The Kangju Garden project is located on the south side of Cuizhu Road and the west side of Shengchun Road in Fuyang City, Anhui Province. It covers a planned land area of approximately 16.57 hectares (about 248.58 acres) with a total construction area of around 332,179.95 square meters. This includes a ground capacity of roughly 265,072.21 square meters and a residential area of about 225,606.57 square meters. The project features a plot ratio of 1.60 and a building coverage rate of approximately 56%. It consists of 61 steel-structured prefabricated residential buildings. The prefabricated components used include PK panels, precast concrete external wall panels (with embedded window frames and integrated air conditioning panels), precast concrete parapets, precast concrete stairs, and balcony corridor hanging panels that incorporate integrated solar panels.
Application of BIM Technology
Conceptual Design Phase
During this stage, BIM technology is applied primarily in two areas: spatial planning and site analysis.
1. Spatial Planning: This involves architectural design, surrounding landscape considerations, and traffic flow. The architectural design must balance aesthetics, functionality, cost-effectiveness, and local cultural traditions. For this project, the complex structures and building facades are difficult to represent accurately with basic design software, making it challenging for construction teams to intuitively understand the design.
2. Site Analysis: BIM technology analyzes terrain, vegetation, climate, and other environmental factors relevant to the prefabricated building project and its surroundings. This enables the creation of a comprehensive and intuitive model to inform subsequent design decisions, such as spatial orientation and construction planning.
Design Optimization
Compared to traditional building software, BIM technology integrates all project information throughout the project lifecycle. It optimizes design through visualization and pipeline integration, reduces errors, enhances overall project control for designers, facilitates interdisciplinary collaboration, and improves drawing quality tracking.
Detailed Design
The detailed design phase is unique to prefabricated buildings and serves as a critical link between design and construction. During this stage, the building is broken down into various components. These components are designed considering factory production and onsite assembly requirements. Pre-embedded elements such as steel bars, wiring boxes, and equipment are incorporated.
Given the high assembly rate of this project, it is essential to carefully manage cost, production, and installation factors during this phase. BIM technology helps visualize and parameterize component dimensions, disassembly processes, reinforcement, and collision detection to support project completion.
1. Component Segmentation: Components such as PK boards, precast concrete external wall panels, parapets, stairs, and balcony corridor hanging panels are standardized based on accumulated enterprise projects. A company-specific family library has been developed to streamline component design. When component dimensions change, corresponding family library components can be modified and managed directly, enabling pre-assembly previews and clash checks.
2. Component Detailing: This includes size optimization, steel reinforcement layout, and placement of embedded parts. Drawings follow construction documentation standards. BIM technology enhances efficiency and reduces errors during this stage.
3. Clash Detection: BIM models are used to detect collisions in two main ways:
① Between components, such as verifying connections between vertical steel bars and sleeves, checking collisions among horizontal steel bars, ensuring pipeline holes for inter-component connections align on the same axis, and confirming reliable overlap of fireproof and waterproof facade structures;
② Within components, such as detecting collisions between embedded wiring boxes, steel bars, and other embedded parts.
4. Component Drawings: Due to the large volume and variety of components, BIM technology enables one-click generation of drawings for similar components, reducing repetitive work and automating the drawing process.
Source: Anhui Architecture
Article by Liu Lichao (Anhui Jinggong Green Building Group Co., Ltd.)
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