01. Project overview
Located in the Mawan area of Qianhai, Shenzhen, Guangdong Province, the Free Trade Times Center project is the first super high-rise commercial complex project in the Greater Bay Area with the design concept of "miniature city". The project covers an area of about 35,000 square meters, with a construction area of about 500,000 square meters, 4 underground floors, 3 towers above ground, the highest 56 floors, about 250 meters, including super Grade A office buildings, super five-star hotels, shopping malls, etc., and will become a new landmark in the Mawan area after completion. The project quality has created the Luban Award, the safety has created a national standardized learning and exchange project, the BIM has been handed over to meet the high-precision completion model of operation and maintenance requirements, and the national smart construction demonstration project has been created.
02. Intelligent construction system
In order to give full play to the general contracting management function and achieve the general contracting management goal, the project is determined to create a technology + management, two-wheel drive management model, and empower the general contracting management of the project with intelligent construction.
The intelligent construction of the project adopts the application mode of "1 concept, 2 goals, 4 requirements, and 9 scenarios".
The project builds a digital center, through 9 scenarios and 44 applications, and promotes the realization of progress, quality and safety goals through the management of the five production factors of "material machine law ring", so as to realize high-quality construction empowered by informatization, digitalization and intelligence.
▲ List of 44 smart applications
▲ The digital center of the Free Trade Times Center project
▲ The main hall of the digital center of the Free Trade Times Center project
▲ The large screen of the digital command center of the Free Trade Times Center project
03. Highlight display
Scenario 1: Personnel management
In view of the problem of more than 2,000 laborers and high mobility during the peak period of the project, the BI large-screen platform integrates the local platform, cloud construction labor service, and project SPM labor service platform to manage the labor service of workers, and fully popularize the electronic labor contract, which greatly reduces the workload of labor management compared with paper materials and facilitates real-time access. Through the platform, statistical analysis of the subcontracted wage payment rate, wage payment proportion and per capita wage is carried out, and when the data is abnormal, it automatically warns and corrects deviations in time, which realizes the dynamic management of migrant workers' wages and reduces labor risks and wage payment risks.
▲ Labor management BI screen
Scenario 2: Material management
The project adopts an intelligent weighing image system to weigh the entry and exit of main materials such as steel bars and concrete, and the material entry data is true and traceable, and timely treatment measures are taken when problems are found, so as to strengthen the project department's control over bulk materials and reduce unnecessary cost waste.
▲ Weighing image equipment
Scenario 3: Machinery and equipment management
As an important guarantee for on-site safety and production, large-scale machinery and equipment (tower cranes, elevators, climbing formwork) are assisted by digital monitoring means to assist management personnel to realize the intrinsic safety and monitoring and early warning of equipment, and improve the safety and reliability of mechanical equipment.
In view of the group tower operation of 6 boom towers and 4 flat boom towers of the project, the tower crane monitoring system is applied to realize the automatic anti-collision and automatic stop functions of various tower cranes, and at the same time, an AI identification system is installed in the cab and hook to automatically identify the personnel dynamics and the driver's illegal operation within the range of the early warning hook, so as to ensure the safety of hoisting operations, and realize the digital intelligence of tower crane inspection and tower crane operation safety.
▲ Group tower anti-collision BI large screen
▲ Cab visualization and AI recognition
▲ Hook visualization and AI recognition
For this reason, two types of wire rope broken strand monitoring equipment are introduced, of which the movable type is used for the acceptance of the wire rope, and the fixed type is used for real-time monitoring of the wear of the wire rope on the tower crane, and the timely warning and replacement of the data exceeds the threshold to avoid the occurrence of wire rope broken stock accidents.
▲ Wire rope broken strand monitoring system
On the basis of the application of tower crane and construction elevator inspection, the innovative use of climbing formwork inspection in place, inspection and maintenance of important parts such as oil cylinders and anti-falling bolts to ensure the safe operation of large-scale equipment.
▲ Application of climbing formwork inspection in place
Scenario 4: Technical management
Consistent drawings and models, lightweight collaboration: The BIM model is used for collision checking, combined with the collaborative platform for lightweight processing, so that all aspects of design and construction work based on the same data source, gather participants to achieve real-time collaboration, and reduce drawing errors, information transmission delays and communication costs.
AR+BIM technology: 1:1 comparison between the BIM model and the on-site entity is used for the disclosure before the construction of the mechanical and electrical installation of the basement and the tower, the inspection during the construction, and the acceptance after the construction to ensure that the BIM model is 100% implemented.
