BIM technology is primarily used for modeling. Without a solid modeling foundation, its other functions cannot be fully implemented. BIM effectively saves energy, reduces costs, lowers pollution, and enhances efficiency throughout the design, construction, and operational phases of an entire engineering project. Let’s explore the various applications of BIM technology.
1. Demonstrating Solutions for Special and Complex Structures
When technicians find it challenging or unnecessary to create highly precise models, it’s still valuable for the project team to thoroughly understand the construction sequence, plan, and techniques. By quickly and cost-effectively building relatively low-precision models, they can demonstrate construction steps for unique structures. This fragmented application of BIM is often referred to as the BIM “model show.”
For example, during the construction of the Xin’an Bridge over Dongbao River in Shenzhen, BIM was used to simulate the application of a new construction hanging basket for a corrugated steel web PC composite box girder bridge. BIM helped design a reasonable and practical hanging basket to address the lifting challenges of the corrugated steel web.
2. Clash Detection
In scenarios such as hoisting steel box girders for narrow interchange ramp bridges or dismantling large gantry cranes, site constraints and the risk of line conflicts are significant. To ensure safety, BIM models of components and hoisting equipment are created to plan stacking locations and lifting paths on site. This enables pre-construction rehearsals and helps identify potential safety hazards, like line conflicts, that are difficult for humans to detect.
3. Measurement and Layout of Complex Structures
Irregular curved-edge structures, common in road and bridge projects, require precise measurements. Using Revit, high-precision models capture coordinates of key control points according to construction needs. This process verifies manual calculations and provides a secondary data source to reduce errors. For instance, the aviation port BIM workstation at Zhengzhou Engineering Co., Ltd. used Revit to model complex decorative arches. By agreeing on control points with manufacturers and capturing their coordinates in the BIM model, they ensured accurate fabrication and installation, as was successfully demonstrated in the Yellow River dual-purpose bridge project.
4. Designing Templates for Complex Structures
Designing formwork for unique structures is often challenging, such as vase-shaped bridge piers, streamlined cast-in-place beams, or irregular cable-stayed bridge towers. BIM allows direct modeling of these shapes, extracting irregular surfaces after segmentation. This data guides manufacturers in cutting materials accurately. For example, the third Yangtze River Bridge project in Nanjing used AutoCAD 3D modeling to design complex internal molds for cast-in-place beam ends, simplifying the process and achieving excellent results.
5. Technical Disclosure of Complex Structures and Rebar
The BIM Research Institute of Zhengzhou Engineering Co., Ltd. developed a simple grid column installation bracket for the Shanghai Metro BIM workstation, which received a utility model patent. To help onsite operators quickly master its use, a 3D BIM model was created for visual technical disclosure, enabling instant understanding. Additionally, BIM was used in designing a multifunctional lamp post integrated with subway station fences, incorporating cameras, spotlights, warning lights, advertising, and dust suppression nozzles, earning praise from project owners. BIM technology is ideal for such disclosures and auxiliary designs.
6. Site Layout Planning
Highway, railway, and municipal engineering projects often require careful planning of construction sites, especially in dense urban areas like subway projects where space is limited. Efficient site layouts are crucial to smooth construction and have become a competitive advantage in owner tenders. BIM technology supports site layout planning for prefabricated beam yards, mixing stations, and more. Leading BIM solution providers such as Guanglian Da and Luban offer powerful site layout software that is easy to learn, allowing modelers to create detailed and aesthetically pleasing site plans quickly. These tools come with extensive libraries of common site elements such as garages, temporary housing, flagpoles, fencing, and steel sheds, enabling rapid modeling and comparison of different layouts.
7. Construction Progress and Plan Visualization
During road and bridge projects, monthly progress reviews are common. Using BIM models to demonstrate current progress and upcoming plans enhances meeting efficiency and helps identify issues early. This is especially important for large subway stations. By segmenting structures and using colors and transparency to differentiate completed, ongoing, and planned work, BIM improves team collaboration and communication.
8. Quantity Takeoff
Complex structures are difficult to quantify mentally, causing headaches for engineers. BIM models can directly extract quantities, simplifying this task. Quantity takeoff can also be applied to less complex structures alongside other BIM functions. Skilled BIM modelers can efficiently calculate quantities for bridge piers, culvert walls, slope protection, and formwork weight estimation, among others.
In summary, these examples showcase the diverse applications and practical value of BIM technology. We hope this overview proves helpful to everyone interested in BIM.
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