Research On Ontology Construction And Automatic Identification Of Safety Risks In Metro Shield Construction

Under the increasingly tense situation of urban land,the subway has played an active role as an integral part of the urban rail transit system.However,the safety problem of subway construction has always been one of the problems that is difficult to solve in the healthy development of the industry.There are problems such as an imperfect management system,backward management methods,and insufficient information methods,which cannot meet the safety risk management requirements of the complex and dynamic construction process of the subway..In order to solve these problems that restrict the development of the subway,this article relies on the strong semantic expression ability of the ontology to establish the subway construction safety risk ontology to help the reuse and update of risk knowledge;at the same time,in order to realize the automatic identification process of risks,it is based on normative construction Rules for identifying safety risks in subway construction.Finally,try to introduce BIM technology to complete the identification process.The main research work is as follows:This article combines the related research of domestic and foreign subway construction safety risk management,and puts forward the existing problems of domestic related research.On this basis,it proposes the use of ontology technology and BIM technology for subway risk management.(1)Construct the precursor information system based on the accident cause theory.Taking the tunnel section constructed by the shield method as the research object,the WBS level decomposition was carried out,and the possible risks were analyzed based on the step level and the cause theory.Through the analysis of construction activities and risk types,the precursor information system of four dimensions of human-thing-environment-management was established.(2)Established the safety risk body of subway construction.Five basic concepts and sub-categories of construction projects,construction activities,precursor information,risks and solutions were obtained from risk knowledge,forming a hierarchical structure relationship of ontology and using the Protégé ontology editor developed by Stanford University to build ontology models.(3)Establish SWRL identification rules to help automated identification of risks.For five common types of risks,a recognition and inference framework is established and SWRL is used to parameterize the recognition and inference rules,and this process is successfully implemented in Protégé.On the basis of Ontology,collect and summarize the relevant specifications through the regulation text,and further use SWRL language to parameterize the specifications to help realize the automated process.(4)Build a risk recognition logic framework integrating BIM technology and ontology theory.Based on the current situation,it is proposed to use the characteristics of BIM technology parameterization and visualization to introduce it into the automatic subway risk identification process.A logical framework model of the identification mechanism is designed and an automatic risk identification system framework is proposed accordingly,and the management page is simple Development.