How to Control the Splicing Precision of Multi-Curved UHPC Shaping? A Millimeter-Level Control Solution

The core of joint precision control for multi-curved UHPC shapes lies in "upfront design optimization, production precision control, installation technical assurance, and closed-loop inspection and acceptance," with a target joint error of ≤0.5mm. Leveraging technologies such as BIM simulation and laser positioning, Qinglong has delivered smooth, visually seamless joints for projects including the Guangxi New Media Center and Hainan Poly Peninsula No. 1.

1. Upfront Design Optimization: Laying the Foundation for Jointing

The design phase reduces potential joint errors. Parametric panelization: Rhino+Grasshopper divides the shape into panels by curvature variation, with each panel featuring a single curvature to reduce jointing difficulty; Qinglong achieves a curvature match rate of ≥99% between adjacent panels after panelization. Joint node design: tongue-and-groove or lap joint designs are adopted, with 2-3mm expansion joints reserved; Qinglong's tongue-and-groove depth is ≥15mm for enhanced jointing stability. BIM joint simulation: the installation process is simulated in advance to optimize the jointing sequence and avoid interference; Qinglong's BIM simulation achieves 100% accuracy in predicting joint errors. Tolerance design: a reasonable tolerance range (±0.3mm) is designed based on production and installation errors; Qinglong's tolerance design is 20% stricter than industry standards.

2. Production Precision Control: Controlling Errors at the Source

The production stage ensures component precision. Digital molds: five-axis machined molds with ±0.3mm precision; Qinglong's mold machining error is ≤0.2mm, guaranteeing component forming precision. In-process inspection: each component is measured with a laser thickness gauge and 3D scanner before shipment; components with errors exceeding ±0.3mm are reworked, and Qinglong's pre-shipment inspection pass rate is 99.8%. Material consistency: UHPC slurry from the same batch is used with uniform curing conditions (temperature 20±2°C, humidity ≥90%); Qinglong's component shrinkage deviation is ≤0.1%, reducing joint errors.

3. Installation Technical Assurance and Inspection & Acceptance

Installation and inspection achieve millimeter-level jointing. Laser positioning installation: laser line projectors plus total stations are used for positioning, with real-time adjustment during the installation of each component; Qinglong's laser positioning precision is ±0.1mm with joint error ≤0.4mm. Custom clamp fixing: adjustable clamps are used for temporary fixing to prevent displacement during installation; Qinglong's clamp adjustment precision is ±0.2mm. Sealing treatment: joints are filled with elastic sealant to conceal minor errors; Qinglong's sealant color matches the components for a visually seamless finish. Inspection and acceptance: after installation, flatness is checked with a 2m straightedge with error ≤0.5mm; Qinglong's acceptance pass rate is 100%. Project cases: the double-curved UHPC facade of the Guangxi New Media Center (no two panels are identical) has a joint error of ≤0.4mm with a smooth overall curvature; the double-curved curtain wall of Hainan Poly Peninsula No. 1, spanning 12,000㎡, shows no visible joints and has won high recognition from the owner. Qinglong's commitment: joint precision for multi-curved shapes of ≤0.5mm, with unconditional rectification if exceeded, ensuring dual compliance in both visual and structural terms.