On June 16, good news came from the Jakarta International Exhibition Center Steel Structure Project in Indonesia, undertaken by the Metal Structure Company. The project successfully applied the ultra-large component hydraulic synchronous lifting technology to complete the overall lifting of the 9,041㎡ large-span welded-ball steel grid roof. The entire process was safely controlled and met all accuracy requirements, accumulating valuable practical experience for similar large-span steel structure roof construction projects.

The project's roof steel grid has a total span of 70 meters, with a bearing elevation design of 31 meters and a total self-weight of approximately 800 tons. It adopts welded-ball joint nodes, constituting a typical large-span, heavy-load, elevated steel structure system. The traditional high-altitude scattered assembly process would require the erection of extensive elevated support frames, which entails drawbacks such as substantial high-altitude workload, long construction periods, difficult quality control, and high safety risks. Taking into account the site conditions and structural characteristics, the project team optimized the construction approach by adopting a ground-level overall assembly + hydraulic synchronous integral lifting scheme. This approach transferred core processes such as assembly and welding to ground-level operations, fundamentally reducing safety risks including falls from height and falling object strikes at the source.

To ensure the lifting operation was foolproof, the technical team completed full-process simulation verification and specialized scheme formulation in advance, and conducted design and论证 in strict accordance with applicable standards and specifications. Based on the force characteristics of the grid structure, 18 lifting points were arranged across the site, with two types of hydraulic lifters—TLJ-600 and TLJ-2000—configured in different zones according to load variations, complemented by 1860MPa-grade special steel strands. The safety factor of all lifting point lifters exceeded 1.25, and that of the steel strands exceeded 2.0, fully meeting code requirements. Additionally, by installing steel lattice lifting supports, adding temporary members and lower suspension point structures, and installing steel strand guide frames, issues such as strand entanglement and eccentric wear were effectively avoided, solidifying the hardware foundation for grid lifting. Meanwhile, in view of local meteorological conditions, the project team formulated preventive measures against wind, rain, and typhoons in advance, and prepared emergency response plans covering various sudden scenarios including hydraulic system failure, sudden power outages, falls from height, and falling object strikes, with emergency personnel and materials fully allocated to ensure risks are preventable and emergencies manageable.

The lifting operation relied on the TL-CS 11.2 computer synchronous control system and the TL-HPS60 hydraulic pump source system to establish a fully automatic closed-loop control system, capable of real-time monitoring of jack point pressure and displacement data, achieving load balancing, attitude correction, fault alarming, and millimeter-level precise fine-tuning. At the same time, the construction process strictly followed standardized procedures. First, the overall assembly was completed on the ground directly beneath the grid's projection, while the lifting supports, hydraulic equipment, and sensing systems were installed and debugged simultaneously. Then, a graded trial lifting was carried out with loads incrementally increased from 20% to 100%. Once the grid was lifted 100mm off the ground support jigs, it was suspended in the air for over 12 hours for comprehensive inspection of the structure and equipment status. After confirmation of no abnormalities, the official integrated synchronous lifting was initiated at a lifting speed of 4 meters per hour. During the lifting process, a dual-control strategy of "displacement synchronization + oil pressure balancing" was implemented on site, with professional surveyors continuously monitoring and verifying the grid attitude and elevation differences among lifting points, relying on the control system for real-time precise adjustments. After the grid was precisely positioned at the design elevation, the construction team immediately proceeded with the installation of infill members at supports, weld inspection and testing, and other tasks. After all post-installed components passed acceptance inspection, a graded synchronous unloading process was adopted to release the load at the lifting points proportionally, with real-time monitoring of load transfer and displacement changes. Inspection results showed that the grid mid-span deflection, member stresses, and temporary structure deformation all met design specifications and acceptance requirements, and the strength, stiffness, and stability of temporary structures such as lifting supports and embedded parts all reached compliance standards.

The successful completion of the large-span steel grid roof lifting at the Jakarta Convention Center project fully demonstrates the efficient, controllable, and safe advantages of hydraulic synchronous lifting technology in the installation of heavy-load, large-span steel structures, significantly improving construction efficiency, shortening the schedule, and reducing costs. Going forward, the project team will continue to stay focused on the goal of completion and delivery, strictly adhering to safety and quality bottom lines, advancing subsequent construction with high standards, and ensuring the smooth completion of the project through exquisite technical skills and meticulous management. The team is committed to building an overseas benchmark steel structure project and adding new luster to the "Henan Installation" brand on the international stage.