BIM Technologies Applied in Construction Phase of China Zun Tower China Zun Tower is a role model • Has the shortest construction period for a Project Overview of BIM application in megasize and skyscraper over 500m, which is only 62 months. complex projects. BIM technology helps • Is located at the heart of CBD in Beijing, leaving China Zun Tower is a super-tall and the skyscraper over 500m to be built super-large project with the total in- little space for construction site. The external vestment of 3.5 billion USD. It is located within 62 months. The construction wall of the building is extremely close to the on the central axis of Beijing’s CBD and speed is 1.4 times of similar projects. property line; covers an area of 1.15 hectares. The construction area totals 437,000 square China Zun Tower is China's first intelligent • Holds the world’s highest steel plate shear wall meters, with 350,000 square meters / construction project, which is fully empowered structure which is over 227m; and the largest 108 floors on the ground, 87,000 square by BIM technology to synchronize design concrete filled multi-cavity steel mega-column meters / 7 floors underground. After management, and to guide construction. with cross-section area over 64m2. completion, the 528m building will BIM technologies are efficiently integrated to be the tallest in Beijing and become a ensure crosssectoral alignment and collaboration, • Has super mass concrete slab with thickness new landmark of the city skyline. The life-cycle simulation and life-cycle application. of 6.5m, area of 1,1478m2 and total concrete construction was started in July 2013 amount of 6,2000m3. It is the first time that and will be completed in October 2018. Project challenges: HRB500 40 mm rebar is used in piled raft foundation. The pit is nearly 40 meters deep. The owner of this project is China Inter- • The world’s first skyscraper that stands on an national Trust and Investment Corpora- area of 8 degree seismic fortification intensity • Has unique styling, complicated structure and tion (CITIC) Heye Investment Co. Ltd., (China standard for earthquake) various systems. Detailing for and coordinating a primary subsidiary of CITIC Group. among different parts are difficult and demanding. Beijing Institute of Architecture Design (BIAD) works as the general designer. BIAD works with TFP Design Firm for conceptual design; KPF helps on this project as architectural advisor; Arup is As General Contractor of China Zun Tower, we focus on technical structural advisor and PB is electrome- innovation. We have applied 20+ new technologies on this project, chanical advisor. The combo of China among which BIM provides us evolutional experience. We deeply State Construction Engineering Corpo- work with designers and subcontractors based on BIM models. ration Ltd. (CSCEC) and China Construc- With BIM's advantage of information integration, we significantly tion Third Engineering Bureau Co., Ltd. (CCTEB) works as the general contractor. increase efficiency and construction quality. And it also improves the team's capability to handle a super complicated project like this. - Xu Lishan Executive Chief Engineer & Construction Director of China Zun Tower China Construction Third Engineering Bureau Co., Ltd Architecture, structure AUTODESK® REVIT® BIM model for Provided by General - Architecture, structure & MEP detailing and MEP models align with design Designer (BIAD) - Decoration & interior design construction documents - Curtain wall design and other - Specialization design - 3D scanning data review ® ® AUTODESK NAVISWORKS MANAGE - Model & information integration - Collision detection Steel structure BIM model - 4D construction simulation - Schedule planning - 3D scanning data review Structure detailing BIM model AUTODESK® BIM 360™ GLUE® Provided by General BIM model for BIM model for Contractor (CSCEC & construction GC management - On-site construction inspection CCTEB) MEP detailing BIM model (MEP contractor) ® AUTODESK DYNAMO STUDIO Curtain wall BIM model - Fine decoration complex parts design (curtain wall subcontractor) & fabrication Decoration & interior detailing BIM model AUTODESK® RECAP PRO (decoration subcontractor) - Generate BIM models for decoration BIM model for design Operation & Other specialized BIM models Maintenance (special subcontractors) The general contractor and subcontrac- BIM application overview • Editable models: based on Autodesk Revit tors apply BIM technology to address platform to aggregate and integrate data of the difficulties The project owner CITIC Heye Investment different formats; advocates and leads lifecycle BIM application, 1. BIM is adopted in design detailing of architec- which has been a mandate for all designers • Browsing models: based on