The Qingpu Dongdu Yuelai City project spans plots 54-01 and 55-02, covering a total area of 68,027.20 square meters. The total construction area is approximately 370,000 square meters, with about 247,000 square meters above ground and 122,000 square meters underground. Additionally, the underground commercial space and connecting passage between plots 54-01 and 55-02, as well as the Dianshanhu Avenue station of Metro Line 17, encompass a construction area of 12,000 square meters.
Practical Applications of BIM in Project Cost Control
By leveraging BIM technology to address challenges in project cost management, effective cost control for engineering projects can be realized.
1. Optimizing Net Height Specifications with BIM Technology
The client has specific net height requirements for various functional spaces. However, during construction, issues such as insufficient net height were frequently encountered in areas like car ramps, truck ramps, basement car passages, and truck passages.
BIM Optimization Approach: The BIM model allowed for localized adjustments, such as flipping up beams where slope net height was affected, maintaining consistency in plan, elevation, and section views. After optimization, the slope net height increased to 4.00 meters, meeting truck traffic requirements. Similarly, BIM modeling identified insufficient clear height in truck passages. By relocating the fire protection bridge next to the strong current bridge and rerouting pipes below it, space was reserved for installation and maintenance. Three weak current bridges were arranged above the parking area. Post-optimization, the truck passage clear height reached 3.80 meters, satisfying truck traffic standards.
2. Enhancing Underground Parking Space Design Using BIM
The project’s second underground floor is designated for mechanical parking, requiring a minimum clear height of 3.60 meters. Initially, the mechanical parking spaces were positioned directly beneath structural beams, providing only 3.50 meters of clear height, which is insufficient.
BIM Optimization Approach: BIM models were used to analyze and revise the mechanical parking layout. The original 19 mechanical spaces were reconfigured into two groups of three and one group of five spaces, reducing the total by eight. To compensate, additional parking spaces were planned in other areas to meet client requirements.
3. Refining Reserved Openings and Pipeline Layouts
Conflicts arose between fire pipes, sprinkler pipes, and civil air defense doors, with structural reserved holes positioned above the doors, causing collisions.
BIM Optimization Approach: Using BIM, clashes between equipment pipelines and reserved openings were analyzed. Some pipelines were flipped up or rerouted to avoid reserved openings, while some openings were reinforced to accommodate adjustments. For example, after optimization, water pipes were relocated above civil air defense doors, passing through structural beam reserved holes, thus eliminating collisions.
4. Optimizing Main Pedestrian Paths and MEP Pipeline Layouts
The project owner imposed strict net height requirements for the commercial area, specifying a floor height of 6.00 meters for the first-floor commercial podium and a clear height of 4.50 meters for commercial corridors. While most corridors met this standard after optimization, some areas remained below requirement, with net heights of only 4.40 meters.
BIM Optimization Approach: The BIM platform enabled coordination between civil engineering and mechanical, electrical, and plumbing (MEP) disciplines in a shared 3D space. Equipment pipelines were rearranged, such as relocating HVAC smoke exhaust pipes to logistics corridors, which then supplied adjacent shops. This avoided congested pipeline zones and increased the local net height to 4.60 meters, surpassing the owner’s requirements.
5. Refining Commercial Corridor Ceiling Design with BIM
During site entry, the decoration design team developed ceiling plans based on the owner’s specifications. However, due to the prior two-dimensional design process and the subsequent mechanical and electrical installations, the final net height was unclear. The ceiling net height requirement was 4.15 meters, but BIM analysis revealed local heights of only 4.10 meters.
BIM Optimization Approach: After thorough BIM-based pipeline optimization, the decoration team adjusted the local ceiling height to 4.00 meters. They also redesigned the ceiling shape to a hollow form, minimizing visual impact despite the reduced height. The final design met the requirements of the decoration team.
Summary: The use of BIM technology at Dongdu Yuelai City, along with BIM management throughout project stages, resulted in cost savings exceeding 11 million yuan and reduced the project timeline by 1,770 working days compared to traditional cost control methods.
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