▲ AR+BIM technology
3D printing assisted disclosure: The project applies 3D printing technology to complex construction nodes, such as ribbed floor slabs, conversion trusses, T1-T2 air corridors, etc., combined with construction simulation for visual disclosure, to help front-line construction management personnel master the construction process and complex nodes.
▲ 3D printing disclosure
Deepening of super high-rise all-professional machinery: Use Revit to deepen the design and construction simulation of climbing formwork + tower crane + aluminum mold + steel structure + civil engineering + electromechanical pipeline and reserved opening, review and disclose the embedded installation, hole reservation and mechanical collision, and strengthen the management personnel to control the on-site construction.
Steel structure welding robot: For the steel components of 80,000 tons and more than 65% of the steel components of 40mm and above thick plates, the project introduces two kinds of welding robots, rail type and wall climbing type, which effectively improves the welding quality and reduces the technical requirements for welding workers. After exploration, it is concluded that the welding efficiency of the plate thickness of more than 60mm and the weld filling amount of more than 80kg is a positive percentage, and the welding efficiency can be increased by 40~50% when the weld filling volume reaches more than 150kg.
▲ Orbital and wall-climbing welding robot operation
▲ Comparison curve of welding ergonomics
Scenario 5: Environmental management
Intelligent hydropower monitoring is applied to workers' living areas, combined with the "carbon data monitoring and management platform" independently developed by China Construction First Bureau, to monitor the energy consumption of the project in real time, take energy-saving and emission reduction measures in a timely manner, and reduce the waste of water and electricity.
▲ Carbon data monitoring and management platform
The project applies the photovoltaic storage, direct and flexible smart microgrid, and uses the "peak and valley" electricity price difference to save electricity bills through energy storage cabinets, and at the same time can reduce the occupation of public power supply resources and improve the green and low-carbon results in the project construction process.
▲ Optical storage direct flexible equipment
▲ Operation data of the storage cabinet
Scenario 6: Progress management
Jointly developed the AECmate progress management system with China Construction Technology Center, through the decomposition of the contract package of the participating units, sort out all the relevant parties that affect the progress of the project, identify the contract master control node and contract interface, subdivide the contract master control node into milestones, level 1 and 2 nodes, and then lock them step by step, emphasizing the node assessment; Weekly implementation plan, combined with the general contracting coordination regular meeting system, clarifies the construction period plan and work tasks of each participant of the project, fully establishes a communication and coordination mechanism with the participants, and strengthens the general contracting management of the project. At the same time, it leads to the management of two key elements - ergonomic management and public resource management.
Based on the division of the construction section, the engineering quantity of each process is pre-filled, and the construction time and labor input of each process are counted through the construction daily report, so as to form the ergonomic analysis data of the construction team, so as to effectively identify the unreasonable resource input and the idle working face, and correct and adjust it in time.
▲ Ergonomic management scenario
The site, road and vertical transportation resources are the lifeline of the construction organization, and the project analyzes and plans the business formats at different stages to form the "large plane" and "small plane" layout drawings and vertical transportation demand tables of the site at different stages, and introduces the platform for reasonable arrangement and utilization of public resources.
▲ Public resource management scenario
Scenario 7: Quality management
The project is based on the quality management model of 5.5 high-quality engineering production line, and integrates digital technology, equipment and quality management to achieve one-time survival, one-time excellence, timely correction, continuous improvement, and promote the realization of project quality objectives.
The combination of virtual model and physical model is used to display the construction process and the key points of quality control in the process more intuitively, and improve the disclosure effect of the model system before, during and after construction.
▲ Quality virtual and real model disclosure card
The use of intelligent measured equipment, such as intelligent ruler and intelligent rebound meter, can improve the efficiency of measured measurement, and at the same time, the data can be transmitted and saved to the smart construction site platform, which is convenient for statistical analysis and timely correction, reduces the investment of management costs, and realizes the traceability and non-tampering of measured data.
▲ Intelligent measurement system
Based on the data of on-site inspection and acceptance, the quality management platform conducts statistical analysis, airs the quality problems of the App at the regular quality meeting held every week, and ranks the subcontracting quality from the three dimensions of performance cooperation, problem rectification rate, and one-time acceptance pass rate to assist quality management.
▲ Multi-dimensional quality assessment and evaluation
In view of the problems of many preconditions for excellence and difficult process management of the Luban Award, we have developed a visualization system for the whole process of quality excellence, monitored the whole process from the preconditions, time nodes, process data and other aspects of excellence, and uploaded inspection records and image data at the same time to realize the traceability of problems and ensure the realization of the goal of excellence.
