The BIM construction information model primarily includes traditional 3D models and extended nD models designed to meet the diverse needs of various stakeholders. Traditional 3D models provide the engineering quantities of each component based on their geometric and positional data within construction projects. The nD model, a multidimensional information model built upon the 3D model, integrates additional data such as schedule, cost, and safety information. For instance, the 4D model incorporates project schedule information into the 3D model to enable pre-construction simulation and progress monitoring. Meanwhile, the 5D model adds budget and cost data to the 4D model to support cost estimation functions. The BIM construction information model discussed here corresponds to the 5D BIM model, defined as follows:
The BIM construction information model forms the foundation for an implicit quality cost optimization control system, addressing the current low level of visualization during construction. Built on a 3D model, it integrates project schedule and budget cost data, creating an information platform centered on building components and structured around WBS process nodes. This model links engineering components with schedule data, budget figures, quality control checklists, and cost information. It enables real-time querying of construction resource planning versus actual usage, quality monitoring at control checkpoints, and dynamic comparison with the construction organization design.
Developing a BIM construction information model involves two key steps: establishing a 3D visualization Revit model and integrating information through a BIM5D platform.
(1) Establishing a 3D Visualization Revit Model
Using Autodesk’s Revit software suite, a 3D BIM model is constructed. Autodesk’s Revit, a leading 3D modeling tool, allows for the integration of various professional models—including architectural, structural, and MEP (mechanical, electrical, and plumbing)—into a comprehensive and precise 3D BIM model. Additionally, Revit supports efficient collaboration with other software, facilitating multidimensional project management tailored to different stakeholders.
The 3D BIM model contains all attribute data related to the construction project and clearly depicts the spatial relationships between components. This visualization supports design communication, enables accurate quantity takeoffs, and provides reliable data for budgeting.
(2) Information Integration Based on the BIM5D Platform
The 5D information platform builds upon the 3D construction model by integrating schedule and cost data, allowing for detailed queries by component, timeframe, and discipline. It serves as the foundation for real-time tracking of resource usage, generation of quality control checklists, and monitoring of cost information.
The process begins by associating the BIM3D model with various lists to obtain contract and budget cost data. Then, the BIM3D model is linked with the construction organization plan to incorporate schedule information. Importing the construction schedule project file into the Guanglian 5D platform enables dynamic simulation of construction progress, identification of critical construction milestones, generation of quality control checklists, and real-time cost monitoring.
—Excerpt from “Research on Hidden Quality Cost Control in Construction Stage of Construction Projects Based on BIM-PSO” by Yu Jianing
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