What is BIM?
BIM, or Building Information Modeling, is a process that utilizes a multi-dimensional building information model combined with information sharing based on a 3D model. Its primary goal is to minimize the loss of project information and provide a communication platform for all stakeholders involved in a construction project. This approach enhances overall project management, aiming to reduce costs and improve efficiency.
Bidding Assistance
3D design models assist audit teams in extracting quantity information for key and challenging areas, enabling owners to better understand the quantities, costs, and complexities of components with intricate shapes.
These models offer a three-dimensional overview of the project, detailed designs of critical areas, and explanations of scheme adjustments for each bidding unit. This helps contractors quickly grasp project conditions, accurately assess project difficulty, and provide precise bids. Additionally, it facilitates evaluation of the BIM bidding plans and implementation capabilities of bidding parties.
By exporting to Navisworks software, animations can be created for intuitive presentations, offering clear operational guides and visual demonstrations — what you see is what you get.
Model Deepening Design
First, detailed professional modeling is conducted. After optimization, the layout of pipelines and equipment is refined to create an orderly, functional, and aesthetically pleasing arrangement, maximizing the efficient use of building space while reducing costs and boosting efficiency.
Comprehensive planning before electromechanical installation is essential to ensure quality. Modern buildings, especially intelligent ones with complex functions, have intricate electromechanical systems composed of many subsystems. These systems are connected by pipes and wires that occupy limited interior space. Hence, rationally arranging pipelines, wiring, and equipment within the building is a fundamental task for electromechanical construction planning.
Comprehensive Pipeline Layout Plan
Leveraging the intuitive and visual nature of 3D models as the core tool for integrated design coordination, weekly BIM coordination sessions are held to promptly identify and resolve clashes between disciplines. Feedback is provided, issues are tracked and adjusted continuously, and the BIM coordination platform aids in managing problem-solving processes effectively.
Collision Detection Results
Collision Adjustment Diagram
For multi-disciplinary areas, including equipment and facility concentration zones, vertical clearance is optimized based on mechanical, electrical, structural, and operational requirements. The design space is adjusted to ensure feasibility of maintenance paths, channel smoothness, maintenance angles, and methods through virtual walkthroughs. This process optimizes maintenance channels, proposes the best maintenance methods, and guarantees smooth and convenient access.
BIM Deepening Design Objectives:
- 1. Resolve collisions in electromechanical pipeline systems;
- 2. Achieve a layout that is reasonable, aesthetically pleasing, efficient, and meets the Luban Award standards;
- 3. Use BIM deepening design to reduce costs and improve efficiency;
- 4. Raise pipeline installation elevation and increase corridor clearance;
- 5. Improve deepening design accuracy to 98%.
Application in Construction Site Management
During construction preparation, BIM simulation and optimization are used to assist in detailed design of high-risk and complex site nodes, and to create samples of sub-projects. This identifies problems and key control points to optimize construction plans. Visual disclosures provide direct guidance to management and operators for flawless onsite execution.
Project managers inspect each construction stage by comparing the model with actual onsite conditions via mobile devices. Any issues are photographed and uploaded to a backend system for timely and accurate information sharing.
Given the complexity of mechanical and electrical systems and the demand for detailed pipeline and equipment designs, traditional 2D detailing is combined with 3D BIM technology. This advances three-dimensional modeling of pipelines and equipment rooms across basements, pipeline wells, floors, equipment rooms, and rooftops. A 3D walkthrough vividly renders pipeline and equipment layouts, solving challenges related to pipeline clashes and deepening coordination. Following detailed design discussions, the final BIM model is created and used to generate CAD drawings. Sectional drawings and 3D models provide clear written and onsite instructions to operators.
Case Study: Zhongheng Nanning Pharmaceutical Base – Workshop #1
The core computer room was arranged to ensure timely progress and quality in this critical area.
Construction managers use mobile devices such as smartphones and iPads to provide visual guidance, instructions, and inspections onsite. This eliminates the need to carry numerous paper drawings. Users can directly view model files and detailed component information, comparing them with onsite conditions. For problem areas, photos are taken and uploaded to the backend software with annotations linked to the model, enhancing information sharing and enabling real-time, digital quality management.
The integration of BIM with safety management has elevated project safety to new levels. BIM is used in the planning stages of major projects to simulate construction processes, clearly revealing timelines, progress, methods, and safety hazards. This allows for targeted safety measures to protect against major risks. During daily safety management, BIM models help locate and measure openings and edges onsite, comparing them with the model to prevent omissions and ensure safety protections. Based on construction schedules, protective equipment installation can be timely arranged, ensuring effective safeguarding.
Cost Management
1. Multi-dimensional contract revenue tracking with high data efficiency:
The 5D model links components with the contract list, enabling automatic calculation of budgeted quantities based on actual progress. This supports accurate reporting to the owner and generates progress payments based on approved quantities and budget rates, which are promptly recorded in management software.
2. Multi-dimensional budget cost tracking and detailed analysis:
During cost planning, each 5D model component is associated with time, location, and budget cost data, allowing comprehensive budget tracking and refined cost monitoring.
3. Multi-dimensional actual cost tracking and visual analysis:
The 5D model integrates various business data into a unified platform during construction, providing real-time, accurate cost information to managers. Visualization tools enable dynamic analysis and presentation of cost data.
Quantity Statistics and Material Management
Quantity estimators face challenges transitioning from traditional quantity calculation software to BIM-based methods. Existing BIM software standards for defining building components and attributes vary and often exclude many ancillary elements, resulting in output that may not meet expectations.
Modeling and calculation standards differ internationally, and many software applications struggle to accurately quantify complex-shaped components or efficiently solve special cases. Additionally, large volumes of output data can be difficult to verify against manual reports.
Information asymmetry between quantity estimators and designers reduces efficiency, highlighting the need to break down information silos throughout the entire process.
Accurate pre-construction quantity calculations enable precise material planning, controlling material supply limits. Early control of material quantities helps avoid waste and cost overruns, while ensuring reasonable allocation of company and project funds.
Bill of Materials (BOM)
Delivery of Completed Model
After collision detection is completed and approved by the design team, modifications are signed off by the client. Each discipline updates their models according to the approval plan. Once finalized, these models are handed over to the general contractor, who integrates the various professional models into a unified electromechanical model. Special attention is given to the systematic classification, parameterization, and informatization of mechanical equipment, pipelines, cable trays, and other components from the modeling stage to meet completed model requirements.
BIM organically integrates spatial building information with equipment parameters, offering owners comprehensive access to global building data. By linking BIM with construction process records, it can also include concealed engineering details. This facilitates property management and provides valuable historical information for future renovation, remodeling, or expansion projects for owners and project teams.
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