With the development and utilization of urban underground space, the layout of sewage treatment and reclaimed water treatment plants has gradually developed to semi-underground or all-underground. Huaifang Recycling Water Plant is an underground reclaimed water treatment plant built in downtown Beijing to alleviate the pressure of sewage treatment and improve the quality of water environment in the south of Beijing. Relying on the framework of "wisdom" engineering design system, the project explores a new way to combine BIM technology with municipal infrastructure construction. By using BIM technology, the project quality can be fully upgraded, the construction management level can be improved, the information resources can be reserved for the later operation of waterworks, and the public services such as urban infrastructure and urban green space can be provided. The construction and operation of the facility eventually turned the project into the world's largest all-underground recycled water plant, becoming a national model of "smart water plant".

Management of machine, electric and plumbing (MEP) plays an important role during operation and maintenance management of a building. At present, building automation system (BAS) is the primary means of MEP management, but the monitoring information of BAS cannot be effectively shared or used by other systems. Data sharing within building lifecycle can be achieved by adopting building information modeling (BIM) technology while most BIM researches and applications for MEP focus on establishing a product model that contains a wealth of information to improve the management efficiency by information inquiries. Few researches in the integration of BIM and MEP monitoring information are reported. By studying the integrated approach of BIM and MEP monitoring information, an extended model of MEP monitoring information can be established based on BIM. The model can provide data to support the operation and maintenance management of MEP, maximizing the value of MEP monitoring information.