▲ Visualization system for the whole process of quality excellence
Scenario 8: Security management
In view of the complex process of the project, the large number of operators, the high safety standards, and the aging of workers in the industry, the project adopts the "13579" innovative safety management model, combined with digital technology, and starts from the health and character management environment to create a healthy and safe construction site.
Set up a health station, use health all-in-one equipment to carry out quarterly basic inspections for operators, carry out monthly inspections for those over 55 years old and special operations, and immediately require relevant units to remove personnel or provide the latest hospital physical examination report when health problems are found, so as to reduce the health risk of labor management. The smart helmet independently developed by China Construction First Bureau has the functions of independent positioning, safety early warning, trajectory query, etc., which solves the problems of difficult communication and positioning of other smart helmets at the construction site.
▲ Health Station
▲ The smart helmet independently developed by China Construction First Bureau
Through Eagle Eye monitoring, AI recognition, combined with on-site grid partition management, real-time monitoring of safety standard wearing and illegal operations is carried out, and the unsafe behaviors of workers are stopped by using construction site radio shouting, and violations are reported at the morning shift meeting and regular safety meeting to improve the on-site safety management effect.
▲ AI security recognition
▲ BI large screen hawkeye monitoring
Other safety monitoring equipment such as high formwork monitoring and distribution box monitoring are applied, among which stress and strain monitoring is carried out on formwork support such as 4m high girder, 150m high inclined wall, and 214t large steel beam bottom support tire frame, so as to improve the control effect of dangerous projects.
Scenario 9: Integrated management
The digital center is integrated with "1 main hall + 6 annex halls". The main hall is equipped with a large BI screen of the command center, and the annex hall is divided into six sections: intrinsically safe construction, scientific construction, high-quality construction, BIM technology, green and low-carbon construction, and scientific and technological construction with the concept of "lean construction".
04. Application benefits
Intelligent construction promotes high-quality performance
In terms of science and technology management, the company has established provincial and ministerial-level green demonstration projects and new technology application demonstration projects, established 2 scientific research projects, won the special prize of the 3rd "New Infrastructure Cup" China Intelligent Construction and BIM Application Competition, accepted 4 invention patents, accepted 10 utility model patents, authorized 6 utility model patents, obtained 1 municipal construction method, 2 bureau-level construction methods, and published 3 papers.
In terms of quality management, in the first half of 2023, Shenzhen Structural Entity Inspection ranked fifth among more than 100 projects, and won 2 national QC achievement awards.
In terms of safety management, in the April 2023 Shenzhen Construction Project Safety Production and Civilized Construction Excellent Site Evaluation, the Free Trade Times Center project won the Municipal Excellence Award with the second overall score among 158 projects.
At the end of last year, in more than 100 project evaluations, the project won the annual winning project and excellent team of Qianhai Authority, and the performance work was also highly recognized by the owner, and received 3 letters of commendation.
Intelligent construction sets a brand benchmark
In 2023, the project has welcomed more than 60 large-scale activities such as internal and external observation and exchanges, with a total of more than 20,000 people, and more than 200 publicity and reports on internal and external media platforms such as CCTV, Round Point Live, and Shenzhen Special Zone Daily.
On May 26, 2023, the "Walk into a Bureau" open day event, with the theme of "A Bureau Pioneer, 'Wisdom' is a Must", ushered in the observation group of municipal housing safety production and intelligent construction in 31 provinces and municipalities across the country
On June 4~5, 2023, the on-site observation and exchange activities of the "Safety Production Month" in the field of construction in Shenzhen in 2023 will be undertaken
On September 11, 2023, it will host the 2023 "Quality Month" demonstration project observation activity in the field of construction in Nanshan District
On September 19, 2023, it will host the 2023 Shenzhen Construction Field "Quality Month" Demonstration Project Observation Activity
On September 17, 2023, it hosted a special meeting on the demonstration and application of the construction industry Internet laboratory of the National Digital Construction Technology Innovation Center
05. Summary of project experience and planning prospects
In the intelligent construction planning stage, the project of China Construction First Bureau Free Trade Times Center is based on the purpose of "practical and practical", and the application of intelligent construction is an extension of management means. Facts have also proved that the application of intelligent construction has brought positive changes to the management habits, methods and process mechanisms of the project team, and has greatly promoted the quality, safety, technology, progress, and green environmental protection.
The project will continue to deeply apply intelligent construction technology, continue to explore the organic combination of intelligent construction and project general contracting management, and also hope to provide reference for other similar projects by sharing the experience of the Free Trade Times Center project in the process of intelligent construction exploration and practice, and jointly promote the digital transformation of the construction industry and achieve high-quality development.
Source: Construction Enterprise Management Magazine