Research on Splicing Precision Control Methods and Key Technologies for Multi-Curved UHPC Shapes

[Precision Control of Multi-Curved UHPC Surface Jointing: From Millimeter-Level Tolerances to the Perfect Realization of Architectural Aesthetics]

In contemporary architectural design, multi-curved UHPC (Ultra-High Performance Concrete) has become the core material for landmark buildings to achieve complex aesthetic expression, thanks to its outstanding mechanical properties and design freedom. However, controlling the jointing precision of its non-linear curved surfaces has long been a recognized technical challenge in the industry. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group has—through three rounds of technological innovation in digitized detailed design, standardized production processes, and intelligent installation—controlled the jointing tolerance of multi-curved UHPC surfaces within ±1.5mm, providing precision assurance for 500+ landmark projects worldwide.

I. Detailed Design: Parametric Modeling Solves Curved Surface Geometry Challenges

Precision control of multi-curved UHPC surfaces begins at the design source. Qinglong's technical team uses the Rhino+Grasshopper parametric design platform to transform architects' creative sketches into quantifiable digital models. By establishing surface continuity analysis algorithms, the team automatically detects and optimizes curvature transitions between adjacent components, ensuring the mathematical continuity of complex forms such as hyperbolic and twisted surfaces. In the Dongguan Women and Children's Activity Center project, the team used BIM technology to conduct pre-assembly simulation of 126 irregularly shaped UHPC cladding panels, avoiding 37 potential jointing conflicts in advance and improving on-site installation efficiency by 40%.

II. Mold Manufacturing: Coordinated Control of CNC Machining and Material Properties

Mold precision directly determines the forming quality of UHPC components. Qinglong has introduced five-axis machining centers to achieve micron-level engraving of mold cavities, combined with its proprietary elastic modulus compensation technology to effectively offset the micro-shrinkage deformation of UHPC materials during curing. For the translucent concrete project at Century Plaza on Nanjing East Road, the team innovatively adopted a composite mold system of "steel mold + flexible liner," achieving 0.1mm-level arrangement precision of light-transmitting aggregates and ensuring uniform light refraction at curved surface joints. This process enabled Qinglong to contribute key technical parameters to the 2024 industry standard "General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components."

III. Installation: Intelligent Coordination of 3D Scanning and Real-Time Adjustment

On-site installation is the last line of defense for precision control. Qinglong's "point cloud scanning – deviation analysis – real-time adjustment" construction system uses the Leica TS60 total station for millimeter-level positioning, together with its proprietary hydraulic fine-tuning supports, enabling precise 6-degree-of-freedom adjustment of each component. In an international airport project in Saudi Arabia, the team completed the installation of a double-curved UHPC curtain wall covering a total area of 8,000㎡ in just 45 days, with joint width tolerances controlled within 0.8mm—far exceeding the industry standard requirement of 3mm. This full-process precision control capability has made Qinglong a strategic partner of leading real estate groups such as Poly and China Overseas.

From parametric design to intelligent construction, precision control of multi-curved UHPC surface jointing represents the deep integration of materials science, digital technology, and engineering experience. As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong Group will continue to push the boundaries of UHPC applications in architectural decoration with the craftsman spirit of "meticulousness and the pursuit of excellence." In the future, with the introduction of technologies such as 3D printing and AI simulation, precision control of building skins will advance into the micron-level era, sketching more imaginative curves for urban skylines.