An Intelligent Identification Framework For Rework Risk In A Prefabricated Construction Process Based On Compliance Checking Using BIM And Ontology

Prefabricated construction is a complex concurrent engineering.Compared with traditional cast-in-place construction,prefabricated construction system has many implementation links and complex interactions.A large number of studies and practices have shown that the prefabricated construction process lacks effective identification and control methods for rework phenomenon,and there are potential rework risks,resulting in cost overruns and construction delays caused by unnecessary waste.Therefore,it is necessary to grasp the whole process of prefabricated construction and study the management methods applicable to the prefabricated rework risk for improving the quality and efficiency of prefabricated buildings.Firstly,this paper proposes an intelligent identification framework for rework risks in prefabricated construction process based on BIM-ontology and compliance review,and introduces its overall design,conceptual system and workflow.The core of the framework are the rework risk integration ontology and the rework risk rule base.Secondly,by defining the scope of the prefabricated construction process,extracting the trigger factors for rework,and analyzing the propagation path of rework risk,this paper builds an prefabricated rework risk domain ontology that can systematically manage the professional knowledge of rework risk.And it extends the object classes and object attributes of the IFC standard to achieve multi-source heterogeneous data fusion in the BIM environment.Based on the EXPRESS-OWL mapping mechanism,IFC files have gained powerful data storage and knowledge reasoning capabilities through conversion to web ontology language,and establish the prefabricated construction process domain ontology.By comparing and matching the two heterogeneous domain ontologies mentioned above,an integrated ontology of prefabricated construction process rework risk is constructed.Moreover,the paper describes the three major functions of the intelligent identification framework for rework risk.The first function is rework risk compliance review based on SWRL.By structuring the comprehensive collection of prefabricated specifications,a rework risk rule base is established to intelligently screen for nonconformities in the construction process and determine rework risk events.The second function is risk information inference classification based on Hermi T,and the third function is risk information retrieval query based on TBOX and ABOX.To form a human-machine-readable shared knowledge platform that helps users free themselves from the burden of redundant information and easily acquire a large amount of detailed rework risk expertise.The three major functions include risk object monitoring,risk type identification,risk factor tracking,risk path analysis,and risk measure query.Finally,the above results are applied to a prefabricated construction project in Hainan Province,verifying the effectiveness of the intelligent rework risk identification framework based on compliance review.The intelligent identification framework of prefabricated construction rework risk determined in this paper deepens the application of computer methods with data interoperability and interactivity in prefabricated construction,and has practical application value for scientifically guiding the rework risk prediction in prefabricated construction process,reducing waste in project construction,and improving the management system of prefabricated construction.