Analysis of Key Influencing Factors and Discussion of Implementation Points for the Hoisting Scheme of Super-Large GRC Shaped Elements

In the field of architectural decoration, the hoisting of super-large GRC sculptural elements is like a precise "aerial ballet." Its successful execution not only tests material performance and engineering technology, but also requires professional control across the entire chain. As an industry player with 28 years of experience in detailed design, manufacturing, and construction of UHPC/GRC/GRG/GRP materials, Qinglong Group fully understands the decisive role that the hoisting process plays in a project's success. This article analyzes how to achieve safe and efficient hoisting of super-large GRC components from two aspects: key influencing factors and implementation points.

I. Analysis of the Core Influencing Factors in Super-Large GRC Sculptural Hoisting

1. The Underlying Logic of Material Properties and Component Design GRC material is based on glass fiber reinforced cement, combining lightweight and high-strength properties (flexural strength can exceed 20MPa). However, the hoisting of super-large components (each weighing over 500kg) still requires focused consideration of dead weight distribution and structural stability. During the design stage, BIM technology should be used to simulate the stress state of components, combined with Rhino parametric modeling to optimize hoisting points and avoid cracking caused by stress concentration. For example, in the Dongguan Women and Children's Activity Center project, the Qinglong team successfully reduced hoisting load difficulty by breaking hyperbolic GRC components down into modular units, and the project won the Silver Award of the AALBORG WHITE Cup GRC Construction Engineering Innovation Award.

2. Dynamic Adaptation of Site Environment and Equipment Selection Hoisting operations are significantly constrained by site space, climate conditions, and surrounding buildings. In a commercial complex project in Nanning, for the hoisting of special-shaped GRC sunshades at a height of 30 meters, Qinglong used a 250-ton truck crane combined with a hydraulic synchronous lifting system, controlling installation errors within ±3mm through 3D laser scanning positioning technology. Meanwhile, appropriate lifting devices must be selected according to component dimensions (such as cornices longer than 10 meters); a custom four-point balanced lifting device is recommended to ensure levelness and stability during hoisting.

3. Systematic Assurance of Construction Process and Safety Control Super-large GRC hoisting requires a full-process quality traceability system covering "design-production-transport-installation." In production, embedded RFID chips give each component a unique identity; during transport, dedicated supports are used to prevent deformation. Before installation, pull-out tests must be performed on anchoring points (tensile capacity ≥15kN), and wind speed monitors must be equipped (operations stop when wind force reaches level 6 or above). In the Century Plaza translucent concrete project on Nanjing East Road, Qinglong innovatively adopted a "ground pre-assembly + precise aerial docking" process, compressing the traditional 3-day hoisting cycle to 48 hours while achieving zero safety accidents.

II. Implementation Points and Technical Innovations in Super-Large GRC Sculptural Hoisting

1. Forward-Looking Planning in the Detailed Design Stage Based on the project's architectural form, hoisting path simulation and spatial conflict detection should be carried out in advance. For complex shapes such as hyperbolic surfaces and hollow-out patterns, "digital twin" technology can be used to build a 1:1 virtual hoisting scenario to optimize lifting point settings and machinery positioning. Through its self-developed GRC component hoisting simulation software, Qinglong's R&D center has achieved visual verification of hoisting plans, reducing the design change rate by more than 30%.

2. Coordination of Modular Production and Standardized Installation Super-large components are broken down into standard modules weighing ≤800kg, with pre-assembly and surface treatment completed in the factory to reduce on-site workload. In the installation stage, the "three-line control method" (axis line, elevation line, contour line) is implemented, combined with real-time calibration by total station, to ensure component joint gaps ≤2mm. Qinglong's Guangxi production base has an annual capacity of 600,000 square meters, with automated production lines ensuring module precision. Its UHPC/GRC products have been applied in overseas projects in Malaysia, Saudi Arabia, and other countries.

3. Full-Cycle Service and Technical Support System As a National High-Tech Enterprise, Qinglong provides "one-stop" service from detailed design to after-sales maintenance. For post-hoisting structural stability, a regular inspection mechanism has been established (once per quarter in the first year, then once every six months), with non-destructive testing technology used to assess the anchoring condition of components. The Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), which Qinglong participated in formulating, provides an important technical basis for industry hoisting specifications.

Super-large GRC sculptural hoisting is a comprehensive practice of materials science, engineering mechanics, and project management. The key to success lies in deeply integrating technical rigor with innovative thinking. Based on 28 years of industry experience, Qinglong Group continues to provide safe and reliable GRC solutions for landmark buildings, commercial complexes, and other projects through technological R&D and full-chain service capabilities, embodying its corporate mission of "Creating Beautiful Architecture." In the future, as the application scenarios of UHPC/GRC materials continue to expand, professional hoisting technology will become the core engine driving high-quality development of the architectural decoration industry.