construction safety problems need to be solved immediately.As a representation carrier of knowledge in the field of research,Ontology realizes the structural preservation and the continuous accumulation of knowledge in the field of research,enables knowledge to be shared and reused among different people and organizations.It plays a great role in improving the present situation of subway construction safety risk management.Based on this,the paper integrates ontology and ontology Rule-Based-Reasoning and Case-Based-Reasoning into the process of subway construction safety risk management,to improve the subway construction safety risk management level,reducing safety accidents happen repeatedly.Firstly,by analyzing the safety risk management process and method of subway construction under the traditional perspective,it is proposed that effective preservating,sharing and reusing of experiential knowledge is an important way to improve the safety risk management of existing subway construction.Based on this,this paper analyzes the application of ontology and knowledge base,Rule Based Reasoning and Case Based Reasoning based on ontology,it concludes that ontology is suitable for the effective preservating,sharing and reusing the experiential knowledge in the process of subway construction safety risk management.Secondly,this paper make clear that the mechanism of subway construction accident,and puts forward the key function of risk factors and their transmission functions on construction accidents.By taking cases of subway construction accidents collected as data support,this paper adopts the method of grounded theory to built the risk factor index system of subway construction accident.Then it simplifies the transmission functions between the risk factor and the construction accident by using the nonlinear mapping relation method,and quantifies the nonlinear mapping relations by the rule support and the rule confidence.It lays a foundation for building the domain ontology repository of subway construction safety risk and the rules of rule reasoning module.Thirdly,this paper puts forward the "3W1H" method to restore the expert experience in the field of historical accidents.Then summarizes the advantages of building the domain knowledge repository based on ontology.It builds the domain ontology repository in the Protégé,which includes cases of subway construction accidents and experiential knowledge in related fields,as the foundation of the data layer of the safety risk management model of subway construction based on ontology.Finally,this paper optimizes the traditional subway construction safety risk management mode,designs the safety risk management model of subway construction based on ontology,completes the hierarchical and modular design of management model,which includes application layer,business logic layer and data layer.Based on the Jess,this paper constructs the Rule-Based-Reasoning module of business logic layer,with the help of SWRL language,it completes the construction of rules in Rule-Based-Reasoning business module.Then it builts the Case-Based-Reasoning business modules based on entropy method and comprehensive similarity computation.Supported by the data base of management model,which is the core of domain ontology knowledge base.It designes the business logic layer workflows,which integrates Rule-Based-Reasoning and Case-Based-Reasoning,supports model application layer to realize the identification of risk factors in the field,analysis of risk factors and safety risk control.Relying on specific project cases,this paper verifies the feasibility of sharing and reusing the experience knowledge of the safety risk management model of subway construction based on ontology.The research is of reference to improving the risk management of subway construction safety,avoids repeated occurrence of safety accidents and reduces accident losses.It is of great significance to improve the safety risk management level of subway construction.