There are various types of foundation pit supports, with eight commonly used methods: slope excavation, deep mixing pile retaining walls, high-pressure rotary jet piles, channel steel sheet piles, drilled piles, underground continuous walls, soil nail walls, and SWM (steel reinforced concrete mixing pile wall) construction techniques. These support forms and their components require systematic design, compatibility, and scalability. Therefore, these components must be expandable according to specifications after storage to accommodate different project needs.
The naming process for foundation pit support components depends on the specific components used in each engineering project. To facilitate computer retrieval and ensure high scalability, components are assigned unique identification numbers during entry, which simplifies future management and improves modeling efficiency. Hence, a unified coding standard is proposed. Implementing a consistent naming system is essential for BIM standardization, which requires detailed coding rules. The coding principles are as follows:
(1) Uniqueness: Each component must have a unique code that is not duplicated. Every support form and component is assigned an independent, exclusive code;
(2) Standardization: Coding follows a consistent pattern with a unified format and fixed digit length;
(3) Simplicity: Codes should be straightforward and clear, avoiding unnecessary digits;
(4) Feasibility: Codes must reflect actual usage and be easy to interpret.
To meet these principles, this section proposes a six-level coding system inspired by existing decoration engineering naming conventions and adapted to current project construction and BIM technology requirements. This system uses a combination of numbers and letters to encode a large volume of component information. The components are categorized into six hierarchical fields, representing project code, building type, discipline type, sub-project, sub-sub-project, and descriptive information. Hyphens (“-”) separate each field, detailed as follows:
Level 1: Project code, represented by numbers or uppercase letters.
Level 2: Building type, where “01” represents building construction projects and “02” stands for general installation projects, etc.
Level 3: Discipline type. For example, under building construction projects (“01”), “01” refers to masonry engineering, “02” to foundation treatment and slope support engineering, “03” to pile foundation engineering, etc.
Level 4: Sub-project. For foundation treatment and slope support engineering (“0102”), “01” denotes foundation treatment engineering and “02” represents foundation pit and slope support engineering, etc.
Level 5: Sub-sub-project, represented by letters.
Level 6: Descriptive information, used to further specify component details or clarify the preceding fields.
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