Autodesk Navis- ture, structure and MEP parts to develop and and contractors. BIM data are passed on from works platform to integrate data of different verify original designs. BIM detailing greatly design to construction, operation and mainte- formats; improves efficiency and feasibility. Over 6,200 nance. After thorough studies and discussions by defects have been detected and fixed in time, all parties involved, The Guide to BIM Execution • With consent of the project owner, models of cutting the load of on-site changes and in China Zun Tower was compiled, which set other data format can be provided in original modifications. action guideline and standard for all parties format, together with the Autodesk Navis- during the project life cycle. With progress works models. 2. To satisfy construction quality requirements, of the project, experience is accumulated, the contractors use BIM to simulate complex enabling the Guide to be improved and On top of common BIM applications, the team steel structure connections for optimization. scaled up. has innovated with superprecision detailing de- Mobile devices and 3D scanning are used to sign, simulation of most challenging construction review and guide construction work on site The BIM team for construction phase has tasks, prefabrication of super volume structure, based on the optimized BIM model. over 100 staff from 28 departments covering and 3D laser scanning. 9 supporting functions of general contracting. 3. The contractors introduce BIM for pre-fabri- BIM Management Department is the coordinator Over 90% of model clashes can be cation and off-site digital processing of steel among internal functions, and the interface with bars, curtain wall plates and electromechan- project owner and designers for BIM application. addressed with BIM coordination. ical pipelines. This reduces the demand for Rework and modification drop by construction space, and enables industrialized To facilitate model interoperability and data 65% compared with traditional construction. exchange, BIM Management Department of the practice. General Contractor made the following require- 4. The contractors use Revit to design and ments for the model format to be submitted: manufacture steel bracket and use Navisworks to simulate/optimize the process of concrete • Deliverable Models: Models with original pouring. Finally, it took 93 hours to complete format, link models in Autodesk Revit format, concrete pouring of 5,6000m3, with 20% of and Autodesk Navisworks-bound browsing time saving over traditional pump solution. models; BIM Design Detailing for Coordination and 7,200: By shortening window fan coils, 4,200 m2 BIM Construction Simulation construction guide was saved for other purpose. An additional 3,000 m2 was spared by optimizing layout of the stand- BIM teams are fully engaged in the develop- Detailing design aims at optimizing the functions pipes in the tube-wells beside the giant pillars. In ment of all major construction plans. The plans and quality of the tower. All these measures help total, usable area was enlarged by 7,200 m2. are simulated with Autodesk Navisworks to improve building quality and create additional highlight clashes among space, progress and value over one hundred million RMB. With high-precision design detailing mod- resources. By doing so, the teams can optimize els, general contractors effectively mobilize construction arrangements and processes to The Guide to BIM Execution in China Zun Tower subcontractors and consultants, creating a ensure smooth execution. For the parts with was compiled to specify LOD of detailing design comprehensive coordination pattern that complex nodes that need cross-function- and standards for each technical domain. In the features the leadership of general contractors, al support, the teams would predefine the detailing process, the specialized teams fully inte- participation of all parties, and continuous nodes in a BIM setting and assist in analysis. grated 3D models with 2D drawings, to develop updating. Software automatic calculation was high-quality detailed design files. Up to date, combined with manual review by engineers to Since the construction started, the team simu- the project has generated over 100,000 detailed facilitate coordination. Then clashes that might lated over 10 large-scale plans. The outcome is a design drawings. Precision of the steel structure, impact operation or maintenance were saved bunch of video files covering construction meth- fine decoration, and curtain wall models has with viewpoints in a report for correction. ods, processes, equipment specification including exceeded LOD400. It is estimated that over 90% of model clash- • design of cross-piping and chute in founda- Some numbers up to the end of