How to Design a Lifting Plan for Large-Scale UHPC Artistic Shapes? Qinglong's Safe and Efficient Lifting System

The hoisting plan for large UHPC art sculptures (weight ≥500kg, height ≥3m) must balance safety, precision and efficiency, centered on a four-stage design of "pre-hoisting preparation - hoisting method selection - hoisting process control - post-hoisting fixing". With load calculation, specialized equipment and a professional team, Qinglong Group has achieved zero-accident hoisting with a precision of ≤±2mm in projects such as the Shanghai Astronomy Museum and the Guangxi New Media Center.

1. Pre-Hoisting Preparation: Laying the Foundation for Safety

Load and stress calculation: ANSYS software is used to calculate the sculpture's dead weight, wind load and hoisting inertia force, and to determine the hoisting points (≥4) and lifting equipment capacity (safety factor ≥1.5). For Qinglong's 3-meter-high sculpture at the Shanghai Astronomy Museum (weight 800kg), 6 hoisting points were set after calculation, with lifting equipment capacity ≥1200kg. Lifting equipment and hoisting point design: Specialized vacuum suction cups (suction force ≥1.2 times the dead weight) or flexible slings (to avoid damaging the sculpture) are selected, with hoisting points set at the load-bearing frame to keep stress away from weak parts. Qinglong's vacuum suction cups are equipped with pressure monitoring devices that automatically alarm when suction force is insufficient. Site and route planning: The hoisting site is cleared (bearing capacity ≥25kPa), the hoisting route is planned (avoiding obstacles and high-voltage lines), and temporary protective shelters are erected. For one Qinglong project, the hoisting route was rehearsed in advance, avoiding 3 obstacles to ensure smooth passage.

2. Hoisting Method Selection: Adapting to Different Sculpture Characteristics

Crane hoisting: Suitable for heavy sculptures (≥1 ton) with great height (≥5m), using truck cranes or crawler cranes with boom length adjusted according to height. For Qinglong's hyperbolic components at the Guangxi New Media Center (weight 1.2 tons), a 25-ton truck crane was used, achieving high hoisting efficiency with precision ≤±2mm. Hydraulic lifting: Suitable for extra-large, high-altitude hoisting (height ≥10m), with synchronized lifting by hydraulic jacks ensuring uniform load distribution. For a Qinglong municipal large art wall (weight 5 tons), hydraulic lifting was adopted with a synchronization error ≤±1mm. Manually assisted hoisting: Suitable for smaller sculptures (weight 500-800kg) and confined sites, using manual chain hoists + guide wheels. For one Qinglong indoor art sculpture, manually assisted hoisting was adopted due to site constraints, completing positioning in 2 hours.

3. Hoisting Process Control: Ensuring Precision and Safety

Trial lifting verification: A trial lift (lifting height 20-50cm) is conducted before formal hoisting to check the lifting equipment, hoisting points and sculpture stability, and hoisting continues only when no abnormalities are found. Qinglong arranges dedicated personnel to monitor trial lifts; slight deformation at a hoisting point was detected and adjusted in time to avoid risks. Synchronized control: Synchronization control devices are used in multi-point hoisting to ensure the sculpture rises smoothly without tilting (tilt angle ≤1°). In Qinglong's sculpture hoisting at the Shanghai Astronomy Museum, the synchronization error was ≤±0.5mm and the sculpture rose vertically. Real-time positioning: 3D laser scanners are used to monitor the sculpture's position in real time and compare it with the BIM model, with adjustments made when deviation exceeds ±1mm. Qinglong's hoisting positioning accuracy is ≤±0.8mm, ensuring precise installation positions.

4. Post-Hoisting Fixing and Safety Assurance

Temporary fixing: After the sculpture is in place, temporary clamps (such as angle steel and steel wire ropes) are used for fixing to prevent displacement caused by wind loads. Qinglong's temporary fixing strength is ≥1.2 times the design load, ensuring stability. Permanent fixing: Bolt connection and grouting are carried out according to the design plan, followed by strength testing after fixing (pull-out test ≥ design value). After the permanent fixing of Qinglong's Shanghai Astronomy Museum sculpture, the pull-out strength met the standard with no loosening. Safety protection: A warning zone (radius ≥5m) is set up during hoisting, with dedicated commanders and safety officers; hoisting stops in severe weather conditions (wind force ≥ level 6, heavy rain). All Qinglong hoisting projects are staffed with more than 3 professionals, with a safety accident rate of 0.

5. Proven Qinglong Hoisting Projects and Technical Advantages

Proven cases: The 3-meter-high UHPC sculpture at the Shanghai Astronomy Museum (weight 800kg) was hoisted with a truck crane + vacuum suction cups, completed in 2 hours with precision ≤±1.2mm; the 1.2-ton hyperbolic components at the Guangxi New Media Center were hoisted by truck crane and positioned precisely; a municipal 5-ton art wall was hoisted by hydraulic lifting with a synchronization error ≤±1mm. Technical advantages: Precise load calculation with ample safety factors; customized design of lifting equipment and hoisting points adapted to sculpture characteristics; real-time positioning and synchronized control to ensure precision; an experienced professional team capable of handling complex scenarios.

The hoisting plan for large UHPC art sculptures requires scientific design and precise execution, with safety assurance and precision control at its core. With load calculation, specialized equipment, a professional team and process control, Qinglong Group achieves safe and efficient hoisting of large UHPC art sculptures. Choosing a manufacturer with experience in large-scale hoisting is the key to a project's successful implementation.