1. Main Technical Content Computer-controlled overall lifting and jacking technology represents an advanced method for installing steel structures and large equipment. It combines mechanical, hydraulic, computer control, and sensor monitoring systems to address challenges that traditional lifting methods struggle with, such as height limitations, weight capacity, structural connections, and site constraints. This technique is known for its safety, reliability, maturity, and high economic efficiency. The core principle involves using flexible steel strands for load distribution, combined with a cluster of hydraulic cylinders controlled by a computer to ensure synchronized lifting or jacking. This level of precision ensures smooth and safe operations during complex construction tasks.
2. Technical Indicators When determining the lifting or jacking plan, it's essential to consider both the load-bearing structure (permanent or temporary) and the strength, stiffness, and stability of the structure or equipment being lifted. A thorough analysis of the mechanical performance under construction conditions is necessary, including force calculations at each lifting point. The support structure and foundation must also be evaluated to ensure they can handle the loads and maintain stability in all conditions. The degree of synchronization between lifting points should be carefully calculated to prevent uneven movement during the process.
The selection of lifting mode should aim to minimize the height of the load-bearing structure while ensuring stability. It should also prioritize the safety and stability of the structure or equipment during lifting. When deciding on the number and location of lifting points, the main goal is to maintain stability throughout the lifting process, then reduce the number of points where possible to improve efficiency. Additionally, the lifting equipment must meet the design requirements, offering compactness, durability, ease of maintenance, and adaptability to project-specific needs like mobility, speed, and safety features.
3. Main Technical Features of the Sliding Method The sliding method is highly versatile and applicable not only to one-way trusses but also to two-way trusses or grids with limited rigidity. By increasing support points, expanding the assembly platform, or assembling multiple trusses simultaneously, these structures can be installed efficiently using the sliding technique. The propulsion system used in this method can be a computer-controlled, synchronized hydraulic crawler, which offers high automation, ease of operation, excellent safety, and strong versatility for various applications.
4. Main Technical Measures of the Sliding Method 1) Preparation of the Construction Plan: This includes defining slip units, setting up assembly platforms, performing high-altitude assembly, establishing the traction system, choosing between strip or cumulative sliding, determining drop-off positions, implementing construction monitoring, and preparing emergency plans. 2) Erection of the high-altitude assembly platform and truss assembly. 3) Installation of the slide track. 4) Setting up the synchronous sliding system. 5) Stress and strain monitoring to ensure construction is carried out safely and under controlled conditions.
5. Scope of Application (1) Large-span roofs and steel structures, such as stadiums, theaters, hangars, and steel flyovers, can benefit from this technology if there are suitable ground assembly areas and good surrounding support. (2) Ultra-high components like TV tower trusses and power station boilers can be upgraded using this method. (3) Large equipment such as main girders and boilers of heavy gantry cranes can also be improved through this technique.
6. Typical Projects That Have Been Applied This technology has been successfully applied in several major projects, including the National Library’s main steel structure (10,800 tons), the roof steel structure of the A380 aircraft maintenance warehouse at Capital International Airport (10,500 tons), the Shenzhen Civic Center’s large roof, the Guangzhou New TV Tower, the installation of a 130mm × 4200mm CNC hydraulic coil machine at Dongfang Boiler Factory, and the overall upgrade of an 800t × 185m gantry crane (4,750 tons) at Offshore Oil Engineering (Qingdao). These examples demonstrate the wide applicability and effectiveness of the technology in real-world scenarios.
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