When establishing a suitable BIM model, several key factors must be considered:
1. Demand-Driven Modeling: Tailor the accuracy and attributes of BIM models to suit different applications. It is essential to balance the varying requirements across BIM uses, maximizing model reuse to reduce workload and expedite the modeling process.
2. Comprehensive Information: BIM models serve as information carriers. Although some software, such as geotechnical finite element analysis tools, may not support importing complete BIM models, it is advisable to include essential attribute parameters necessary for specific applications. For instance, in finite element simulations, attributes like Young’s modulus and Poisson’s ratio of soil layers should be incorporated to facilitate easy access and utilization.
3. Efficient Segmentation and Detailing: Modeling represents a significant portion of the workload in BIM applications. To maintain efficiency, planning should be done in advance by grouping applications with similar modeling standards. Proper component division is crucial for easy extraction or addition of model elements. Additionally, shield tunneling construction involves extensive work; thus, for economic reasons, applications like finite element simulations often focus only on key areas. Consequently, the model should allow quick segmentation to enable extraction of relevant sub-models.
4. Appropriate Granularity: Finer BIM model divisions allow for more precise information extraction and model representation. However, increased detail leads to more components and a heavier information load, which can overwhelm BIM maintenance personnel over time. For shield tunneling construction, relevant component families must be built efficiently. Prioritizing speed, the model should meet application requirements and include complete information while selectively simplifying certain appearance details to accelerate the modeling process.
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