BIM refers to the process, method and technology of creating and using digital technology to manage and optimize the whole process of design, construction and operation of construction projects.
It is based on three-dimensional digital technology and takes the database formed by three-dimensional model as the core, which not only contains the professional design ideas of various professional designers, but also contains the whole process information from design to construction to completion, use and final demolition, and integrates the engineering graphic model, engineering data model and behavior model related to management. Based on parametric design, it is an object-oriented, parameterized and intelligent digital representation of buildings, which supports various operations in building engineering and contains interrelated engineering information.
. The goals of "model equals drawing" and "model is higher than drawing" have been achieved.
It has five characteristics: visualization, coordination, simulation, optimization and drawing. BIM technology can not only realize the collaborative design in design stage, the integration of the whole construction process in construction stage and the intelligent maintenance and facility management in operation stage, but also break down the barriers and boundaries between owners, construction units and operators to realize the whole life cycle management of buildings. BIM is considered by many designers at home and abroad as the second revolutionary technology in the construction industry after CAD technology. Through software modeling, the real building information is parameterized and digitized to form a model. Based on this model, all project participants, from designers and engineers to the construction unit and the owner's operation and maintenance after completion, can uniformly call, * * * enjoy and gradually improve the digital model during the whole project cycle until the end of the project life cycle. The industrial application of BIM technology has remarkable economic, social and environmental benefits. The goal of information technology represented by BIM technology in the American BIM standard promulgated in 2007 is to "save 200 billion dollars for the American engineering construction industry every year by 2020". For the engineering cost consulting industry, BIM technology will be a subversive revolution, which will completely change the behavior mode of the engineering cost industry and bring a reshuffle to the industry.