Research On Construction Project Of External Quality Of Visualization System Based On Bim

With the development of construction business in our country, many glorious achievements have been get, but many construction quality and safety problems have been appeared in recent years, which shows that the control and management of construction quality is not sufficient. Nowadays, the trend of construction is to high-rise、super high-rise、special-shaped building, traditional control and management methods is not appropriate any more.BIM is a milestone in the field of construction, it not just can realize the transition from two- dimensional abstract draw to three-dimensional stereoscopic space, but also provide new thinking and method for the management of construction quality and proceeding and cost, because of the application of BIM in virtual construction and integration management and share of information of BIM. 3D laser scanning is a new method in the field of scanning and has been applied in construction quality monitoring. Combining 3D laser scanning and BIM, using the advantage of visualization, can solve the above problem effectively.This paper mainly studies the application of construction engineering external quality visualization monitoring in the proceeding of construction and operation, with the technique of combining BIM and 3D laser scanning. In the proceeding of construction,firstly, with the support of high performance computer and other hardware facilities, using Revit software to convert two-dimensional abstract draw to BIM Model which involved all kinds of building information; Then, scanning the building subject in different period of construction with 3D laser scanning machine to preprocess the building engineering information, and guiding the preprocessed cloud data into Revit, which can generate BIM model in the proceeding of construction. By contrasting the designed BIM model to the BIM model got by 3D laser scanning, project participator can obtain the information about building quality without on the spot. In the proceeding of operation, combining BIM and structural analysis software, which can guide all kinds of external load date of finished building and BIM model into structural analysis software to fictitiously demonstrate the deformation process in the external load, the technical framework and process framework of visual controlling the deformation of external building quality have been came up.The achievement in this paper can treat the quality problem occurred in the proceeding of construction timely, real time monitoring the information of building quality; Providing the fictitious visual demonstration for the finished building deformation, which can convert the shortage of quality monitor in the proceeding of operation.