{"id":899,"date":"2025-04-09T10:42:34","date_gmt":"2025-04-09T02:42:34","guid":{"rendered":"https:\/\/www.cnkelaiii.com\/?p=899"},"modified":"2025-07-03T23:05:52","modified_gmt":"2025-07-03T15:05:52","slug":"what-jack-is-used-in-prestressed-concrete","status":"publish","type":"post","link":"https:\/\/www.cnkelaiii.com\/fa\/blog\/what-jack-is-used-in-prestressed-concrete\/","title":{"rendered":"\u0627\u0632 \u0686\u0647 \u062c\u06a9\u06cc \u062f\u0631 \u0628\u062a\u0646 \u067e\u06cc\u0634\u200c\u062a\u0646\u06cc\u062f\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f\u061f"},"content":{"rendered":"

Hydraulic steel strand tensioning machine<\/a>: core equipment for prestressed construction<\/span><\/h2>\n

\u0645\u0627\u0634\u06cc\u0646 \u062a\u0646\u0634\u200c\u062f\u0647\u06cc \u062c\u06a9 \u0647\u06cc\u062f\u0631\u0648\u0644\u06cc\u06a9 \u0628\u0631\u0627\u06cc \u067e\u06cc\u0634\u200c\u062a\u0646\u06cc\u062f\u06af\u06cc<\/span> plays a vital role in modern bridges, buildings and large infrastructure projects. This equipment uses a precise hydraulic system to apply tension. This helps prestressed materials, like steel strands, meet design needs in concrete structures. This article will deeply analyze its core functions, technical advantages and typical application scenarios, and focus on the application characteristics of prestressing steel wire tension machine and hydraulic jack tension machine.<\/span><\/p>\n

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1. Core functions and technical advantages of the equipment<\/span><\/h3>\n

Efficient hydraulic drive system<\/strong><\/span>
\nThe hydraulic tensioning machine uses an ultra-high pressure oil pump (such as the KELAI series, with a maximum tension of 10,000 KN) to provide power, and uses a double-acting hydraulic jack to achieve precise tensioning and retraction of the steel strand. Its small design and strong output can work in tough construction areas. This includes high-altitude bridge work or tight spaces.<\/span><\/p>\n

Intelligent control and safety assurance<\/strong><\/span>
\nThe equipment is usually equipped with an electronic pressure sensor and a calibration system to ensure that the accuracy error of the tensioning force is less than 1%. Some models need regular checks by a metrology agency. They are monitored by comparing the oil pressure gauge to the tension value in real time.<\/span><\/p>\n

Modular design<\/strong><\/span>
\nSupports rapid adaptation to components such as limit plates and tool anchors to simplify the installation process. For example, the limit plate needs to match the aperture of the anchor plate, and the tool anchor is installed on the piston end to fix the steel strand.<\/span><\/p>\n

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2. Typical application scenarios<\/span><\/h3>\n

Bridge engineering<\/span><\/strong>
\nWhether it is a highway bridge or a railway bridge, the hydraulic tensioning machine is used for the prestressing construction of the main beam and piers. For example, in a continuous beam bridge, multiple jacks are used to simultaneously tension the steel strands to ensure that the structure is evenly stressed.<\/span><\/p>\n

Prefabricated buildings and hydropower dams<\/span><\/strong>
\nIn the floor slabs or dam gates of prefabricated buildings, the equipment can apply hundreds of tons of prestressing to enhance the crack resistance and bearing capacity of the concrete. Some models (such as YDC6500) support the tensioning of large-diameter steel strands (220 mm) and are suitable for heavy structures. Hydraulic tensioning machines are required for the production of prestressed concrete slabs and precast concrete SP slabs<\/a>.<\/span><\/span><\/p>\n

Industrial equipment maintenance and transformation<\/span><\/strong><\/span>
\nHydraulic tensioning technology can also be used for synchronous jacking of factory equipment, pipeline jacking (such as no excavation engineering) and replacement of bridge bearings. Its lightweight design is easy to carry and quickly deploy.<\/span><\/p>\n

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3. Selection and maintenance recommendations<\/h3>\n

Model matching<\/span><\/strong>
\nSelect the corresponding tensioning force (such as YDC1000 is suitable for 1,000 KN projects) and aperture (such as 72 mm to 270 mm) according to the specifications of the steel strand, and ensure that the oil pump pressure (48-53 MPa) is compatible with the system.<\/span><\/p>\n

Regular calibration and maintenance<\/span><\/strong><\/p>\n

New Hydraulic Jack Tension Machine for Prestressing equipment needs to be calibrated before first use, and re-tested every 6 months or after 200 operations;<\/span><\/p>\n

Use a pressure gauge diagnostic tool kit (such as the HydraCheck series) to monitor the stability of the hydraulic system to prevent oil pressure leakage or instrument failure.<\/span><\/p>\n

Operation specifications<\/span><\/strong>
\nWhen multiple devices work together, a dedicated person is required to direct to avoid structural damage caused by unsynchronized tensioning. A grinding wheel saw should be used to cut the steel strand to ensure that the end surface is flat and burr-free.<\/span><\/p>\n

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4. Industry Trends and Innovations<\/h3>\n

With the popularization of intelligent construction, some manufacturers (such as HENAN KELAI INDUSTRIAL CO., LTD) have launched hydraulic tensioning systems integrated with the Internet of Things (IoT), which can remotely monitor tensioning data and generate reports. In addition, the introduction of lightweight design and high-pressure materials (such as titanium alloy pistons) further improves the portability and life of the equipment.<\/span><\/p>\n

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5.Conclusion of Hydraulic Jack Tension Machine for Prestressing<\/span><\/h3>\n

Hydraulic strand tensioning machine is an indispensable “invisible force” in prestressed engineering. The prestressed strand tensioning machine and the hydraulic jack tensioning machine both work efficiently. They prioritize precision, safety, and effectiveness. Choosing a reliable supplier (such as HENAN KELAI INDUSTRIAL CO., LTD (KELAI\u00ae)<\/a> <\/span><\/strong>) and following scientific maintenance procedures will maximize the value of the equipment and help improve the overall quality of the project.<\/span><\/p>\n

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