Research on Splicing Precision Control Technology and Practice for Multi-Curved UHPC Forms

[Research on Splicing Precision Control Technology and Practice for Multi-Curved UHPC Shapes: Innovative Breakthroughs from Qinglong's 28 Years of Industry Experience]

In the collision of contemporary architectural aesthetics and engineering technology, multi-curved UHPC shapes, with their unique spatial expressiveness, have become the finishing touch of high-end projects such as landmark buildings and cultural venues. However, controlling the splicing precision of their non-linear forms has always been a recognized technical challenge in the industry. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group, leveraging its full-chain technical strength, has achieved breakthroughs in this area—from millimeter-level error control to the flawless realization of complex shapes—providing systematic solutions for the integration of architectural art and engineering practice.

I. Precision Challenges of Multi-Curved UHPC Shapes: Full-Cycle Difficulties from Design to Construction

Precision control in the splicing of multi-curved UHPC components involves multiple stages, including detailed design, mold machining, manufacturing, and on-site installation; a deviation in any single stage can distort the overall shape. During the detailed design stage, synchronizing parametric models with actual construction as a “digital twin” is highly difficult; in mold machining, subtle errors in surface curvature can be amplified; during installation, external factors such as structural settlement and thermal deformation further test precision stability. Through 28 years of project experience, Qinglong has found that traditional “empirical” construction methods can no longer meet modern architecture's stringent requirements for 0.5mm-level splicing seams, and a full-process digital precision control system must be established.

II. Digital Technology Empowerment: Qinglong's “Four-Dimensional Solution” for Precision Control

Relying on the technical reserves of a national-level R&D center and a provincial engineering technology center, Qinglong has innovatively built a four-dimensional precision control system of “design-production-installation-monitoring.” On the design side, BIM+Rhino parametric modeling is adopted to break architectural curved surfaces down into quantifiable unit modules, with Grasshopper algorithms optimizing splicing joints; in the production stage, industrial-grade five-axis machining centers are introduced for mold making, ensuring surface profile errors of ≤0.3mm; during installation, 3D laser scanning provides real-time positioning, combined with the independently developed “adjustable support system” to achieve millimeter-level fine adjustment. In the Nanjing East Road Century Plaza translucent concrete project, Qinglong used this technology to achieve seamless splicing of 36 double-curved UHPC components with seam flatness of 0.2mm, winning the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

III. Material and Process Innovation: UHPC Performance Optimization and Splicing Process Breakthroughs

As a participant in the formulation of UHPC industry standards, Qinglong understands the decisive impact of material properties on precision. By adjusting steel fiber content and gradation, its independently developed UHPC material achieves a flexural strength of over 25MPa with an elastic modulus stable at 40GPa, effectively reducing component deformation during transportation and installation. To address the “stress concentration” problem in multi-curved splicing, Qinglong innovatively adopted a “gradient transition splicing process,” combining gradient design at component edges with specialized structural adhesive, which ensures splicing strength while avoiding the cracking risk of traditional rigid connections. In the Dongguan Women and Children's Activity Center project, this process successfully solved the splicing challenge of double-curved GRC-UHPC composite components, winning the Silver Award of the GRC Construction Engineering Innovation Award.

IV. Full-Chain Service Assurance: Closed-Loop Management from Technical Solutions to After-Sales Maintenance

Supported by full-chain service capabilities spanning “detailed design-manufacturing-construction and installation-after-sales maintenance,” Qinglong carries precision control throughout the entire project cycle. In the early stage, solutions are collaboratively optimized with designers through BIM technology; in the middle stage, standardized production is achieved based on the 600,000㎡ annual capacity of its production base in Nanning, Guangxi; in the later stage, after-sales maintenance service with 24-hour response is provided. For overseas projects, such as the multi-curved UHPC curtain wall of a landmark building in Malaysia, Qinglong overcame the impact of climate differences on splicing precision through coordination between localized technical teams and its domestic R&D center, demonstrating the global service capability of “Intelligent Manufacturing from China.”

From the streamlined skin of the Guangzhou Opera House to the irregular sun-shading system of a commercial complex in Shanghai, Qinglong's 28 years of industry experience prove that precision control in the splicing of multi-curved UHPC shapes is not merely a technical issue, but a systematic test of materials, processes, and management. Looking ahead, Qinglong will continue to uphold its mission of “Creating Beautiful Architecture,” pushing the application boundaries of UHPC in architectural decoration through technological innovation, providing designers and owners with “expert solutions” from concept to realization, and helping bring more architectural masterpieces to life.