Research On Design-Construction-Integrated Management Mode And Method Of Hydropower Engineering Based On BIM

With the extensive application of general contracting model in water conservancy and hydropower industry,integration of design and construction has been an effective measure to achieve cost decreasing,benefit increasing,management in a unified way and decision-making properly.The application of design and construction integration mode can give full play to the designer’s subjective initiative,reduce the management chain and management links between the participants,and avoid the waste of resources and low management efficiency caused by the fragmentation of industry management structure and process.However,limited by the current engineering construction system and construction technology in China,the engineering design and construction are independent into a system for a long time.The integration of engineering project design and construction is relatively low,and the construction results are often deviated from the design results.Based on the BIM(Building Information Modeling)technology and the extension of the IFC(Industry Fundation Class)of hydropower engineering standardization,combined with Web GIS,Internet of Things,digital twinning and other technologies,this paper studies the integrated management mode and method of hydropower engineering design and construction based on BIM.Finally,four innovative research results are put forward as follows:(1)The BIM-based integrated management mode of hydropower engineering design and construction is established.By analyzing the connotation,information characteristics,application characteristics and construction elements of the integrated management mode of hydropower engineering design and construction,and combining the business flow of hydropower engineering design and construction management and the information growth mode of hydropower engineering design and construction driven by BIM,the framework of the integrated management mode of hydropower engineering design and construction based on BIM is determined,and then the overall platform business logic architecture and basic support service architecture are formed.Thus,the contradiction of mutual restriction and disconnection of each link is overcome by digital mode.(2)A new BIM achievements interworking in different specialized fields and information extraction method is proposed by MVD(Model View Definition)and IFCOpen Shell.By analyzing the BIM expression principle of hydropower engineering and the expansion mode of hydropower elements based on IFC,the IFC expansion mode of hydropower engineering oriented to semantic expression,geometric expression and attribute set expression is formed.On this basis,combined with Autodesk Revit software and data exchange technology based on MVD,the extended IFC export of various types of hydropower elements is realized.Finally,the BIM management tool based on BIMServer is developed by customizing IFC parsing rules of IFCOpen Shell and BIM model data extraction process.The necessary information in IFC extension file of hydropower project is extracted,and the feasibility of the method is verified by geological information extraction.(3)A solution of lossless data exchange from extended IFC to Batched and parse by Web GIS.Based on the extended IFC expression method and the platform-based digital transfer mode,a Web GIS environment based on Cesium.js and high-precision terrain construction method is built for the application needs of the construction site environment in the construction stage.By customizing the expression rules of heterogeneous IFC data format and OBJ intermediate data format,the transformation from extended IFC to multi-level of detail Batched model and Web GIS end analysis method are formed,which realizes the effective transformation,storage and analysis of IFC extended expression information of hydropower elements,and ensures the information integrity and availability of digital transfer model in construction stage.Based on this,a set of digital transfer platform based on BIM+Web GIS is developed,and the platform application practice is carried out for the digital transfer case of design change results,which avoids the loss of some engineering information caused by model changes in the design change process,thus verifying the feasibility of the method.(4)An aggregation approach is put forward based on Dynamo and voxelization,which towards project management information,monitoring data and BIM in the construction stage.In view of the construction monitoring and management of hydropower projects,the Internet of Things(IOT)perception framework for construction process monitoring elements,safety monitoring elements and quality inspection elements is established.Based on BIM + Web GIS environment,the visualization of real-time monitoring information in construction process,the historical playback of monitoring information,and the visualization and real-time warning of safety monitoring information are realized.On this basis,combined with the digital transfer of BIM model and the spatial coordinate information of unit engineering collected in the construction stage,the BIM model decomposition method based on Dynamo is studied,and the parametric construction of actual unit engineering and the dynamic growth of project management information in the dam construction period are realized.Combined with the voxelization technology,the integration of BIM model unit engineering and IOT information is realized.Finally,in view of the business functional requirements of the construction process of hydropower projects,a monitoring and management platform for the construction process of hydropower projects is constructed,and the real-time control of the construction process by each participant is realized.Above all,towards digital handover and management of design and construction,a platform architecture is proposed,which takes BIM model as the carrier,extended IFC data schema as the link,Web GIS as the analytical environment,IOT monitoring as the means.The business flow and data flow in the process of design and construction management are communicated,and a standardized management process and a convenient and effective technical application system are formed,so as to improve the overall digital management level of hydropower projects.