Analysis of UHPC Manufacturers' Collaboration Cases and Application Value in Construction Projects

As the "outer garment" of modern architecture, building curtain walls not only carry the important task of aesthetic expression, but also directly affect the safety and durability of buildings. With their exceptional sculptural plasticity, special-shaped GRC curtain walls have become the core material for shaping the unique texture of landmark buildings, yet controlling installation errors has always been an industry pain point. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has drawn on full-chain technical accumulation, from detailed design to construction implementation, to develop a systematic error control solution, providing technical support for the precise realization of complex building envelopes.

1. The "Hidden Killers" of Special-Shaped GRC Curtain Wall Installation Errors: From Material Properties to Construction Challenges

Error control for special-shaped GRC curtain walls must confront three core challenges: first, the properties of the material itself—GRC components may undergo 0.3%-0.5% shrinkage deformation during production and curing, and if allowances are not reserved at the design stage, on-site assembly misalignment can easily occur; second, the difficulty of positioning complex shapes—the spatial coordinates of special-shaped components such as double-curved surfaces and openwork structures must be accurate to the millimeter level, which traditional setting-out methods struggle to achieve; third, the dynamic influence of the construction environment—factors such as temperature changes and settlement of the base structure can all trigger cumulative errors. Take a cultural center project as an example: its facade used 1,200 GRC unit panels of varying curvatures. In the early stage, failure to account for thermal stress caused cracking at 3 joints. After the Qinglong technical team intervened and optimized the design, errors were controlled within ±2mm through BIM pre-assembly and flexible joint design.

2. Full-Chain Error Control Technology: From Design Source to Construction Closed Loop

Through full-process technological innovation spanning "design–production–construction," Qinglong Group has established an error control system for special-shaped GRC curtain walls. At the detailed design stage, parametric modeling (Rhino+Grasshopper) and finite element analysis are used to simulate component stress and deformation in advance, embedding parameters such as shrinkage rate and thermal coefficients into the model to generate machining drawings with error compensation; in production, automated production lines are introduced, with robotic carving and 3D scanning quality inspection ensuring component dimensional deviation ≤1mm/m; at the construction stage, the pioneering "3D laser scanning + modular installation" technology uses point cloud data to calibrate base structure deviations in real time, combined with customized aluminum alloy connectors for six-degree-of-freedom fine adjustment, achieving industry-leading on-site installation precision of ±3mm.

3. Industry Standards and Qinglong Practice: From Technical Specifications to Engineering Verification

As a participating unit in drafting the Technical Standard for Building Application of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group deeply integrates standard requirements with engineering experience. Addressing the special needs of special-shaped curtain walls, it was the first in the industry to propose the "three-level error control" concept: Level 1 control (factory fabrication) ensures component geometric precision; Level 2 control (transportation and storage) uses customized fixtures to prevent deformation; Level 3 control (on-site installation) eliminates cumulative errors through BIM pre-assembly. This system was verified in the Nanjing East Road Century Plaza renovation project. The project adopted a translucent GRC curtain wall and glass combination system, and with Qinglong's full-chain technical support, it ultimately achieved seamless assembly of 3,000㎡ of special-shaped curved surfaces, winning the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

Error control for special-shaped GRC curtain walls is, in essence, a comprehensive embodiment of materials science, engineering technology, and digital management. With 28 years of full-chain experience as its foundation, Qinglong Group has transformed "millimeter-level precision" from concept into reality through technological innovation and standard leadership—not only safeguarding the realization of architects' creative visions, but also driving the industry's leap from "experience-based construction" to "digital construction." In the future, as new materials such as UHPC/GRC continue to advance, Qinglong will keep exploring more efficient error control solutions, injecting technical momentum into its mission of "creating beautiful architecture."