BIM Technologies Applied in Construction Phase of Zun Tower

China Zun Tower is a role model • Has the shortest construction period for a Project Overview of BIM application in megasize and over 500m, which is only 62 months. complex projects. BIM technology helps • Is located at the heart of CBD in , 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 2016. es can be addressed after several rounds of tion structure coordination. Rework and modification drop 652: A total of 652 detailing design models were by 65% compared with traditional practice, • large-volume concrete pouring developed in all specialized areas, Among them, which helps save time and cost in construction. decorative models take the largest share. • installation of mega-columns During the construction, BIM managers organize regular on-site inspection to check compliance 800: Over 800 Revit component families dedicat- • basement composite structure construction ed to this project were created by 10 professional with BIM models using Autodesk BIM 360 Glue on iPad. BIM data is used at certain level in con- subcontractors, covering specialized domains of • installation and jacking of special equipment struction tasks such as tour-inspection, technical electromechanics, fine decoration, curtain wall, integration platform elevator and window cleaning equipment. disclosure, QA/QC, etc. In case of inconsistency, the parties would draft a report for revision and execution. Greater consistency between models • construction steps of frame-core steel plate 806: 806 rounds of construction drawing reviews and construction enhances data quality for intelli- shear wall have been done, including steel structure, elec- gent operation and maintenance. It simplifies the tro-mechanics, decoration, curtain wall and lift, difficulty of construction management, reduce • selection and transportation of large mechani- fireprotection and other domains. errors, saves times and improves efficiency. cal and electrical equipment 6200: With BIM tools, the project has run 6-7 • delivery and installation of curtain wall units times more multi-discipline coordination review. On-site inspection with BIM Over 5000 issues were found in design phase and data presented on iPad simplifies • tower crown installation and tower crane over 6200 were found in construction. the difficulty of construction demolition. management, reduce errors, saves times and improves efficiency It represents an innovative approach to select For example: 3D laser scanning from plan options and guides construction. • Prefabricated vertical pipeline technology The BIM teams use high-precision 3D laser scan- The working schedules is imported into Autodesk is employed from Floor 7 to Floor 102. 222 ners to scan each floor after its completion. On Navisworks to develop an animation where actual sets of prefabricated pipelines that designed each floor, there are up to 25 scanning stations, progress and automatically-generated schedule and tagged in Autodesk Revit are installed, which ensures that scanning results are accurate, are shown in different colors for comparison. including air conditioning water system and comprehensive and blind-spot-free. Data granu- It gives an intuitive depiction of work progress fire-fighting system. Work load of on-site larity is enhanced to 2mm. and key roadmap. welding is cut by 30%, plus substantial saving in labor. The project generates massive point cloud data. Prefabrication and digital processing Information and data transmission is a formida- • Decoration Team also prefabricate irregular- ble challenge. It is the first time in China that a China Zun Tower project actively promotes ly-shaped parts for fine decoration in lobby project uses Jetstream data system, which stores prefabrication for energy efficiency and green and premium offices. The team uses Autodesk all the data in a central server. Teams get remote construction. Scale use of prefabricated parts Dynamo for complex parts, and import pa- access to the data by installing Autodesk Revit or saves energy, cost and space. At the same time, rameters to CNC for processing. The finished Autodesk Navisworks with plug-ins on client side. construction quality and speed are greatly im- parts are assembled in the factory space This enables full participation in 3D scanning. proved. It is estimated that construction wastes before being installed on site. This ensures plunge by 90%, while water and electricity sound progress despite limited space on site 3D scanning data keep a reliable record of consumed in construction are only 20% of those and the large number of pipeline and wires to the construction site. The project quality in conventional projects. Construction is well be routed management team compares the ‘real’ point organized despite the little space available on cloud data with ‘virtual’ BIM models and reports site for construction. 3D scanning data is imported in on deviation. It helps to identify key compo- Autodesk Recap Pro to generate nents with quality defects and issues, which is critical to make correction in time and improve as build BIM models for interior project quality. decoration 3D scanning data is imported in Autodesk Recap Pro to generate as-build BIM models for interior deco- About the Company ration design and construction guide. It helps the subcontractors to re-optimize their work under the China State Construction Engineering most updated and real conditions, and ensure the Corporation Ltd. (CSCEC), one of the world’s completion of project models in as-built status. Top 500 enterprises, is the top-ranking Chinese company on the chart of investment It is also an innovative approach to BIM-enabled and construction business. As an important maintenance. Before construction is completed, subsidiary of CSCEC, the Wuhan-based China mechanical and electrical pipelines in the ceiling Construction Third Engineering Bureau Co., and installation in equipment rooms are scanned, Ltd. (CCTEB) is a leading SOE of construction to reserve graphic data and location information for and installation. Super Project Management operation and maintenance. Company affiliated to CCTEB offers a professional platform for general contract- Conclusion ing and management of highend projects. The company was set up to consolidate The construction team of China Zun Tower is com- competitive strength in high-end construc- mitted to building the world’s first super-high sky- tion projects, as well as to promote the scraper with life-cycle BIM management. As a key management mode of general contracting. of construction process, BIM application expands According to mandate by the parent compa- and deepens from design phase to construction ny, it mainly engages in general contracting, phase. More importantly, BIM has been integrated while expanding presence in PPP and EPC.. in design detailing, on-site management and green construction, empowering full participation and trans-disciplinary coordination. China Zun Tower is a role model of BIM application in mega-size and complex projects and will become a benchmark of BIM in the AEC sector.

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