1. Main Technical Content Computer-controlled overall lifting and jacking technology is an advanced method used for installing large steel structures and heavy equipment. This innovative approach combines mechanical, hydraulic, computer control, and sensor monitoring systems to address challenges that traditional lifting methods cannot overcome—such as limitations in height, weight capacity, structural connections, and site constraints. The technique is known for its safety, reliability, maturity, and high economic efficiency. It operates on the principle of "flexible steel strand load-bearing, hydraulic cylinder clusters, and computer-controlled synchronized lifting." By using computers to precisely manage synchronization at each lifting point, it ensures smooth and controlled operations during installation.
2. Technical Indicators When determining a lifting or jacking plan, both the load-bearing structure (permanent or temporary) and the strength, stiffness, and stability of the structure being lifted must be considered. A thorough analysis of the mechanical performance under construction conditions is essential, along with calculating forces at each lifting point and ensuring the proper placement of jacks. The support structures and foundations must also be checked for bearing capacity and overall stability, especially under the most unfavorable conditions. The degree of unsynchronization between different points should be calculated and set appropriately to maintain balance and safety throughout the process.
The selection of lifting mode focuses on minimizing the height of the load-bearing structure while ensuring its stability. Safety and stability of the structure or equipment during lifting are also key priorities. When deciding the number and location of lifting points, the primary goal is to ensure stability during the lift, followed by optimizing the number of points to reduce costs and improve efficiency. The lifting equipment must meet design requirements, be compact, durable, easy to maintain, and capable of fulfilling engineering needs like mobility, speed, and safety features.
3. Key Technical Features of the Sliding Method The sliding method is highly versatile and can be applied 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 more trusses simultaneously, these structures can be installed efficiently. The propulsion system used in the sliding method can be a computer-controlled, synchronized hydraulic crawler, offering high automation, ease of use, strong safety, and wide applicability. This makes it a flexible and reliable solution for various projects.
4. Main Technical Measures of the Sliding Method 1) Construction Plan Preparation: A detailed plan is developed to guide the entire process, including dividing the slip units, setting up the assembly platform, performing high-altitude assembly, establishing the traction system, choosing between strip or cumulative slipping, determining drop-off positions, implementing construction monitoring, and preparing emergency plans. 2) Erection of High-Altitude Assembly Platforms and Truss Assembly. 3) Installation of the Slide Track. 4) Setup of the Synchronized Sliding System. 5) Stress and Strain Monitoring: Ensuring all activities take place under controlled conditions to maintain structural integrity and safety.
5. Scope of Application (1) Large-span steel structures such as stadium roofs, theater ceilings, hangars, and steel flyovers can benefit from this technology if there are suitable ground assembly areas and stable surrounding conditions. (2) Ultra-high components like TV tower trusses and power plant boilers can be upgraded using this method. (3) Large equipment such as main girders and boilers of heavy gantry cranes can also be lifted and installed effectively with this technique.
6. Typical Projects That Have Been Applied This technology has been successfully used in several major projects, including the main library steel structure of the National Library (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).
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