Building Factory Oriented Detail Design And Computer Aided Construction System For Pipelines

With the development of construction industrialization in China, construction engineeringis also gradually transformingitself from onsite construction to factorial prefabrication process. Compared with the onsite construction mode, the factorialconstructioncosts a lot to build factories and buy equipments in the early period. But it can also shorten the whole construction period, reduce total cost, save manpower and material resource, and is friendly to environment. Therefore it attracts more and more attention and has been applied to many projects.Factorial pipeline construction is a mature part of current construction industrialization. The production process consists of several stages, i.e., detail design of prefabricated components, prefabrication processing, transportation, installation,and finally facilities delivery to operation and maintenance stage. However at present, this production process faces the following problems. 1) Factorialpipline construction is still in its infancy in China so that its working process and management methodare inperfect. 2) Withthe lack ofeffectiveintelligent detaildesign tools, thedetail designprocess heavily depends on theequipmentmanufacturers. 3) Information loss and redundancy, and data inconsistencies caused by paper-based or file-based information transfer. 4) Information isolation due to the lack of effective information sharing platform and methods. 5) Information distortion and loss result from an undeveloped communication between each stage and each participant.Building Information Model(BIM) is a digital model of the project and processbasedon 3D digitalmodel. Itintegrates variousinformationrelated toconstruction projects and products. BIM can effectively solve the problemscaused by information sharing and collaborative works in each stage and support the visualization,intelligent detail design.From the perspective of factorial pipeline construction, this research firstly studied the characteristics of the lifecycle process management of building pipeline factory. Then two key issues, i.e., detail design of prefabricated components and business process management for multi-participants were addressed, and corresponding methods were presented respectively.Based on these methods, a BIM-based solutionto factorial construction oriented detail designand computer aidedconstruction was porposed. Combining withsome early achivements of our group, a BIM-based information management platform(BIM-IMP) for building pipeline factory was developed. On this platform, there were mainly four systems,i.e.,a BIM-based detail design system for pipeline prefabricated components(BIM-FDD), a BIM-based computer aided construction management system(BIM-FC) for building pipelines, A BIM-based mobile system for factorial information management(BIM-FM) and a BIM-based intelligent facility management system(BIM-FIM). The BIM-IMP supported information sharing in each stage and provided a unified platform for the collaborative works among multi-participants. The platform was applied totwo large-scale projects and achieved desirable economic and social benefits,providing a good reference for promoting building factory and BIM technology.