The application of foundation pit 5D monitoring and 3D geological model technology based on BIM increased the work efficiency and reduced the man-made omission effectively of safety monitoring during the process of foundation pit construction depending on the visual method. At the same time, in this project, the application of new demonstrating technologies and mobile media equipment such as 3D GIS, 3D laser scanning, 3D printing, AR, VR, Google Glass and so on made the safety monitoring during the process of foundation pit construction operated by project managers, supervisors, monitors more effective. The extended application of BIM technology on the foundation pit safety monitoring of the Poly Plaza explored a new method about foundation pit safety monitoring, and it also provided a useful reference on the application of BIM technology during the whole process of construction of foundation pit engineering.

The living area in construction site is the area for the construction workers temporary living and resting.The large number of workers on the construction site results in a high-density, complex-sourced and rapid-turnover living area, which possesses many hidden dangers with large potential safety hazards. Therefore, the fire safety management in the construction living area has become a key point for safe and civilized construction of construction companies.By using the 3D model and virtual reality technology, this paper designs a virtual reality scene of living area which can experience fire escape in virtual reality.This scene allows the construction workers to experience the skills and methods of emergency escape in the event of a fire in the living area, as well as to improve the safety awareness of construction workers to avoid the occurrence of fire.

Sun Valley Expo-axis single-layer grid of nodes in large quantities, the different space angle bars, each bar height difference exists in the node with the wrong side, leading to similar to each node is not the same characteristics. Deepening design of highly manual and error is difficult to check and find errors. In this paper, the building of the Expo Axis Sun Valley relies on a complex spatial structure of the glass curtain wall for connection to single-layer structure and rectangular pipe grid conducted a study of solid modeling. The "nodes together adjacent surface normal vector" principle put forward the rectangular cross-section steel tube in free space positioning methods and reasonable on the surface, and the method through the computer program to achieve three-dimensional solid model of the automatic generation and evaluation capabilities, thereby increasing the efficiency of the design to circumvent the plot error, for the promotion and application of a similar structure to lay the theoretical and design basis. On this basis, to simplify the model and refined model of the comparative analysis, sum up their scope of application. Finally, the curtain wall of glass cutting was geometric analysis and the preparation of auto-cutting process.

For the moment, the most common precast concrete slabs used in projects include SP prestressed concrete hollow slab, double-T plates, and composite slab by steel bar truss and concrete.This paper firstly briefly introduces the recent development of the three kinds of precast concrete slabs.Then the applicability of different precast concrete slabs was summarized in terms of the stress performance, construction measures, calculation methods, and so on.In addition, the selection table of the composite slab by steel bar truss and concrete was proposed in this paper.Lastly, different projects of the three common precast concrete slabs were given.Some conclusions about the applicability of precast concrete slabs obtained in this paper can be evidential references for the design of prefabricated buildings, and assist in solving the problems in selecting precast concrete.