I. Structural Characteristics
This heavy-duty hydraulic jack adopts an extended cylindrical main body, with the whole surface sprayed with green anti-corrosion coating to adapt to long-term outdoor construction. Multiple lifting lugs are reserved on the cylinder body, which makes on-site hoisting, moving and positioning much easier for workers, even in complicated working conditions.
Hydraulic connectors with black protective fittings are installed at both ends of the cylinder. The double-acting hydraulic layout allows hydraulic power to drive both cylinder extension and retraction, instead of relying on spring reset. This design guarantees active and reliable return stroke throughout repeated operation.
Different from traditional center-hole tensioning jacks with full through holes, this equipment has a solid pushing end with only a small central pilot hole at the front. The solid front structure provides stronger integral rigidity and pure pushing performance, which is the core structural difference from hollow prestressing jacks.
The cylinder barrel is designed with segmented high-strength alloy steel structure. The optimized barrel layout enables the jack to bear continuous high-tonnage pushing load without deformation, fully meeting the requirements of long-time heavy-pressure operation on site.
II. Main Engineering Application Scenarios
Bridge Construction: Widely used in bridge beam construction, including box girder overall launching, transverse beam displacement and jacking adjustment during bearing replacement. It can cooperate with walking launching systems to complete longitudinal and transverse moving, as well as accurate three-dimensional positioning of steel box girders and concrete beam segments. It is commonly adopted in viaducts, overpasses and long-span valley bridges.
Civil and Structural Engineering: Capable of synchronous jacking for large building components. It can be used for auxiliary support of foundation pit retaining structures, as well as horizontal pushing and position adjustment of heavy mechanical equipment on construction sites.
Prestressing Auxiliary Construction: Matched with conventional prestressing systems to carry out structural preloading and component alignment correction, providing stable load basis for subsequent tensioning and construction.
Intelligent Synchronous Jacking: The jack can be connected with PLC synchronous control system. Multiple jacks can work synchronously at multiple points to realize unified pressure and displacement control for large-area jacking projects.
III. Core Product Performance and Advantages
Strong Bearing Capacity: Conventional tonnage ranges from 200t to 1000t, which covers most heavy-load jacking demands in infrastructure projects. Customized stroke and tonnage are available according to actual site working conditions to fit personalized construction requirements.
Stable Double-Acting Hydraulic Control: Both stretching and retracting processes are driven by hydraulic force. Compared with single-acting jacks, this model features faster operation cycle, higher construction efficiency and more thorough reset, avoiding jamming caused by incomplete return stroke.
Field-Friendly Lifting Layout: The distributed lifting lugs make overall hoisting and installation more convenient. It is especially suitable for high-altitude installation and narrow working spaces where conventional handling tools cannot operate normally.
Excellent Heavy-Load Durability: The whole cylinder is made of high-strength alloy steel, equipped with wear-resistant and high-pressure resistant sealing components. It can maintain stable working performance under long-term continuous heavy load, resisting pressure impact and structural wear.
High Synchronization Control Accuracy: Compatible with common hydraulic pump stations and intelligent synchronous jacking systems on the market. The displacement control accuracy can reach ±0.5mm, which ensures smooth and steady movement of heavy components without offset or jitter during synchronous jacking.
Good Environmental Adaptability: Designed for harsh construction scenarios including bridge engineering, water conservancy projects and large-scale municipal infrastructure. The overall structure is sturdy and wear-resistant, with outstanding long-term stability and low failure rate in field operation.
IV. Extended Typical Working Conditions
Trenchless Pipe Jacking Works: Provides stable high-tonnage axial thrust for pipe jacking machines. It pushes pipelines and large box culverts through soil layers to realize trenchless underground pipeline construction, applicable for long-distance and large-diameter pipe jacking projects.
Various Heavy-Duty Operations: Besides bridge and foundation projects, this jack is also widely used in heavy equipment lifting, static pile pressing, horizontal displacement and calibration of large structural parts, and overall shifting and relocation of existing buildings.
